Micrel KSZ8895 Specifications

Micrel KSZ8895 Specifications
FTM
富昌电子技术杂 志
asia pacific
Technology Magazine from Future Electronics
February 2011
Application Spotlight:
LIGHTING
Component Focus - page 2
Proven microcontroller core provides
basis for cost-effective metering family
Freescale Semiconductor
Design Notes - page 7
Getting the most from the new lighting
reference design kit
Freescale Semiconductor
Application Spotlight - page 8
Dimmer-compatible LED drivers maximise
feature integration and flexibility
NXP Semiconductors
Technical view - page 18
Improving comfort and cost savings
with intelligent lighting
Future Electronics
COMPONENT FOCUS
CONTENTS
2
3
Proven microcontroller core provides basis for costeffective metering family
FREESCALE SEMICONDUCTOR
MOSFETs incorporate latest package advances in standard
PQFN outlines
INTERNATIONAL RECTIFIER
Rugged aluminium electrolytic capacitors minimise nonideal parameters
VISHAY
4
IR Introduces the IRF6708S2 and IRF6728M DirectFET®
MOSFET Chipset Tailored for Cost Sensitive DC-DC
Applications
INTERNATIONAL RECTIFIER
Package innovation allows easy visual solder inspection
with highly robust soldering
NXP SEMICONDUCTORS
5
Automotive-microcontroller family delivers maximum
safety and value
FREESCALE SEMICONDUCTOR
6
7
8
10
Micrel Rolls Out New Family of High Current, Ultra Low
Input Voltage LDOs Powering Next Generation Low
Voltage Cores
MICREL SEMICONDUCTOR
Getting the most from the new lighting reference design
kit
FREESCALE SEMICONDUCTOR
Dimmer-compatible LED drivers maximise feature
integration and flexibility
NXP SEMICONDUCTORS
LED driver delivers compromise-free performance with
phase-cut dimmers
Microchip’s New Digital LED Lighting Development Kit
Makes it Easy to Add Intelligence and Improve Efficiency
in LED Lighting Applications
MICROCHIP
Lumex QuasarBrite™ 4-Leaded RGB LEDs
LUMEX
Non-dimming CFL drivers raise performance and
reliability
NXP SEMICONDUCTORS
High Efficiency LED Smart Driver
NATIONAL SEMICONDUCTOR
11
12
13
Advertisement
Join the Lighting Revolution
NXP SEMICONDUCTORS
Vishay Intertechnology Releases Metal-Core-Based, Cold
White LED Power Modules Assembled With 12, 24, or 36
High-Brightness LEDs and Featuring Color Temperature
Range of 5000 K to 7000 K
VISHAY
MCP1630 and MCP1631 High-Speed PWM Controllers
MICROCHIP
Lighting Reference Design kit adds wireless control and
streamlines development
FREESCALE SEMICONDUCTOR
AS1119 drives 144 LEDs, creating colorful and smooth
animations while extending battery life, features best
dimming control and on-chip charge pump
AUSTRIAMICROSYSTEMS
14
15
16
High-Brightness LED Driver with Integrated MOSFET and
High-Side Current Sense
MICREL SEMICONDUCTOR
LED drivers support thermal dimming feedback and
dynamic efficiency optimisation
AUSTRIAMICROSYSTEMS
Advertisement
Bringing the Power to Light™ with Simple HBLED Drivers
MICREL SEMICONDUCTOR
LED controller with hysteretic-mode control enhances
transient response, simplifies design
MICREL SEMICONDUCTOR
Driver boosts CFL performance for next-generation
energy-saving lighting
NXP SEMICONDUCTORS
17
Digital-power controllers unlock performance, flexibility
and energy-efficiency gains
MICROCHIP
Exar Releases Industry’s Highest Intensity Supercapacitor
LED Flash Driver
EXAR
18
Improving comfort and cost savings with intelligent
lighting
FUTURE ELECTRONICS
20
Advertisement
IRS2573D: HID System Know-How-In A Chip
INTERNATIONAL RECTIFIER
2
Freescale
Semiconductor
Micrel Slashes 5 Port Switch-On-a-Chip Power
Consumption In Half
MICREL SEMICONDUCTOR
New Freescale QorIQ processor helps to secure the
network’s edge
FREESCALE SEMICONDUCTOR
NATIONAL SEMICONDUCTOR
9
Proven microcontroller core provides basis
for cost-effective metering family
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has a regulated charge pump for contrast
control.
The MC9S08GW family is supported by a
comprehensive development ecosystem,
including CodeWarrior Development Studio
v10.0 and reference designs for a flow meter
and a single-phase electricity meter. A lowcost development board for the Freescale
Tower System modular development
platform is also available, enabling projects
to start quickly and with minimal hardware
investment.
F EAT UR ES :
ƒƒ Programmable Cyclic Redundancy Check The Freescale Semiconductor MC9S08GW
MCU family comprises low-power 8-bit
devices based on the proven S08 core
running at up to 20MHz, and features
peripherals optimised for utility metering as
well as industrial measurement and control.
The devices integrate an analogue front
end comprising two independent 16bit SAR ADCs and a programmable delay
block, which enables electricity metering
and provides hardware support for currentmeasurement phase-shift compensation.
There is also a pulse counter with automatic
sensor decoding and flow counting for gas
and water meters. The pulse counter is able
to operate when the MCU is in low-power
modes, allowing extended operation in
battery-powered applications.
Also provided on-chip is an independent
real-time clock with calendaring and
tamper-detection functions, as well as a
built-in Automatic Meter-Reading (AMR)
interface enabling glueless connection
to 5V communication modules. A further
feature supporting highly integrated
metering products is a flexible LCD controller
supporting up to 288 segments, which also
(CRC)
ƒƒ Ultra-low-power run, wait and stop modes
ƒƒ Fast wake up from stop/sleep modes
ƒƒ One 16-bit timer, dual 8-bit modulus timers
ƒƒ Voltage regulator and 1.2V reference
ƒƒ 32kbyte and 64kbyte Flash options
A P P L I C AT I O NS :
ƒƒ Single-phase electricity meters
ƒƒ Gas-, water- and heat-flow meters
ƒƒ Industrial flow measurement and control
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
1
COMPONENT FOCUS
MOSFETs incorporate latest package advances in standard PQFN
outlines
International
Rectifier
from lower package resistance leading to a
reduction in overall MOSFET on-resistance.
The IRFH525x, IRFH530x and IRFHM83x
are 25V and 30V power MOSFETs that use
enhancements to the power-QFN (PQFN)
package to support up to 60% higher loadcurrent capability while also benefiting
The improved package technology, called
performance PQFN, includes manufacturing
advances that not only improve electrical
characteristics but also increase thermal
conductivity, improve reliability, and enable
sealing to JEDEC Moisture Sensitivity Level
1. The IRFHM83x series uses the 3mm x
3mmperformance PQFN package, while the
IRFH525x and IRFH530x are available in the
larger 5mm x 6mm outline. By conforming to
established dimensions of PQFN packages, all
three series of devices can be used in designs
requiring higher current-handling capability
without an increase in footprint.
Among the enhanced MOSFETs are devices
optimised for use as control MOSFETs, featuring
low gate resistance leading to reduced
switching losses. For synchronous-MOSFET
Part Number
Package
Breakdown voltage
Typ. on-resistance
@ 10V
Typ. Qg @ 4.5V
Extra die
feature
use, devices are available as a FETky combining
a MOSFET and a Schottky diode in a single
monolithic device. The FETky configuration
reduces the control FET’s reverse-recovery
time, leading to enhanced efficiency and EMI
performance in synchronous switched-mode
converters.
F EAT UR ES :
ƒƒ Sub-1mm package height
ƒƒ Qg down to 7.0nC
ƒƒ ±20V maximum gate voltage (VGS)
ƒƒ Optimised low-Rg variants
A P P L I C AT I O NS :
ƒƒ DC-DC converters for:
• Telecom and Netcom equipment
• High-end desktop PCs
• Notebook computers
IRFHM831
3mm x 3mm
30V
6.6mΩ
7.3nC
Low Rg
IRFHM830D
3mm x 3mm
30V
3.4mΩ
13nC
FETky
IRFHM830
3mm x 3mm
30V
3.0mΩ
15nC
-
IRFH5303
5mm x 6mm
30V
3.6mΩ
15nC
Low Rg
IRFH5304
5mm x 6mm
30V
3.8mΩ
16nC
-
FAX
+65 6808 3886
IRFH5306
5mm x 6mm
30V
6.9mΩ
7.8nC
-
EMAIL
[email protected]
IRFH5255
5mm x 6mm
25V
5.0mΩ
7.0nC
Low Rg
IRFH5250D
5mm x 6mm
25V
1.0mΩ
39nC
FETky
Reader Response No.
2
Rugged aluminium electrolytic capacitors minimise non-ideal
parameters
Vishay
The 146 RTI series of radial aluminium
capacitors from Vishay deliver enhanced
characteristics for smoothing, filtering,
buffering and voltage-decoupling duties,
combining high-temperature capability,
low input impedance down to 18mΩ
at 100kHz, a high rated ripple current of
3200mA, and capacitance values ranging from
68μF to 6800μF.
As a family of highly rugged devices, the 146 RTI
series delivers the low-impedance and long-life
properties of Vishay’s 140RTM series capacitors
with the 125°C temperature capability of the
150RMI series. Rated operating voltages range
from 16V to 63V, and devices are available in
13 case sizes ranging from 10mm x 12mm
to18mm x 35mm.
F EAT UR ES :
ƒƒ ±20% capacitance tolerance
ƒƒ -55°C minimum operating temperature
ƒƒ AEC-Q200 qualified
ƒƒ Integrated pressure relief
ƒƒ Insulated case
The
devices
are
polarised
electrolytic
capacitors with a nonsolid, selfhealing electrolyte. They are engineered for
high performance and reliability in industrial,
automotive, telecommunications and military
systems. They also offer a very long useful
life of up to 6000 hours at 125°C. In addition,
charge- and discharge-proof properties free
these capacitors from traditional limitations
on peak current.
A P P L I C AT I O NS :
ƒƒ Switched-mode power supplies
ƒƒ DC/DC converters
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
3
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3
COMPONENT FOCUS
IR Introduces the IRF6708S2 and IRF6728M DirectFET® MOSFET
Chipset Tailored for Cost Sensitive DC-DC Applications
International
Rectifier
The IRF6708S2 and IRF6728M feature IR’s
latest generation 30V MOSFET silicon. In
addition to low RDS(on) and charge, the new
devices leverage the low parasitic resistance
inductance and superior cooling ability of the
DirectFET package.
International Rectifier, IR® introduced the
IRF6708S2 and IRF6728M 30V DirectFET®
MOSFET chipset tailored for cost sensitive 19V
input synchronous buck applications such as
notebooks.
The IRF6708S2 Small Can and IRF6728M
Medium Can devices reduce component
count by 30 percent to drastically reduce
overall system cost. The new DirectFET
MOSFETs feature low charge and on-state
resistance RDS(on) to minimize conduction
and switching losses. The IRF6728M also
features a monolithically integrated Schottky
that reduces losses associated with body diode
conduction and reverse recovery.
Key Specifications
Part Number
BVDSS
(V)
RDS(on) typ
@10V
(mOhms)
RDS(on) typ
@4.5V
(mOhms)
VGS
(V)
QG typ @4.5V
(nC)
QGD typ @4.5V
(nC)
IRF6728M
30
1.8
2.8
+/-20
28
8.7
IRF6708S2
30
7.5
12.0
+/-20
6.6
2.2
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
4
Package innovation allows easy visual solder inspection with highly
robust soldering
NXP
Semiconductors
The NXP Semiconductors PESDxLD
ESDprotection diodes and BAS16LD
100V single high-speed switching diode
are the first products in the market to
take advantage of NXP’s innovative
SOD882D
leadless
package,
which
offers
enhanced
mechanical properties
and
easy
visual
inspection at a very
low package height of
only 0.37mm.
The SOD882D is the
industry’s first leadless twopin package to feature bottom
pads that are also exposed and tin
plated on the sides thereby allowing soldering
of the side pads. This innovative pad design
allows easy visual solder inspection and high
solder-joint strength to withstand shear forces
and board bending. The thermal, electrical
and mounting characteristics, and the 1.0mm
x 0.6mm footprint, are compatible with other
1006 (0402) packages. With a height of only
4
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0.37mm, the SOD882D is also one of the
flattest packages in this form factor.
The ESD-protection diodes released in
the new package are the PESD5V0V1BLD,
PESD5V0S1BLD,
PESD5V0S1ULD
and
PESD24V0S1ULD, providing a choice of 5V or
24V standoff voltages. These are singlechannel,
bidirectional
devices
meeting the IEC 61000-4-2
specifications for ESD
and surge protection.
The
BAS16LD
highspeed switching diode
is optimised for fast
switching speed, low
capacitace
and
low
leakage current. All the devices
are qualified to AEC-Q101 for use in
automotive applications.
F EAT UR ES :
ƒƒ PESDxLD:
• Low clamping voltage
• 30kV ESD protection
• High peak pulse power
• Low leakage current
ƒƒ BAS16LD:
• 4ns reverse-recovery time
• 215mA forward current
• 0.5μA reverse current
• 1.5pF diode capacitance
A P P L I C AT I O NS :
ƒƒ Computers and peripherals
ƒƒ Communication systems
ƒƒ Networking equipment
ƒƒ Audio and video equipment
ƒƒ Portable electronics
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
5
COMPONENT FOCUS
Automotive-microcontroller family delivers maximum safety and
value
Freescale
Semiconductor
Qorivva 32-bit microcontrollers from
Freescale Semiconductor drive Power
ArchitectureR in-car computing, offering
engineers lower development costs, faster
time to market and zero-defect capability
for engine, safety and body applications.
All devices are based on Freescale’s scalable
e200 processor core, with single-issue or twin
issue configurations providing a wide range of
performance options. Designers can also take
advantage of the single instruction set and
common peripherals to lower development
costs and accelerate time to market.
The Qorivva MPC55xx and MPC56xx families
provide variants featured for specific
application areas. Devices for use in body
and security systems prioritise low power
consumption for “always-on” systems, and
support advanced connectivity standards such
as LIN, CAN, MOST, FlexRay™ and Ethernet.
There is also encryption for advanced vehiclenetwork security.
MCUs for safety and chassis applications
feature a safe computational shell providing
a market-standard safety architecture for
braking, steering and radar-based systems. The
safety architecture includes redundant cores
with fault monitoring and event recording as
well as correction systems ensuring maximum
protection.
Where high sensing and computing
capabilities are required, such as in hybrid
vehicles and power-train-control applications,
multi-core processors and advanced motorcontrol peripherals are combined with
high-precision analogue interfaces and
digital communications links to analogue
sensors. A knock interface is integrated for
powertrain-control applications, bringing
a function traditionally implemented in a
custom ASIC onto the chip to further reduce
development costs. Many Qorivva powertrain
MCUs will also feature Freescale’s advanced
safety architecture. There is also an extensive
development ecosystem, including Freescale
CodeWarrior and third-party tools as well as
software enablement packages including a
motorcontrol library, powertrain and engine
functions, AUTOSAR MCAL driver suites and an
AUTOSAR RTOS for single-core and multi-core
MCUs.
F EAT UR ES :
ƒƒ 300DMIPS performance
ƒƒ 4Mbyte on-chip Flash
ƒƒ Hardware DSP filters
ƒƒ Patented On-Board Diagnostic (OBD) test algorithm
ƒƒ RISC processor for CPU-independent
Functions
A P P L I C AT I O NS :
ƒƒ Powertrain controllers
ƒƒ Engine management
ƒƒ Lighting control
ƒƒ Instrument clusters
ƒƒ Body electronics
ƒƒ Safety equipment
ƒƒ Driver-assistance systems
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
6
Micrel Slashes 5 Port Switch-On-a-Chip Power Consumption In Half
Micrel
Semiconductor
increasing demands for Ethernet connectivity
in consumer and industrial applications, the
family features advanced power management
and sophisticated Quality of Service (QoS)
capabilities. Pricing and
samples
are
available
upon inquiry with volume
production starting in Q1,
2011.
Micrel’s new switch family
directly addresses these
needs
coupled
with
energy efficiency enabling
compliance to important
green standards such as
ENERGY STAR. The flexible
configurability of the family
allows the requirements of a
variety of applications to be
satisfied based on a single
foundation system platform.
Micrel launched the KSZ8895/8875/8864
series. The devices are low-power, highly
integrated, 4/5-port Layer-2 switch-on-achip ICs. Leveraging Micrel’s latest green
physical transceiver and switch technology,
the product family achieves a 50 percent
reduction in power consumption compared
to the previous generation. Meeting the
Sophisticated QoS features such as tag and
port-based VLAN support and IPv6 priority
classification make these devices ideal for
today’s most demanding IP content based
applications in the digital home; IPTV, IP-STB
(set top box), VoIP (voice over IP), residential
gateways and GPON. The low emissions
and Micrel’s signature high reliability and
quality also make these devices suitable for
connectivity applications in the fast growing
industrial automation and automotive
markets.
The devices support a single 3.3V power
supply with an internal 1.2V LDO, with options
for 3.3V, 2.5V or 1.8V IO voltages. Further power
savings are supported by advanced power
management, including the device’s “Energy
Detect Power Down” mode. This mode is
activated when the cable is unplugged, and
the “slow oscillator” mode is activated when
the device is not in use.
The product family provides flexible host
processor and PHY interfacing via MII or RMII.
Flexibility is also provided in terms of copper
or fiber media interfaces. On-chip termination,
and internal generation of the 50MHz RMII
clock further reduces bill of materials cost and
enables a small package size (64-pin QFN for
KSZ8864RMN).
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
7
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5
COMPONENT FOCUS
New Freescale QorIQ processor helps to secure the network’s edge
Freescale
Semiconductor
Low-power,
cost-effective
offering
incorporates advanced security capabilities
for factory equipment, DVRs, storage
applications and more
As the reach of the world’s networks
extends further into new end-devices and
previously unconnected industries, network
security has become increasingly important
to consumers, businesses and other
organizations. To help secure the growing
number of network endpoints worldwide,
Freescale Semiconductor introduces the new
QorIQ P1010, an energy-efficient processor
incorporating advanced security technology
and designed for factory equipment, digital
video recorders, storage products and other
applications.
Targeting cost-sensitive endpoint applications,
the P1010 processor delivers up to 800 MHz
of performance and features operating
power as low as 1.1W. The device provides a
trust architecture platform that helps protect
against software intrusion and software
cloning by incorporating advanced end-toend code signing and intrusion prevention
capabilities.
The P1010 processor is the first QorIQ family
product member to integrate multiple FlexCAN
controllers that allow OEMs to implement
industrial protocols in factory automation
systems. It also incorporates SD/MMC, two
PCI Express® controllers, two SATA controllers
and three Ethernet controllers to address the
performance and market requirements of
NAS/DVR products.
In addition to industrial, storage and consumer
applications, the P1010 is also ideal for
cost-sensitive SOHO routers. The processor
incorporates software fast path acceleration
technology to deliver up to line rate
performance for IPv4.
“The P1010 is the newest member of the
broad QorIQ product family, which scales from
single-core offerings at 500 MHz to multicore
processors that deliver 2 GHz,” said Brett
Butler, general manager and vice president
of Freescale’s Networking Processor Division.
“While maintaining software compatibility
with PowerQUICC processors, the P1010
is a particularly versatile addition to the
QorIQ family, offering a compelling blend
of performance, lower operating power and
security for cost-sensitive markets.”
The P1010’s energy efficiency and broad set of
integrated peripherals can significantly reduce
overall system costs. The device is packaged in
a small (19mm x19mm) 425-pin TEPBGA1 with
a tight pitch at 0.8mm that enables a compact,
low-layer board and smaller overall footprint.
Low power dissipation allows for fan-less
designs. The incorporation of serial interfaces
reduces board size (SGMII Ethernet controllers)
and a 16/32-bit DDR3 memory controller
enables low-cost memory designs.
New QorIQ P1014 delivers additional cost
savings
For applications in which secure boot and
FlexCAN controllers are not required, Freescale
also offers the QorIQ P1014 processor, which is
a streamlined version of the P1010. The P1014
includes a 16-bit DDR3 memory controller
and is designed to deliver outstanding cost
benefits for single or dual bay NAS, DVR and
general purpose control applications.
The QorIQ P1010 and P1014 devices are part
of the Freescale Product Longevity program,
with 10 years of assured supply. For terms and
conditions, please see: www.Freescale.com/
productlongevity.
FAX
+65 6808 3886
EMAIL
[email protected]
8
Reader Response No.
Micrel Rolls Out New Family of High Current, Ultra Low Input Voltage
LDOs Powering Next Generation Low Voltage Cores
Micrel
Semiconductor
Micrel launched the MIC61150 and MIC61300,
1.5A and 3A LDOs designed for applications
that require a low voltage, high current power
6
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supply, generated from a single input supply.
The devices target point-of-load, ASICs, FPGAs,
microprocessors, networking cards and low
voltage post regulation applications. Samples
can be ordered on
line at: www.micrel.
com/ProductList.do.
The
new
highcurrent
LDOs
operate over an
input voltage range
of 1.1V to 3.6V.
The
MIC61150
and
MIC61300
feature
ultra-low
dropout voltages of
200mV and 350mV
respectively,
over
the entire operating
temperature range.
The regulators are
available as a 1V
fixed-output voltage
option or as an adjustable output voltage
option (adjustable down to 0.5V). The devices
are stable with low-ESR ceramic output
capacitors and include protection features
such as thermal shutdown, current limiting
and logic enable. The high-current LDOs are
offered in two different packages: a low-profile,
leadless 10-pin 3mm x 3mm MLF® and a 10pin ePad MSOP. The devices have an operating
junction temperature range of -40°C to +125°C.
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
9
DESIGN NOTES
Getting the most from the new lighting reference design kit
Freescale
Semiconductor
selected LED to be adjusted using one of three techniques. The
default window, when an LED is selected, will offer sRGB colour-space
control, allowing a colour balance to be selected by touching within
the colour square and adjusting the slider to the right of the colour
square. A translation from sRGB colour space to CIE 1931 colour space
coordinates will also be calculated and displayed.
The next tab, CIE 1931 Colour Space, is selected, will display the standard
horseshoe-shaped CIE colour-space chart. A smaller triangle within this
colour space shows the gamut of colours that each particular LED or
LEDs can support.
As before, colour selection will be made by touching within the colour
space and then varying the luminance with the slider provided on the
right of the screen. Colour-space and luminance values may also be
entered directly via x, y and Y fields presented alongside the CIE colourspace chart.
Fig. 1: The upgraded Lighting Reference Design kit will be used
with the Tower System environment
This design note from Freescale Semiconductor discusses how to
use the latest Lighting Reference Design kit for LED lighting, see
page 20, to start new designs and optimise LED settings using
either the Digitally-Addressable Lighting Interface (DALI) or
DMX512-A wired protocols, or ZigBee® wireless control.
The Lighting Reference Design kit is being upgraded to help designers
create innovative solutions as markets for solid-state lighting continue
evolving rapidly. The features added will include support for wireless
LED control, enhanced design software, and integration with the
Tower System development platform (Figure 1). The new hardware
being created for the Tower System will include a controller module
built using a Kinetis ARM® Cortex™-M4 MCU, a DALI/DMX512-A/Zigbee
communications board, and LED-driver boards featuring the MC13213
MCU and integrated IEEE 802.15.4 transceiver. The controller will
manage multiple LED-driver boards, using either DALI or DMX512-A
wired protocols or the ZigBee based wireless Home Automation
Network (HAN) profile within the ZigBee specification. A switch on
the LED-communications board will communicate the choice of DALI,
DMX512-A or ZigBee to the Tower-based lighting-control application.
The third tab will enable direct control of each LED by setting values
for PWM dimming signals on a per-channel basis. This can only be
available when using DMX512-A or ZigBee lighting protocols, as
existing DALI protocols only allow acknowledgements - not data – to
be sent from a light. Although these will be represented as 8-bit values
in the eGUI they are actually 16-bit values within the MC13213 MCU,
and will produce smooth colour and luminance control of each LED.
The reference design will also support LED thermal management. Each
LED daughter board will position a thermistor as close as possible
to the LED array. Real-time thermistor data collected about once per
second via the MC13213’s ADC will allow the LED-controller board
to adjust the power delivered to each LED and so maintain junction
temperatures within predetermined limits, preserving the LED’s
lifespan.
Again for DMX512-A and ZigBee systems only, a fourth tab within the
eGUI will allow this sensor data to be read back and displayed. This data
feedback will use the DMX512-A Remote Device Management (RDM)
protocol and ZigBee Home Automation Network (HAN) protocol, both
of which will be supported in this update to the lighting reference
design.
The DALI specification allows for a theoretical maximum of 125 LEDs to
be attached, whereas the DMX512-A specification allows control of up
to 512 LEDs. The ZigBee specification allows for 250 LEDs, while ZigBee
Pro supports 1000 LEDs. Once the communication protocol is chosen
the lighting controller will scan the system to see how many LEDs are
present. During this scan each LED-driver board reports the type and
number of LEDs present. For the DALI-based system, which operates
at 1200bits/s, this can take several seconds. For DMX512-A systems,
which operate at 250kbits/s, the scan is almost instantaneous.
For the ZigBee based systems, which also operate at 250kbits/s, the
scan again is almost instantaneous. Each LED-driver card will have
ZigBee Full-Function Device (FFD) router capability, allowing each LEDbased light to communicate wirelessly with its nearest neighbour. This
extends the potential wireless coverage over hundreds or thousands
of metres from the original lighting-controller system.
Fig. 2: Sensor feedback with DMX512A- or ZigBee-based control
After the lighting controller discovers all the LED subsystems, the eGUI
touchscreen-LCD panel will allow LEDs to be selected individually
to open a new window enabling the colour and luminance for the
www.futureelectronics.com
7
APPLICATION SPOTLIGHT
Dimmer-compatible LED drivers maximise feature integration and
flexibility
NXP
Semiconductors
The NXP Semiconductors SSL210x family
comprises three LED drivers for
solid-state lighting and
incandescentbulb
replacement
covering a wide
range
of
power
ratings and industrystandard form factors.
The SSL2101 and SSL2102
are fully integrated drivers
suitable for use in lamps up
to 10W and 25W respectively.
By
integrating features such as a
highvoltage power switch, circuitry to supply a
phase-cut dimmer, and support for
direct start-up from mains voltage, these
devices minimise the number of external
components required. This makes them
suitable for use in compact lamps with
closed casings, such as GU10 and E27 units. In
addition, both strong and weak bleeders are
implemented on-chip, providing the latching
and hold-current maintenance functions
necessary to ensure consistent operation of
the dimmer.
The SSL2101 has completed 8000
hours of actual testing time
at 150°C, making it the first
driver to demonstrate lifetime
performance matching that
of an LED emitter.
The SSL2103 is suitable for
lamps at higher power
levels in industry-standard
form factors such as PAR20, PAR30
and PAR38. It is compatible with a wider
range of dimmers, and can also be used with
non-dimmable lamps. The device achieves
this enhanced flexibility by providing circuitry
to control an external power switch, hence
covering a wider range of power ratings, as
well as circuitry to control external bleeder
transistors enabling extended dimmer
interoperability.
All the devices feature integrated logarithmiccorrection circuitry, which matches humaneye response and allows deep dimming to
below 1%.
FEATU RES :
ƒƒ Valley-switching circuitry
ƒƒ Magnetisation detection
ƒƒ Over-temperature protection
ƒƒ Over-current protection
ƒƒ Short-winding protection
A P P L I C AT I O NS :
ƒƒ SSL retrofits
ƒƒ LED spotlights
ƒƒ LED down-lights
ƒƒ LED strings
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
10
LED driver delivers compromise-free performance with phase-cut
dimmers
National
Semiconductor
The National Semiconductor LM3450 highbrightness LED driver maintains flickerfree illumination when used with a phasecut dimmer but, unlike most other drivers,
does not reduce the LED-dimming range
or waste power deliberately to prevent the
dimmer misfiring.
Conventional drivers for use with phase-cut
dimmers are able to decode the chopped
8
www.futureelectronics.com
waveform to dim the LED, but do not always
meet the minimum current requirement
to prevent the dimmer from shutting off
or misfiring during operation. This causes
inaccurate decoding of the phase angle
resulting
in
flicker,
particularly at very low
dimming
levels.
Many
drivers compensate by
reducing the dimming
range or wasting power
simply to keep the dimmer
from misfiring.
The LM3450 LED driver
implements hold circuitry
to adjust the current
through the phase dimmer
dynamically. In combination
with this circuitry, a
programmable, intelligent
dimming decoder ensures smooth, consistent
illumination across the full dimming range.
Working together, these innovations provide
the most efficient and uniform dimming
performance in the industry. In addition, active
power-factor correction is built in to ensure a
high power factor complying with residential
and commercial Energy Star standards in
North America and the European standard
EN61000-3-2 Class C. The device is a member
of National’s PowerWise® energy-efficient
product family, and is optimised for use in
high-performance, phase-dimmable LED
fixtures from 10W to 100W.
F EAT UR ES :
ƒƒ 500Hz PWM output
ƒƒ Programmable dimming range
ƒƒ Smooth dimming transitions
ƒƒ Low-power operation
ƒƒ Short-circuit and over-voltage protection
A P P L I C AT I O NS :
ƒƒ Dimmable downlights and accent lighting
ƒƒ Indoor and outdoor illuminations
ƒƒ Power-supply PFC circuitry
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
11
APPLICATION SPOTLIGHT
Microchip’s New Digital LED Lighting Development Kit Makes it Easy to
Add Intelligence and Improve Efficiency in LED Lighting Applications
Microchip
Free Reference Design and dsPIC33 ‘GS’
Family of Digital Signal Controllers Helps
Lower Product Costs, Reduce Size and
Improve Efficiency
Microchip new Digital LED Lighting
Development Kit helps LED lighting designers
who are challenged to meet the rapidly
expanding demand for green, smart energy
technologies while differentiating their
products. This development kit enables
designers to quickly leverage the capabilities
and performance of the dsPIC33 ‘GS’ series of
Digital Signal Controllers (DSCs), to develop
LED lighting products. The dsPIC33 ‘GS’ DSC
and this reference design
allow developers to create
a 100% digitally controlled
ballast
function,
while
including advanced features
such as dimming and color
hue control. The dsPIC33 ‘GS’
DSCs can support an entire
system implementation for LED
lighting products, including
power-conversion circuits, such
as AC-to- DC and DC-to-DC
conversion, along with functions
such as Power Factor Correction
(PFC), which are necessary for
a complete product and lower
the overall system cost.
This reference design enables our customers to
develop LED lighting products that are 100%
digitally controlled and are very cost effective.
By using the flexible dsPIC33F “GS” series of
DSCs, customers can easily customize and
differentiate by making simple modifications
to the control software.
Benefits offered by the digital-power
techniques in this reference design and the
dsPIC33 ‘GS’ series of DSCs include:
• Reduced System Cost via higher integration
• Higher Efficiency using digital-control
techniques
• Flexible and reusable designs
• Advanced features implemented in
software
Additional key features of Microchip’s Digital
LED Lighting Development Kit include:
• Color control for RGB LEDs
• Flexible input voltage support, including
both Buck and Boost topologies
• Fully dimmable
• Full digital control
• Fault protection
• Fully
controlled
with
a
single
dsPIC33FJ16GS504 DSC
LED lighting applications supported by
Microchip’s LED Lighting Development Kit
include dimmable LCD backlighting, signage,
LED replacement of fluorescent tubes and
incandescent bulbs, architectural lighting, and
automotive lighting applications. Automotive
lighting products include exterior applications,
such as headlights, daytime running lights and
signal lights.
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
12
Lumex QuasarBrite™ 4-Leaded RGB LEDs
Lumex
not seen in most standard products. This
product boasts a wide view angle, 120˚, not
typically seen in through hole products. This
set up is ideal for applications that require a
matrix of high intensity output with a wide
view angle that maximizes pixel pitch in
indoor sign applications.
MA R KE T:
ƒƒ Electronic Signage
ƒƒ Automotive
ƒƒ Industrial controls
ƒƒ Medical
ƒƒ Small Space Lighting
FE ATURES :
ƒƒ 120˚ viewing angle (versus a traditional 30˚ viewing angle from other through-hole LEDs)
ƒƒ Superior thermal design leadframe
ƒƒ Enhanced off-the-board thermal design
ƒƒ Compact 5mm package size
APP LIC AT I O NS :
With a market-leading thermal design, the
new QuasarBrite 4-leaded RGB LED combines
a compact package size and an in¬novative
lead frame design for outstanding heat
dissipation. Additionally, the off-the-board
design allows for an increase in convection
ƒƒ High output signage (close proximity)
ƒƒ Decorative lighting
ƒƒ Indicator lighting
ƒƒ Portable medical devices
ƒƒ Multicolor application
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
13
www.futureelectronics.com
9
APPLICATION SPOTLIGHT
Non-dimming CFL drivers raise performance and reliability
NXP
Semiconductors
The
UBA2211
family
from
NXP
Semiconductors provides a selection of
highly integrated CFL drivers enabling
improved quality of light at lower cost in
non-dimming applications.
The family of four drivers comprises one
generic device optimised for use with external
switches and compatible with 230V or 110V
mains voltages, as well as the UBA221A,
UBA221B and UBA221C 230V-only devices
for use with 11W, 18W or 23W CFLs
respectively.
The non-generic drivers
provide half-bridge transistors
on-chip and implement RMScurrent control to maintain
constant half-bridge lamp
current and IC dissipation.
start capability resulting in faster light-output
run-up. Moreover, by incorporating NXP’s
GreenChipTM technology to maximise energy
savings, the drivers also deliver an average 5%
improvement in energy efficiency compared
to alternative CFL drivers.
By also implementing
current-controlled
preheating alongside the fully integrated
CFLdriving functions, UBA2211 drivers
enable more compact fluorescent lamp
designs, highly efficient power conversion,
and extended CFL lifetimes in the range of
12,000 to 15,000 hours. The current-controlled
preheat function satisfies a key
requirement of the EU directive on
energy-saving lighting, which
effectively bans incandescent
bulbs for ordinary lighting.
There is also a glow-time
control
feature,
which
allows use in non-preheat
applications by minimising
electrode damage just after
ignition of the lamp.
F EAT UR ES :
ƒƒ Integrated bootstrap diode
ƒƒ Integrated high-voltage supply
ƒƒ Lamp power independent from mains
voltage variations
ƒƒ Saturation-current protection
ƒƒ Over-temperature and over-voltage safety features
ƒƒ System shutdown at CFL end of life
A P P L I C AT I O NS :
ƒƒ Indoor and outdoor non-dimming CFLs up to 25W
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
14
Among the key performance benefits on
offer, the UBA2211 family provides quick-
High Efficiency LED Smart Driver
Microchip
9-13 volt systems easily adapt to a Smart
Driver Circuit to drive High Power LEDs using
the MCP1702, MCP1652 and a PIC10F202. The
MCP1702 directly connected to the 12 volt
source creates a 5 volt bias supply capable
of delivering 250 mA to the intelligent boost
control circuit.
The LEDs are powered by the source voltage
boosted by the MCP1652, minimizing the
current requirements for the 5V power
system. A PIC10F202 adds intelligence to
the circuit providing a means for thermal
protection, load open and short circuit
protection as well as the capability of a user
interface to control dimming and other
features.
Low Battery Detect enables the designer
to determine a trip point for a low battery
condition to make “smart” adjustments to
the circuit function with the PIC10F202. The
Power Good Indication enables the designer
to determine when output voltage conditions
are correct.
Literature on the Web
• MCP1650/51/52/53 Data Sheet, DS21876
• AN980 – Designing a Boost-Switching
Regulator with the MCP1650, DS00980A
• DG10 – Power Solutions Design Guide,
DS21913B
MCP165X Driver Devices
Device
MCP1650
Special Features
Package
Standard Device
8-Pin MSOP
MCP1651
Low Battery Detect
8-Pin MSOP
MCP1652
Power Good Indication
8-Pin MSOP
MCP1653
Low Battery Detect and
Power Good Indication
10-Pin MSOP
LED Smart Driver with 12V Input
9-13V DC
MCP1703
5V LDO
VIN
EXT
MCP1652
Dimming
Output
Control
CS
NC
PG
FB
10 LED String
700 mA, 34V DC
PIC10F202
User
Interface
SHDN
GND
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
10
www.futureelectronics.com
15
APPLICATION SPOTLIGHT
Vishay Intertechnology Releases Metal-Core-Based, Cold White LED
Power Modules Assembled With 12, 24, or 36 High-Brightness LEDs
and Featuring Color Temperature Range of 5000 K to 7000 K
Vishay
with 12, 24, or 36 high-brightness LEDs. The
new VLSL40xxA is designed for flexible use by
utilizing optional special reflectors to adjust
the modules’ emission characteristics, while
the VLSL50xxA features a clear silicone lens for
a butterfly-shaped radiation characteristic.
VLSL40xxA Available With VLSL-REFL01
Reflector to Adjust Emissions, while
VLSL50xxA Features Butterfly-Shaped
Radiation Characteristic
Vishay announced two metal-core-based, cold
white LED power modules, each assembled
Optimized for illumination in streetlights,
internal building lighting, tunnel lights, and
general lighting applications, the VLSL40xxA
and VLSL50xxA offer a color temperature
range of 5000 K to 7000 K. Both devices feature
a shiny white surface and a metal-core, singleside PCB with a Cu thickness > 0.75 µm. Each
module includes a conductive top layer with
a minimum Cu of 18µm and a 63-µm prepreg
1080 FR4 type isolation layer.
The VLSL40xxA is available with the VLSLREFL01 reflector, which is composed of an Alalloy material with a non-high-polished surface.
By using different reflector combinations, the
emission in one direction can be adjusted in a
typical range of 120° to 55°. The clear silicone
lens of the VLSL50xxA allows for a ± 35° vertical
and ± 60° horizontal angle of half intensity.
The VLSL40xxA and VLSL50xxA are based on
InGaN technology and provide a maximum
current of 700 mA. The LED modules feature
standard solder mask material, and offer
luminous flux and color binning. The devices
provide ESD withstand voltage up to 2 kV in
accordance with JESD22-A114-B and comply
with ROHS 2002/95/EC.
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
16
MCP1630 and MCP1631 High-Speed PWM Controllers
Microchip
The MCP1630 and MCP1631 offer another
method that can be used to generate high
speed PWM signals for high power LED drivers.
The MCP1630 is an 8-pin device that contains
the components needed to generate an
analog PWM control loop, including an error
amplifier, comparator and a high current
output pin to drive a power transistor.
The MCP1630 is designed to be used with a
MCU that provides a reference clock source.
The MCU controls the PWM frequency
and maximum duty cycle. The switching
frequency can be up to 1 MHz, depending on
the application requirements. The MCU can
also control the reference input for the error
amplifier when dimming or soft start functions
are required. Multiple MCP1630 devices can be
attached to a MCU to support multiple power
channels.
The MCP1630 can be used to solve advanced
power supply issues. When multiple MCP1630
devices are used, phase offsets can be applied
to each clock input to reduce bus current
ripple. For applications that are sensitive to EMI,
dithering can be applied to the clock signal to
reduce radiated energy at a given frequency.
The MCP1631 is a 20-pin device which, in
addition to the MCP1630 includes an internal
5V or 3.3V regulator, shutdown control,
overvoltage protection, oscillator disable and
1x and 10x gain amplifiers
MCP1630 Boost Mode LED Driver
9-13V DC
5V
5V
PIC12HV615
MCU
User
Interface
Clock
MCP1630
PWM
Controller
10 LED String
700 mA, 34V DC
Thermal Feedback
www.futureelectronics.com
MCP1631HV
Digitally
Controlled
Programmable Current Source Reference
Design (MCP631RD-DCPC1)
This board provides
a
SEPIC
DC-DC
converter for power
LED
and
battery
charging applications.
The input voltage
range is 3.5-16 VDC
and the maximum
power output is 8.5W.
Reference
Current Feedback
12
MCP9700
Temp Sensor
MCP1630 Boost Mode LED Driver
Demonstration Board (MCP1630DM-LED2)
This demo board is a
step-up, switch-mode,
DC-DC
converter
used for power LED
applications.
The
demo board provides
a 350 mA or 700 mA
constant
current
source with a jumper
selection. The input operating voltage range
is 9-16 VDC and the board can supply up to
30W to a string of power LEDs.
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
17
APPLICATION SPOTLIGHT
Lighting Reference Design kit adds wireless control and streamlines
development
Freescale
Semiconductor
Freescale Semiconductor is updating its
Lighting Reference Design discussed in
FTM1001, delivering increased functionality
and ease of use by adding ZigBeeR-based
wireless control of three (RGB) or four (RGBW
or RGBA) LEDs to the existing DALI and
DMX512-A/RDM LED protocols, and also by
using the modular Tower System development
platform.
Also updated is the colour-balance software
that currently controls the colour balance
between the three or four LED colour clusters
within the lighting system. The software will
be updated to allow colour-temperature
selection, such as from warm white to cool
white.
The Windows-based PC GUI that allowed the
user to select a colour and luminosity per LED,
via either the sRGB or CIE 1931 colour spaces,
will be integrated into the Freescale Tower
development tool using eGUI, Freescale’s
royalty-free embedded graphics software. This
will remove the need for a separate PC and will
create a self-contained lighting-control system
for LED-based lights.
The embedded hardware will include an
LED-controller board built to run within
the Freescale Tower System. The controller
board features a Freescale Kinetis ARM®
Cortex™-M4 MCU (MK60N512VMD), and will
connect to a separate DALI/DMX512-A/ZigBee
communications board via the Tower System
elevator boards. This arrangement will be able
to control multiple driver boards for single or
multiple LED clusters.
The Kinetis MCU will also drive a touchscreenLCD daughter card attached to the side of
the Tower system. The Kinetis MCU will run
the Freescale MQX™ RTOS (available free-ofcharge) using one execution thread to run the
eGUI driving the LCD panel and other threads
to handle wired or wireless communications
with the LED-based lights in the system.
F EAT UR ES :
ƒƒ 1.5A LED-driver boards based on MC13213 MCU
ƒƒ LED daughtercards with up to four high
brightness LEDs
ƒƒ 1000-LEDs capacity with ZigBee Pro
communications
ƒƒ Support for LED thermal management
ƒƒ Complete documentation and
downloadable C source code
A P P L I C AT I O NS :
ƒƒ Development of LED lighting including:
• Domestic lighting
• Industrial lighting
• Stage lighting
• Street lights
• Emergency lighting
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
18
AS1119 drives 144 LEDs, creating colorful and smooth animations
while extending battery life, features best dimming control and onchip charge pump
austriamicrosystems
The AS1119 is the most advanced and
smallest LED dot-matrix driver (channels vs.
PCB space) available. The AS1119 drives 144
LEDs but requires only 9 mm² PCB space,
reduces external component count, reduces
connector pin count and requires fewer PCB
layers. Benefits for end users include up to
80% longer battery lifetime, more colorful
effects and smoother running animations.
The AS1119 is targeted for dot matrix displays
in mobile phones, personal electronics and
toys.
The AS1119 leads the industry by driving
the most LEDs, each with an 8-bit dimming
control and no external resistor required.
Additionally, an 8-bit analog current
control allows fine tuning of each matrix
to compensate for different brightness of
different colors, or to adjust the white balance
on RGB LEDs. The AS1119 incorporates 6
frames of memory for small animations or
for use as a buffer to reduce host processor
load, thereby saving energy and precious
processing time. The AS1119 also extends
battery life by including an on-chip 320 mA
charge pump which is required when LEDs
require a higher voltage than the battery can
supply, allowing continuous operation even
under low battery voltage conditions.
Other features include control via a 1 MHz I²C
compatible interface, open and shorted LED
error detection, and low-power shutdown
current. Two modes of operation are offered
making the AS1119 a very flexible part to
design with -- single/bicolor mode to drive
the maximum number of LEDs in two 8x9
matrix, or the RGB mode offering three
times 5x6 matrix, allowing white balance by
adjusting the analog current in each matrix.
The AS1119 is the most advanced and
smallest dot matrix LED driver available on
the market. It enables creative light design
with the longest battery lifetime through our
intelligent power management for mobile
applications. It allows our customers to create
unique looking devices while minimizing
design effort through the AS1119’s flexibility.
The AS1119 also saves space & cost by
reducing external component count,
reducing connector pin count and the
number of PCB layers.
Only 18 lines are required to drive all
144 LEDs. This is accomplished with
austriamicrosystems’ multiplexing technique
called cross-plexing. This allows reducing the
line count on the PCB as well as fewer pins on
the connectors, saving space & costs.
The AS1119 is available in a 36-pin WLCSP 3x3 mm package and operates over a
temperature range of -40 to +85 °C over a
wide 2.7 to 5.5 V power supply range.
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
19
www.futureelectronics.com
13
APPLICATION SPOTLIGHT
High-Brightness LED Driver with Integrated MOSFET and High-Side
Current Sense
FEATU RES :
Micrel
Semiconductor
side current sensing and on-chip currentsense amplifier delivers LED current with ±5%
accuracy. An external high-side current-sense
resistor is used to set the output current.
The MIC3202 offers a dedicated PWM
input (DIM) which enables a wide range
of
pulsed
dimming.
High-frequency
switching operation of up to 1MHz allows
the use of smaller external components,
minimizing space and cost. The MIC3202
offers a frequency dither feature for low-EMI
applications.
The MIC3202 is a hysteretic, step-down,
constant-current, High-Brightness LED (HB
LED) driver. It provides an ideal
solution for interior/exterior
lighting, architectural and
ambient lighting, LED
bulbs, and other general
illumination applications.
The MIC3202 is well
suited for lighting
applications requiring
a wide-input voltage
range. The hysteretic control gives
good
supply rejection and fast response during
load transients and PWM dimming. The high-
The MIC3202 operates over a junction
temperature from -40ºC to -125ºC and is
available in an 8-pin e-PAD SOIC
package. A dither disabled
version MIC3202-1 is also
available in the same package
as the MIC3202.
D a t a s h e e t s
and
support
documentation can
be found on Micrel’s
web site at: www.micrel.com.
ƒƒ 6V to 37V input voltage range
ƒƒ High efficiency (>90%)
ƒƒ ±5% LED current accuracy
ƒƒ MIC3202: Dither enabled for low EMI
ƒƒ MIC3202-1: Dither disabled
ƒƒ High-side current sense (up to 1A)
ƒƒ Dedicated dimming control input
ƒƒ Hysteretic control (no compensation
required)
ƒƒ Up to 1MHz switching frequency
ƒƒ Adjustable constant LED current
ƒƒ Over-temperature protection
ƒƒ -40ºC to +125ºC junction temperature range
A P P L I C AT I O NS :
ƒƒ Architectural, industrial, and ambient
lighting
ƒƒ LED bulbs
ƒƒ Indicators and emergency lighting
ƒƒ Street lighting
ƒƒ Channel letters
ƒƒ 12V lighting systems (MR-16 bulbs, under-
cabinet lighting, garden/pathway lighting)
FAX
+65 6808 3886
EMAIL
[email protected]
20
Reader Response No.
LED drivers support thermal dimming feedback and dynamic efficiency
optimisation
National
Semiconductor
The LM3464 and LM3464A from National
Semiconductor are high-voltage, 4-channel
LED drivers that support dimming for
thermal-management purposes in addition to
conventional brightness adjustment. They also
feature Dynamic Headroom Control (DHC),
which optimises the voltage supplied to the
LED strings for minimum losses.
14
www.futureelectronics.com
The LM3464 has an input-voltage range from
12V to 80V, while the LM3464A can accept input
voltages up to 95V. As a feature of each device,
high-speed PWM dimming allows flexible
brightness control while minimising any
variations in colour temperature. The
PWM frequency is programmed using an
external resistor.
An analogue dimming input is provided,
which can be connected to a sensor such
as an ambient light sensor for brightness
control. Alternatively a temperature
sensor such as a PTC or NTC device can be
connected directly to the analogue input.
This allows LEDs to be dimmed in order
to manage the temperature of the heatsink or
the system chassis. When analogue dimming is
used, the driver maintains minimum-duty-cycle
control. The duty cycle is programmed by an
external resistor.
The built-in DHC feature provides an output
that can be used to adjust the voltage of the
external power supply dynamically. This allows
the system to supply the minimum voltage
needed to maintain every string current in
regulation, thereby optimising efficiency
and reliability as LED forward voltage varies
according to temperature or process-related
factors.
F EAT UR ES :
ƒƒ 98% peak efficiency
ƒƒ High channel-to-channel accuracy
ƒƒ Fault detection
ƒƒ LED open- or short-circuit protection
ƒƒ Over-temperature protection
ƒƒ Thermal shutdown
A P P L I C AT I O NS :
ƒƒ Street lights
ƒƒ General solid-state lighting solutions
ƒƒ Display backlighting
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
21
Bringing the Power to Light™
with Simple HBLED Drivers
High Brightness LED Drivers with High-Side Current Sense
D
VIN
L
RCS
LED1
D
VIN
CIN
L
RCS
LEDN
LEDs
CIN
LX
CS
VIN
EN
PGND
EP
VIN
VCC
EN
MIC3202
DIM
DRV
CS
CVCC
DIM
AGND
RG
MIC3203
VCC
CVCC
PGND AGND
Applications
Landscape Lighting
MR-16 Bulbs
The
rapid growth of LED lighting applications in
commercial, industrial and automotive markets has led
to a wide variety of technical challenges for LED Drivers.
Micrel is meeting these challenges with simple
step-down LED Drivers such as the MIC3202 and MIC3203.
The MIC3202 is a hysteristic step–down LED Driver
with integrated MOSFET capable of driving up
to 10 HBLEDs with constant currents up to 1A in a
thermally enhanced exposed pad SOIC-8L package.
The MIC3203 is a hysteristic step–down LED Driver with
an external MOSFET capable of driving up to 10 HBLEDs
with power levels up to 40W in a SOIC-8L package.
For more information, contact your local Micrel sales
representative or visit Micrel at: www.micrel.com/ad/
leddrivers.
© 2011 Micrel, Inc. All rights reserved.
Micrel and Innovation Through Technology registered trademark of Micrel, Inc.
Bringing the Power to Light is a trademark of Micrel, Inc.
Architectural Lighting
Ideal for use in:
 12V Lighting Systems (MR-16 Bulb, Under Cabinet Lighting,
Garden/Pathway Lighting)
 Architectural, Industrial, and Ambient Lighting
 LED Bulbs
 Indicators and Emergency Lighting
 Street Lighting
 Channel Letters
Part
Number
Input
Voltage
Output
Current
PWM
Dimming
Dithering
Package
MIC3202
6V to 37V
1A
Yes
Yes
EP SOIC-8L
MIC3202-1
6V to 37V
1A
Yes
No
EP SOIC-8L
MIC3203
4.5V to 42V
Controller
Yes
Yes
SOIC-8L
MIC3203-1
4.5V to 42V
Controller
Yes
No
SOIC-8L
www.micrel.com
APPLICATION SPOTLIGHT
LED controller with hysteretic-mode control enhances transient
response, simplifies design
Micrel
Semiconductor
an external power MOSFET, allowing use in a
wide range of applications from low-voltage
lighting to line-powered incandescent-bulb
replacement.
The hysteretic-mode control scheme
employed uses an error comparator,
instead of an error amplifier, to
maintain the inductor current within
a desired window. This eliminates
the need for an oscillator and loop
compensation, thereby allowing
fast response to transients, reducing
component count, and simplifying
design. The MIC3203 also eliminates
any potential for instability since loop
compensation is not required.
The Micrel Semiconductor MIC3203
LED-driver controller targets lighting
applications characterised by load and
line variations that demand fast transient
response and a wide input-voltage range.
The MIC3203 is able to regulate the
LED-driving current within ±5% of the target
value throughout variations in input voltage
and load conditions. The drive current is set by
connecting a high-side current-sensing resistor
to the current-sense input.
The driver accepts input voltages from 4.5V
to 42V and generates the gate-drive signal for
A dedicated pin is provided for PWM dimming,
allowing brightness control from 1% to 99%.
A separate Enable pin gives the flexibility to
enable or disable the output independently.
The device switches at up to 1.5MHz, allowing
the use of small external components, and
features frequency dither to minimise EMI. A
dither-disabled version, the MIC3203-1, is also
available in the same package style.
F EAT UR ES :
ƒƒ Peak efficiency over 90%
ƒƒ 1μA shutdown current
ƒƒ 8-pin SOIC package
ƒƒ Operating temperature range:
-40°C to 125°C
ƒƒ Over-temperature shutdown protection
ƒƒ Adjustable constant LED current
A P P L I C AT I O NS :
ƒƒ Architectural and industrial lighting
ƒƒ MR16 bulb replacement
ƒƒ Automotive exterior and interior lighting
ƒƒ Indicators and emergency lights
ƒƒ 12V lighting systems
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
22
Driver boosts CFL performance for next-generation energy-saving
lighting
NXP
Semiconductors
The NXP Semiconductors UBA2028 is a
highly integrated driver for dimmable
Compact Fluorescent Lamps (CFLs),
enabling lamp producers to
deliver more consumer-friendly
CFLs offering improved light
quality, faster warm-up,
improved
dimming
and longer product
lifetimes.
The UBA2028 enables designers to
respond to market demands for better quality,
functionality and performance from CFL lamps.
By delivering an integrated chip solution to
replace standard discrete implementations
in electronic ballasts, it supports more
compact designs offering highly efficient
power conversion and extended CFL lifetimes
beyond 15,000 hours. On-chip features include
16
www.futureelectronics.com
a 600V Metal-Oxide- Semiconductor Transistor
(MOST) half-bridge power circuit, a dimming
function, a high-voltage level-shift circuit, an
oscillator function, lamp-voltage monitoring,
current-control circuitry, a timer function and
protection features.
In addition, the UBA2028 provides
true
dimming
capabilities.
This results in a smoother
dimming experience with no
flickering or noise, and allows
an unprecedented dimming
range down to 10% of full light
intensity. A power-down function is
also available.
Overall, the advanced features of the
UBA2028 will enable CFL lamps to deliver
performance indistinguishable from that of
incandescent bulbs, allowing consumers to
take advantage of the energy savings offered
by CFLs without sacrificing quality of light.
F EAT UR ES :
ƒƒ Peak efficiency over 90%
ƒƒ 1μA shutdown current
ƒƒ 8-pin SOIC package
ƒƒ Operating temperature range:
-40°C to 125°C
ƒƒ Over-temperature shutdown protection
ƒƒ Adjustable constant LED current
A P P L I C AT I O NS :
ƒƒ 280mA maximum steady-state current
ƒƒ 1.5A maximum ignition current
ƒƒ Adjustable preheat time and preheat current
ƒƒ Single ignition attempt
ƒƒ Adaptive non-overlap time control
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
23
APPLICATION SPOTLIGHT
Digital-power controllers unlock performance, flexibility
and energy-efficiency gains
Microchip
Microchip’s dsPIC33F GS family of digital
signal controllers is optimised for highperformance digital-power control, and
enable part-count reduction as well as
greater performance,
flexibility and
energy efficiency in applications such as
power supplies, renewable-energy systems
and advanced lighting.
The controllers can be configured for a variety
of buck- or boost-converter topologies, giving
designers the freedom to optimise for specific
product applications. A single dsPIC33F GS
device can support an entire
system
implementation
for LED lighting products,
including power conversion
and PFC alongside digitalballast functions such as
dimming and colour-hue
control.
With 32kbyte to 64kbyte
of on-chip Flash, family
members have significantly
larger memory capacity
than previous generations of
digital-power controllers. This
enhances support for 100%
digitally-controlled lighting offering advanced
features and the ability to customise and
differentiate by modifying software.
Intelligent power peripherals minimise
demands for processor intervention and
support the ability to handle the real-time
needs of high-speed current-mode control.
These include up to 18 topology-flexible PWM
channels, up to four high-speed comparators
with programmable references, and up to two
10-bit ADCs having 4Msample/s capability
for low latency and high-resolution control.
F EAT UR ES :
ƒƒ 16-bit 40MIPS CPU
ƒƒ Up to three 16/32-bit timers
ƒƒ Internal high-precision oscillator
ƒƒ UART, SPI and I2C ports
A P P L I C AT I O NS :
ƒƒ LED-lighting controllers
ƒƒ Digital HID and fluorescent lamp ballasts
ƒƒ Uninterruptible power supplies
ƒƒ AC/DC power conversion
ƒƒ DC/DC converters
ƒƒ Intelligent battery chargers
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
24
Exar Releases Industry’s Highest Intensity Supercapacitor LED Flash
Driver
Exar
The XRP6840 -- up to 4.3Amps -- Extends
the Reach of LED-Based Flash Solutions into
Leading-Edge Consumer Applications
Exar unveiled the XRP6840, the industry’s
highest intensity LED flash driver with full
management of supercapacitor based flash
technology. The XRP6840 delivers up to 4.3Amps
flash pulse which is ideal for high resolution
mobile phone cameras and standalone digital
cameras.
Increased resolution in camera phones
and standalone digital cameras requires a
high intensity LED flash current beyond the
capabilities of standard lithium-ion batteries.
The XRP6840 alleviates such peak current
requirements by constantly sourcing a low
controlled current from the system’s battery
to charge a supercapacitor which in turn
provides the power for peak load functions.
Charging and discharging parameters of the
supercapacitor are completely managed by
the XRP6840 and fully programmable via an
industry standard I2C interface. The XRP6840
supports high peak current functions in battery
operated portable systems while significantly
increasing battery life.
Key Product Features
The XRP6840 combines and manages in a
single device all the functions necessary to
implement a supercapacitor based LED flash
driver solution. Supporting programmable
current in torch and flash modes, the device
comes in both two and three channel versions
for increased design flexibility and supports up
to 600mA of constant charging current. Built
around tri-mode charge pump architecture
and operating at 2.4MHz, the XRP6840 provides
inrush current control and device protection
circuitry while a standard I2C interface provides
a seamless integration into any system.
FAX
+65 6808 3886
EMAIL
[email protected]
Reader Response No.
25
www.futureelectronics.com
17
TECHNICAL VIEW
Improving comfort and cost savings with intelligent lighting
Growing interest in solid-state lighting is not only creating a need for
LEDs offering greater light output, reliability and quality, but is also
driving demands for cost-effective and interactive LED systems that
will deliver further reductions in energy consumption. In this article,
Future Lighting Solutions’ Regional Technical Manager Martin Schiel
and Technical Marketing Engineer Osama Mannan describe how an
intelligent lighting system that incorporates monitoring, control, and
a communication network can enable lighting designers to meet this
goal.
Intelligent Control
Many indoor and outdoor lighting applications, such as the office
downlights and municipal lighting, as well as display signs, parking
lights, architectural lights, garden lights and many other applications
are now making use of the unique advantages of LED technology.
These advantages include not only greater efficacy and quality
of light compared to conventional incandescent lamps, but also
the potential for various innovative methods of control. Whereas,
conventionally, light fixtures have been simply switched ON and OFF,
functionalities such as dimming, sensor interaction, and the ability
to control fixtures collectively or separately are quickly becoming
standard specifications. An intelligent lighting system is able to meet
such requirements.
One approach is to start from the basic semiconductor-IC level and
progressively build a solution that is tailored to the exact needs of the
application.
Another approach is to work with an off-the-shelf product, which
may come in the form of a black box that includes all necessary
components and is ready to be used instantly. This can be an
intelligent LED driver, a multi-functional remote control, or any device
that can be easily integrated with existing luminaires.
An intermediate option is to employ sub-systems that are not entirely
a finished product but are also flexible enough to provide the basis
for a customised control system.
communicate with gateways enabling wireless control of multiple
fixtures in different locations. The computer can also be linked to the
wireless nodes through a wired or wireless connection to execute
control actions in each light fixture.
Communication
Data exchanges between intelligent control components and light
fixtures can take place using a variety of topologies. These topologies
define how the nodes in the intelligent lighting system are linked to
each other and how they communicate to deliver commands and
data.
Among the possible topologies, such as point-to-point, ring, star, tree,
or mesh topologies, the mesh is the most important topology for
lighting control. Its main advantage is that all nodes are equal peers.
In addition, the fact that all nodes are inter-connected to each other
provides high levels of flexibility and redundancy.
Regardless of the chosen implementation or topology, intelligent
lighting can be used with different communication methods. One
method is wireless communication. Many solution providers offer
systems that are easily integrated and can make use of wireless control
without having to manage the associated complexity. Alternatively,
Power-Line Communication (PLC) may be used to distribute control
signals and collect feedback from the light fixtures over the same
infrastructure that provides power to the fixtures.
A combination of wireless and PLC communications can be used to
configure a complete system capable of relaying commands and
information to the different nodes as required.
Features
Intelligent control offers a range of features depending on the need
and the capability of the lighting system. One key feature is dimming.
In addition to manual dimming, for example by adjusting a wall
dimmer or using a remote control, dimming signals can be sent
via a PC or the Internet using any of the communication methods
mentioned previously.
Moreover, the dimming signals can be generated automatically using
data from sensors such as motion detectors, ambient-light sensors,
light-output sensors, lightning detectors, or even temperature
sensors. Temperature sensing can be used to monitor thermal
conditions inside the fixture, allowing dimming to be used to protect
the LEDs and thereby enhance reliability.
Other potential intelligent-lighting features include monitoring of
energy consumption or failures within the lighting system.
From theory to practice
Since lighting contributes greatly to the overall energy consumption
of buildings such as factories, offices or homes, efficient lighting
systems can help to unlock significant energy savings. The following
example examines the performance of recessed downlights, one of
the most common applications in indoor lighting.
Fig. 1: Intelligent lighting-control components and methods
Figure 1 shows an example of how a variety of intelligent control
components can be combined to manage light fixtures using several
methods. In this figure, a computer is connected to the Internet to
18
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The comparison shows the power costs incurred by a conventional
Compact Fluorescent Lamp (CFL) downlight fixture, as in widespread
use today, an equivalent LED fixture using simple control, and an
intelligently controlled LED fixture. The intelligent lighting system
manages ON/OFF and dimming control according to the following
TECHNICAL VIEW
rules, using data from sensors and a pre-programmed scheduling
system:
•
•
•
24 hrs per day, 7 days per week:
- If the motion detector detects presence in a room, the light
will be turned ON
- The light levels from the luminaires will be adjusted to
take into account the ambient light to deliver a constant
illumination level
- During very sunny days, some lights may be turned OFF
if the sunlight is sufficient to help generate the target
illumination level
From 6pm to 6am and weekends:
-
The schedule will set the lights to be OFF for all unoccupied
rooms and, by extension, the entire building
-
The OFF state during this time is defined as the luminaires
being completely turned off
From 6am to 6pm:
- For meeting rooms or all rooms with a closed door, if
presence is not detected, the lights will be completely
turned OFF
- For open rooms or hallways, if presence is not detected,
lights will be dimmed to 60%
Table 1 summarises how each of these rules affects the utilisation of
the LED fixtures for the described scenario:
Table 1: Energy savings using intelligent control
The table shows that in addition to the savings gained by using LEDs
in the downlight fixtures, which are about 61.4% when compared
to a CFL, an additional 15.4% saving is realised when these LEDs are
optimally controlled based on the scenario above. So for the end user
the additional energy savings, in addition to the LED payback and other
value-added features, may justify the initial cost of implementing the
intelligent system.
Conclusion
From controlling light systems over a wireless or PLC infrastructure, to
initiating functions via sensor interaction, adding an intelligent system
into light fixtures goes beyond simply making the product more
appealing with impressive functionality; it also provides the means to
make lighting systems more interactive, more adaptable, and - most
importantly – more energy efficient.
The example presented in this article
shows that adding intelligent control
to an LED-based lighting system can
further reduce the energy cost by almost
15% for only one room. This is indeed a
“smart” way to reduce operating costs
and meet ever-tightening regulations
governing energy consumption.
Future Lighting Solutions has created
the Intelligent Lighting Platform to
support lighting customers with a
complete range of design options. The
platform includes ICs, subsystem bricks
and turnkey modules from renowned
manufacturers such as CEL, Cyan
Technology, Freescale Semiconductor,
Philips, Synapse Wireless and Yitran. The
platform mainly leverages Synapse’s
SNAP network operating system to allow
the seamless integration of multiple
control functions and communication
over various RF ISM bands and PLC.
Table 2: Power-consumption comparison
Table 1 illustrates that implementing intelligent control according to
the scheme described can reduce the total energy consumption from
the luminaires by 40% compared to the non-optimised LED luminaire
system.
Table 2 explains the power costs incurred by the CFL system, the LED
system, and the LED system with intelligent control.
www.futureelectronics.com
19
IRS2573D: HID System
Know-How-In A Chip
Fully Integrated Dedicated HID-IC Solution
Features:
Specifications
Part Number
Package
Offset
Voltage
(V)
IRS2573D
SO28-WB
600
Output
Voltage
Max. (V)
15.6
Output Source
Current (mA)
Output Sink
Current
(mA)
Deadtime
(µsec)
180
260
1.2
• Buck + full-bridge + lamp control in
one IC
• True lamp power regulation
• Fully integrated fault protection circuits
• Programmable fault and ignition timers
• Lamp mode state machine
Reference Design
Available!
Benefits:
SO28-WB
• Extensive HID system know-how-ina-chip
• Standard HID circuit topology
• Scalable for all lamp types and power
• Fast design time
IRPLHID2
for more information call 1.800.981.8699 or visit us at http://www.irf.com
THE POWER MANAGEMENT LEADER
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