Indoor Application

Indoor Application
1
Content
1
General introduction
2
Energy star for lighting
3
Practical Design Tips
4
TI LED driver reference design
– Non Dimmable: TPS92310, UCC28810 and LM3444
– Dimmable: LM3445/8, LM3447, LM3450, TPS92210 and TPS92070
2
General introduction
Introduction
• Cost of High Brightness LED is coming down, while performance is
improving.
• In the near future, the light efficacy of LEDs will be competitive or
better with compact fluorescent lamps, while…
– life-time of LEDs is significantly longer, &
– mercury-free
• Take-off of SSL in General Illumination requires…
– To fit standard luminaire form factors, such as PAR30/38, T5/T8..
– to compatible with existing electrical infrastructures including wallmounted dimmer switches.
How Conventional Triac Dimmer Works
The most common dimming method
is the TRIAC phase-control dimmer,
which can be used only on
incandescent or halogen lamps!!
a
Light
Bulb
b
3.3kΩ
Triac
Dimmer
MT2
250kΩ
linear
pot
0.1µF
n
c
G
Triac
MT1
Bilateral
trigger diode
(diac)
5
How Conventional Triac Dimmer Works
Replacing an incandescent lamp with
LEDs without changing Luminare
Form Factors & the current low-cost
Triac Dimmer Infrastructure in the
system!!
a
b
?
3.3kΩ
MT2
c
250kΩ
linear
pot
a
Light
Bulb
n
Triac
MT1
0.1µF
b
G
Bilateral
trigger diode
(diac)
3.3kΩ
Triac
Dimmer
250kΩ
linear
pot
0.1µF
n
Triac Dimmer
MT2
c
G
Triac
MT1
Bilateral
trigger diode
(diac)
6
How Conventional Triac Dimmer Works
• A RC network consisting of R1, R2, and C1, delay the turn on of the triac until the
voltage on C1 reaches the trigger voltage of the Diac.
• Increasing the resistance of the potentiometer (wiper moving downward)
increases the turn-on delay which decreases the on-time or "conduction angle"
of the triac ((θ).
).
� This reduces the average power delivered to the load.
7
How Conventional Triac Dimmer Works
• As Incandescent Lamp is pure resistive load, the Triac Dimmer works very
well with Incandescent Lamps.
• The thyristor turns on abruptly when the pulse generator fires, and it turns
off near the voltage zero-crossing when current falls below its holding
current.
The inductor and capacitor
filter the sharp voltage edge
to reduce conducted EMI.
The lamp provides resistive
damping to the L-C filter,
and its resistance provides
holding current to the
thyristor.
8
How Conventional Triac Dimmer Works
Dimmer
Live
Light bulb
Neutral
9
How Conventional Triac Dimmer Works
Dimmer
Live
Neutral
LED loading
AC / DC Constant current power supply
LED driver
LED driver is not a pure resistive
component in the system.
10
How Conventional Triac Dimmer Works
a
b
LED driver
3.3kΩ
MT2
c
250kΩ
linear
pot
a
n
Triac Dimmer
MT2
250kΩ
linear
pot
0.1µF
n
Bilateral
trigger diode
(diac)
b
3.3kΩ
Triac
Dimmer
Triac
MT1
0.1µF
Light
Bulb
G
c
G
Triac
MT1
Bilateral
trigger diode
(diac)
Replacing an incandescent lamp
with LEDs driven without changing
the current low cost Triac Dimmer
infrastructure in the system!!
11
Energy star for lighting
New section of ENERGY STAR Luminaires Version 1.0 specification
• The ENERGY STAR Luminaries Version 1.0 specification take effect
on October 1, 2011.
•
http://www.energystar.gov/ia/partners/prod_development/new_specs/downloads/luminaires/Luminaires_V1_0_Final_Draft%20_Sp
ecification.pdf
• This specification replaces the ENERGY STAR Residential Light
Fixtures and Solid State Lighting Luminaries specifications
New section of ENERGY STAR Luminaires Version 1.0 specification
– Residential Luminaire:
• A luminaire marketed and intended to be used in a residential
environment notwithstanding.
– Commercial Luminaire:
• A luminaire marketed and intended to be used in a commercial,
industrial or business environment.
– Solid State Lighting (SSL):
• solid state refers to the fact that the light is emitted from a solid
object. There are two types of solid-state light emitters: inorganic
light-emitting diodes (LEDs) or organic light-emitting diodes
(OLEDs).
14
New section of ENERGY STAR Luminaires Version 1.0 specification
Name of test Item
Luminous Efficacy
and Output
Requirements
Light Source Life
Requirements
ENERGY STAR Requirements
Until Sept. 1, 2013: ≥ 65 lm/W per LED light engine
After Sept. 1, 2013: ≥ 70 lm/W per LED light engine
25,000 hours for residential grade indoor luminaires
35,000 hours for residential grade outdoor luminaires
35,000 hours for commercial grade luminaires
Source Start Time Light source shall remain continuously illuminated
Requirements
within one second of application of electrical power.
Power Factor
Luminaire total input power ≤ 5 watts
watts:
Requirements
≥ 0.5
Luminaire total input power > 5 watts
watts:
Residential: ≥ 0.7
Commercial: ≥ 0.9
Referred to : ENERGY STAR Program Requirement for Luminaires
Page
11
17
25
28
Eligbility criteria – Version 1.0 , Final Draft
15
New section of ENERGY STAR Luminaires Version 1.0 specification
Name of test Item ENERGY STAR Requirements
Page
Electromagnetic Power supplies and/or drivers shall meet FCC
and Radio
requirements:
Frequency
• Class A for power supplies or drivers that are marketed
Interference
for use in a commercial, industrial or business
Requirements
environment
environment, exclusive of a device which is marketed for
use by the general public or is intended to be used in the
home.
• Class B for power supplies or drivers that are marketed
for use in a residential environment notwithstanding use
in commercial, business and industrial environments.
Requirement shall be met at all dimming levels, as
applicable
applicable.
35
Referred to : ENERGY STAR Program Requirement for Luminaires
Eligbility criteria – Version 1.0 , Final Draft
16
New section of ENERGY STAR Luminaires Version 1.0 specification
• h
Name of test Item
ENERGY STAR Requirements
Noise Requirements
All ballasts & drivers used within the luminaire shall
have a Class A sound rating.
Ballasts and drivers are recommended to be installed
in the luminaire in such a way that in operation, the
luminaire will not emit sound exceeding a measured
level of 24 dBA.
Page
31
Operating Frequency Frequency ≥ 120 Hz
Note: This performance characteristic addresses problems
Requirements
Referred
with visible flicker due to low frequency operation and
applies to steady-state as well as dimmed operation.
Dimming operation shall meet the requirement at all light
outputRequirement
levels. for Luminaires
to : ENERGY STAR Program
32
Eligbility criteria – Version 1.0 , Final Draft
17
New section of ENERGY STAR Luminaires Version 1.0 specification
Name of test Item
ENERGY STAR Requirements
Minimum Operating Luminaire shall have a minimum operating
Temperature
Exemption:
temperature of 0°F (-18°C) or below. (Exemption:
Requirements:
Indoor Luminaires
Luminaires)
Electronic Ballast or
Driver Requirements Safety – Ballasts,
Drivers
UL 8750-2009
Demonstrate compliance with ANSI/UL
8750-2009.
Page
37
40
18
Practical Design Tips
Practical Design Tips
Live
Neutral
Practical Design Tips
• Many AC/DC LED drivers apply simple bridge rectification.
Current is drawn from the source during a very short period at
the peak of the incoming voltage waveform. The dimmer will be
re-fire at same period.
Input voltage of LED driver
Across Dimmer
Input current
21
Practical Design Tips
Because, Market has many difference circuit of dimmer, the
holding current and trigger current of dimmer are not
predicted easily.
22
Practical Design Tips
• Most fluorescent, compact fluorescent, and LED lamps have
stickers stating “not for use with triac dimmers”
�because they are not appeared as pure resistive loading
• The Typical AC/DC Switched-mode LED driver
23
Practical Design Tips
• The holding current cannot float thought dimmer
continuously, the dimmer will be re-fire at same conduction
period.
• Add a resistor in the input of LED driver to increase holding
current conduct time.
resistor
24
Practical Design Tips
Non-isolated
• High efficiency
• Extra cost for Drop test
and ball impact test
• Non-isolated
Isolated
• Simple case design
• Large solution size
• Isolated
25
Practical Design Tips
Metal case help to reduce EMI. Because, LED Driver is
very close, the case provide shielding effect LED
driver.
• Without metal case
• With Metal Case
26
Audible noise in electronic circuitry
• Where is noise come from?
• The noise source come from Magnetic component ( transformer,
inductor…etc) and multilayer ceramic Capacitor (MLCC).
• Why they are produce noise?
– Magnetic component can produce audible noise due to,
�Percussion - The face of core pieces can scrape together
when the magnetic flux is varied.
�Collision of movable elements (bobbin, core , wire ..etc.),
�Magnetostriction- The dimension of coil material is
changed.
�Coil self Motion-The ripple current pass through coil
produces attractive and repulsive force
that to move the wires.
27
Audible noise in electronic circuitry
Multilayer ceramic Capacitor can produce audible noise due to,
�Piezoelectric effect – Substrate vibrate with Voltage
amplitude, and when the time amplitude cycle come to the
bandwidth of auditory are, Harmony is recognized as a noise.
Capacitor distortion transferred to the PCB acting as an
amplifier
Audible noise MLCC
28
Audible noise in electronic circuitry
No method to eliminate, But we can reduce the noise level.
Method to reduce noise level for magnetic parts
Reducing peak flux of magnetic as low as possible .
�Reducing
Potting the PCBA
�Potting
Vacuum Varnish for magnetic parts.
�Vacuum
Method to reduce noise level for MLCCic parts
Reduce capacitance value in a capacitor
�Reduce
Add a soft material to absolved the mechanical vibration.
�Add
Replace the MLCC with a plastic film (Polypropyleneor,
�Replace
…etc)
Polyester
Polyester…
Potting : Pot the PCBA.
�Potting
29
• More information on Triac Dimable Offline LED driver:
http://www.national.com/analog/led/triac_dimming
• More information on General Illumination:
http://www.national.com/led
Practical Design Tips
• Webench LED Designer – online design tool:
http://www.national.com/webench/led
• LED Reference Design Library:
http://webench.national.com/webench/ledrefdesigns.do
30
TI LED driver reference design
31
31
New
TPS92310
Single stage PFC AC/DC controller with Primary Side Regulation
TPS92310 Features Description
Single Stage Flyback AC-DC Controller:
•
Primary side Flyback LED current regulation
–
Doesn
Doesn’’t require opto-coupler or secondary side circuitry
•
Adaptive ON-time control with inherent PFC
•
Critical-Conduction-Mode (CrM) with Zero-Current-Detect (ZCD) for valley switching
– Reduces EMI filter design complexity
•
LED current setting with external sense resistor
•
No loop compensation required
•
Gate driver with slew rate control
–
Eases EMI filter design
•
Output voltage protection (OVP) through ZCD
•
VCC Under Voltage Lock Out (UVLO)
•
Thermal Shutdown
•
SOIC-10 package
33
Typical schematic (Constant On Time)
34
Typical schematic (Peak Current Mode)
35
What is difference between COT and PCM
operation.
IAC
VAC
Constant ON time
Peak Current Mode
(Pull MODE1 pin to GND)
>> High power factor
>>Low output ripple current
36
Design consideration
Fly wheel Shottky diode
Snubber
OVP
Resistor
Current sense
Resistor
37
TPS92310EVM Specification
TPS92310
Specification
Input voltage
LED config
Output current
Output power
EVM-110VAC EVM-220VAC
Value
Value
Unit
85-132
180-264
VAC
5-7
5-7
series
350
350
mA
5-7
5-7
Topology
Efficiency
Power Factor
Current sensing
Isolation
Single Stage
Flyback
85
>0.9
resistive
Yes
Single Stage
Flyback
85
>0.9
resistive
Yes
Driver Dimension
55 x 23 x 18
55 x 23 x 18
W
%
mm
38
EVM line regulation (ILED= 350mA)
39
EVM Input Voltage and Efficiency
40
PMP4325: AC/DC LED Driver for GU10
Reference
Design
AC Input GU10
AC/DC LED
Lighting Driver
TI Parts
Vin
Po
Vo
Topology
# of LED
Dimmin
g
Eff.
Isolated Flyback with
Primary Side Regulator
3~4
no
81%
Io
TPS92310
85~
277 Vac
4.2
W
8V~13V
350mA
Features
•
Isolated Flyback with Primary Side Control
•
Low total BOM cost
•
Efficiency >79% at 230Vac input
•
Output Short Circuit Protection
•
Output Over Voltage/Open protection
•
Allow no Y CAP application
•
Output ripple current: <30% of output current
•
Size: 30mmX18mmx10mm (ultra-slim, suitable for GU10)
Applications
•
GU10 replacement LED lighting
•
Wall-wash LED lighting
•
Residential/Commercial LED lighting
PMP4325: Schematic With Line Regulation
Compensation
Line regulation
Compensation circuit
Adjust R15 from 22ohm to 15ohm in order to
increase LED current to 350mA at low line
PMP4325: Efficiency Vs Input Voltage
efficiency
Efficiency is 80.5% at 110Vac
And 79.5% at 230Vac
85
82.5
80
77.5
75
Efficiency is 78.9% at 110Vac
And 76.4% at 230Vac
4 LEDs Efficiency
3 LEDs efficiency
72.5
70
85V
110V
132V
150V
180V
200V
230V
264V
277V
PMP4325: Line Regulation
400
LED current
350
300
332mA
337mA
339mA
341mA
346mA
350mA
358mA
365mA
368mA
250
200
150
100
50
LED current
0
85V
110V
132V
150V
180V
input voltage
200V
230V
264V
+/-5% line
regulation in
universal
277V
PMP4325: Line Regulation With Compensation
Circuit
400
LED current
350
350mA
352mA
300
353mA
347mA
343mA
347mA
353mA
360mA
250
200
150
100
50
LED current
0
90V
110V
132V
150V
180V
input voltage
200V
230V
264V
Good line regulation
<+/-2.5% in universal
and <1% at 110V and
230V
PMP4325: EMI Test report
4 LEDs GU10 Load
Vin: 230Vac Line
Io: full load Vin: 230Vac Neutral Io: full load
TPS92310 with Non-isolation solution
47
Electrical Performance
48
UCC28810/1
LED LIGHTING POWER CONTROLLER
49
UCC28810/1
LED Lighting Power Controller (PFC)
Features
Benefits
• Implements Single Stage Power Factor
Correction
• Transformer Zero Energy Detection
• Transition Mode Control
• Application Circuit Implements Phase-Cut
Dimming
• Advanced Transient Response, Accurate Internal
Vref, Low Start Up Current, 750mA Gate Drive
• Meets Power Factor Correction Standards for
Lighting Products
• High Efficiency, Low EMI Performance
• UVLO, Over-Voltage, and Open-Loop Detection
• Protects Against Faults and Abnormal Conditions
• Compatible with Large Installed base of TRIAC
Based Dimmers
• Improves Reliability and Life Time of Lighting
Fixture
Applications
• AC Input General Illumination, HB LED
Applications
• PFC Front-End for
Multi-Stage Lighting
Designs
•UCC28810EVM-002
(Universal,
100W), Multi-Stage
TOOLS
•UCC28810EVM-003 (Universal, 110W), Multi-Stage
50
PMP4301: T10/T8 AC/DC LED Driver for Fluorescent Lamp
Reference
Design
AC Input T8
AC/DC LED
Lighting Driver
for fluorescent
lamp
TI Parts
Vin
Po
Vo
Topology
Dimming
Eff.
PF
PWM
dimming
>87%
>0.97
Io
UCC28810/1
90~
20W
264
Vac
30V~42V
450mA
Features
Isolated singe Stage
high PF Flyback with
Transition Mode
Applications
•
Specific transformer for T8 lighting form factor
•
PWM dimming compatible
•
Low BOM cost
•
Efficiency >87% at 230Vac input
•
Isolated single stage w/ PF>0.97 at 230Vac input
•
Output over voltage protection: 45Vdc
•
Output ripple current: <30% of output current
•
Size: 245mmX18mmx11mm (ultra-slim)
•
T8 and T10 tube LED lighting
•
Wall-wash LED lighting
•
Commercial LED lighting with PWM dimming
H: 11mm
W:18mm
L:245mm
51
PMP4301: Efficiency Vs Input Voltage
efficiency Peak efficiency is 87.7% at 110Vac &
220Vac
89
88
87
86
85
84
83
82
81
80
efficiency
90
140
190
240
LM3445
TRAIC Dimmable Offline LED Driver
53
Schematic
54
Test data
VPRESET (V)
FPRESET (Hz)
PIN (W)
PF
VOUT (V)
IOUT (A)
POUT (W)
ηSYS (%)
∆IOUT =
180
190
200
210
50
50
50
50
7.915
8.427
8.911
9.376
0.78
0.774
0.767
0.761
20.549
20.583
20.621
20.672
0.293
0.312
0.331
0.347
6.017
6.424
6.815
7.175
76.02% 76.23% 76.48% 76.53%
24.00 mA
(220 - 240VAC)
220
230
240
250
260
50
9.778
0.755
20.717
0.362
7.497
76.68%
50
10.142
0.748
20.75
0.375
7.777
76.68%
50
10.448
0.741
20.773
0.386
8.023
76.79%
50
10.7
0.733
20.79
0.395
8.206
76.69%
50
10.895
0.726
20.804
0.402
8.353
76.67%
55
Measured Waveforms of LM3445 LED
Drivers
Full DIM
CH1: Gate Signal of Buck MOSFET
CH2: Voltage @ Vcc pin of LM3445
CH3: LED current
CH4: Input Voltage @ Buck Stage
Low Conduction Angle
As the conduction angle of triac dimmer is reduced,
LM3445 LED driver reduces continuous LED current
by lowing duty cycle of buck converter, thus 120Hz
flicker can be minimized!!
56
© 2010 National Semiconductor Corporation. Confidential.
56
LM3448
Phase Dimmable Offline LED Driver with Integrated FET
LM3448 direct substitute in LM3445
application
When switching FET is a concern in customer
to cost and / or purchasing, LM3448 is a right
solution for them.
LM3448
due
LM3448 Overview
Key Features
• Integrated phase angle dim decoder
• Integrated 600V switching MOSFET
• Avalanche energy capability
• Solution accepts offline input voltages
• Adjustable switching frequency
• No 120Hz flicker
• Low quiescent current
• Low Profile 16-pin narrow SOIC package
• Wave solder capable
Target Applications:
Dimmable LED lamps <8W
LM3448 Features/Benefits
Feature
Integrated phase angle dim decoder
Benefit
• Reduces solution size, design time, and
design complexity
• High performance/wide range dimming
with no 120Hz flicker
Integrated 600V MOSFET with avalanche
protection and low R DSON
• Reduces solution size, design time, and
design complexity
• Avalanche protection increases
reliability/robustness
• Low RDSON increases efficiency
Isolated and Non-Isolated configurable
• Increased design flexibility
Evaluation Modules
EVM Ordering Name
Description
Availability
LM3448-EDSNEV
Non-isolated, LM3448 A-19 edison retrofit
board optimized for small solution and
applications with 120VAC input voltages
Available
Now
LM3448-120VFLBK
Optimized for 120VAC input isolated
applications
Coming
Soon
LM3448-230VFLBK
Optimized for 230VAC input isolated
applications
Coming
Soon
EVM Photo
61
New
LM3447
PWM Controller IC for Dimmable LED Lamps
62
In development
LM3447
Phase Dimmable, Primary Side Sensing, QR Flyback Controller
• Fixed frequency PWM controller for isolated
Flyback topology
BR1
• Integrated phase angle decoding circuit
R1
• Constant power operation mode (based L IV E
R2
on input voltage feed-forward control)
V1
• Constant current operation mode (using an N EU TR AL
opto-isolator based feedback control)
• Output overvoltage protection based on VCC
voltage
R9
• Output short circuit protection based on
NTC1
current sense voltage
R1 2
• Thermal shutdown
R1 3
• TSSOP-14 package
R1 4
• SOIC-16 package
C8
• Quasi-Resonant mode operation
C9
• Optional thermal foldback using VADJ
C1 0
• Intelligent TRIAC hold circuitry enabling
accurate zero crossing detection
L1
T1
n1:n2
R5
R3
R6
C3
LED +
D2
C1
C2
R4
D1
Q1
+
D3
R7
C4
C5
D4
R8
LED –
+
C6
n3:
C7
L M 3447
1 VAC
2 SD
B IA S
14
R1 0
H O LD 1 3
R1 1
3
FLT1
VCC 12
4
FLT2
AUX 11
5
FF
G ATE 1 0
6
IN V
IS N S 9
7
COMP
GND 8
R1 5
Q2
R1 6
R1 7
C1 1
63
Holding Current
• No Dimmer Detected
–
–
–
–
HOLD FET OFF
Gate of Q1 set to 13.5V (int. Zener)
Drain of Q1 become BIAS - VGD
No current flows through R8 (holding resistor)
HOLD
• Dimmer Detected
–
–
–
–
–
HOLD FET ON
Gate of Q1 set to 13.5V (int. Zener)
Drain of Q1 become BIAS – VGD
Current flows through R8
R8 sets the amount of TRIAC holding current
I HOLD =
VGATE − VGS
RHOLD
64
FLT1 Output Signal (120Hz PWM)
VFLT1
VFLT1
xV
xV
0V
0V
Duty Cycle
Duty Cycle
FLT1 output is a 120Hz PWM signal with a duty cycle proportional to the dimmer phase-cut angle
65
FLT2 Input Signal (Filtered 120Hz PWM)
• Resulting signal from FLT1 is filtered and the result is a DC voltage that is proportional to
the dimmer phase-cut angle
• This DC voltage is applied to FLT2 and decoded by the ANGLE DECODING CIRCUIT
• This circuit provides a DIM_DET signal for the HOLD current internal FET and provides a
signal to the REFERENCE GENERATOR that in turn generates an internal reference
voltage VREF
• VREF is a voltage that linearly varies from 1V to 0V depending on the phase-cut angle
VREF
1V
0V
Phase-Cut Angle
0%
30%
150%
180%
FF – Input Feed Forward
• The VAC pin senses the rectified input voltage
• The INPUT VOLTAGE SENSE AND FEEDFORWARD CONTROL
generates a current at the FF pin that is a DC current that moves with
the input voltage
• The FF output gets filtered with an external 120Hz filter and the
resulting voltage is sensed at the INV pin and compared against V REF
• This in turn controls the duty cycle of the main switching FET (Q2)
67
LM3447 – Typical Application Circuit
Constant Power Regulation
L1
BR1
R1
CY1
R5
R3
L IV E
R6
C3 n1:n2
LED +
D2
C1
R2
C2
R4
V1
D1
Q1
+
D3
NEUTRAL
R7
C4
C5
D4
R8
LED –
+
C6
n3:
T1
C7
L M 3447
1 VAC
B IA S
14
R1 0
NTC1
2 TSNS
HO LD 1 3
3 FLT1
AUX 12
4 FLT2
VCC 11
R1 1
R1 2
R1 3
R1 5
C8
C9
R1 4
5 FF
G ATE 1 0
6 IN V
IS N S 9
7 COMP
GND 8
Q2
R1 6
R1 7
C1 1
C1 0
68
LM3450
LED Driver with Active Power Factor Correction and Phase
Dimming Decoder
69
LM3450 Application Blocks
R eturn
EMI Filter
VR E F
B IA S
VA D J
H OLD
F LT2
ZCD
F LT1
VC C
S econdary
LED Driver
L M 3450
PW M
AC
M a in s
D IM
GATE
VA C
CS
COM P
FB
LED
Load
Optical
Is olation
GND
IS E N
PW M
R eturn
70
LM3450 Overview
• PFC w/ TRIAC Decoder
� Decode TRIAC signal for phase dimmable applications
� PFC is active- less external circuitry
� 70:1 dim range
� Robust, smooth dimming range and excellent power factor
• Dynamic Hold Circuitry
� Decodes phase dimmer angle while minimizing power loss due to holding
current
� Higher Efficiency
• Analog Adjust
� Allows for analog dimming, thermal foldback, dimmer range adjust, or interface
to a sensor (ex. Ambient Light Sensing)
� Allows for versatility and differentiation of end application
71
Evaluation Modules
EVM Ordering Name
LM3450AEV120V30/NOPB
LM3450AEV230V30/NOPB
LM3450EV120V15W/NOPB
LM3450EV230V15W/NOPB
Description
Availability
� No 120 Hz LED current ripple.
� Better dimming performance at low
dimming levels.
� Better line disturbance rejection.
� Better efficiency using small LED
stack voltages
Available
Now
� No 120 Hz LED current ripple.
� Better dimming performance at low
dimming levels.
� Better line disturbance rejection.
� Better efficiency using small LED
stack voltages
Available
Now
� No 120 Hz LED current ripple.
� Better dimming performance at low
dimming levels.
� Better line disturbance rejection.
� Better efficiency using small LED
stack voltages
Available
Now
� No 120 Hz LED current ripple.
� Better dimming performance at low
dimming levels.
� Better line disturbance rejection.
� Better efficiency using small LED
stack voltages
Available
Now
EVM Photo
72
TPS92210
Single-Stage PFC Driver Controller for LED Lighting
TPS92210
PFC Offline LED Lighting Driver Controller
Features
Benefits
• Flexible Operating Modes: Peak Primary Current,
Constant On-Time, or both
• Constant On-Time implements Single Stage
Power Factor Correction (PFC)
• Cascoded MOSFET Configuration
• Works with TRIAC Dimmers
• Fast start up; Line Surge Ruggedness Better
Than Internal HV FET
• Continuous Exponential Dimming
• Transformer Zero Energy Detection
• High Efficiency, Low EMI
• Discontinuous Conduction or Transition Mode
Operation
• No Reverse Recovery Loss in Output Rectifier
• Advanced Over-Current Protection and Integrated
Over-voltage Protection
• Protects Driver Against Fault Conditions
Applications
• Residential LED Lighting Drivers: A19 (E26/27,
E14), PAR30/38, GU10
• Lighting Applications: Light Bulb Replacement,
Sconces, Wall Washers,
Architectural and
•TPS92210EVM-647 (110V)
Display Lighting, Commercial
Troffers
and
•TPS92210EVM-613
(230V)
TOOLS
Downlights
PMP4304A: 7W TRIAC dimming LED lighting Driver
Reference
Design
AC Input 7W
AC/DC LED
Lighting Driver /w
TRIAC dimming
TI Parts
Vin
Po
Vo
Topology
Eff.
PF
Singe Stage high PF with
TRIAC dimming
~80%
>0.95
Io
TPS9221
0
180-265
Vac
7W
TL431
16V~25V
350mA
(5~7
LEDs)
Features
Applications
•
50 components counts with low BOM cost
•
PAR20/30/38 LED Lighting
•
TRIAC dimmable solutions without flicking
•
Small form factor indoor Lighting
•
Primary side controls without opto-coupler
•
Constant On-time control with high power factor
75
•Q&A
76
Download PDF
Similar pages