UM10840 SSL5021BDB1267 230 V 6 W candle non

UM10840 SSL5021BDB1267 230 V 6 W candle non
UM10840
SSL5021BDB1267 230 V 6 W candle non-isolated low ripple
buck LED driver demo board with bipolar switch
Rev. 1.1 — 12 January 2015
User manual
Document information
Info
Content
Keywords
SSL5021BDB1267, SSL5021BTS, LED driver, non-isolated buck
topology, candle-form applications, TSOP6 package, bipolar switch
Abstract
This user manual describes the performance, technical data, and the
connection of the SSL5021BDB1267 demo board. The demo board uses
a bipolar switching transistor in a non-isolated buck topology.
The SSL5021BTS is an NXP Semiconductors driver IC in a TSOP6
package. It is intended to provide a low-cost, small form factor LED driver
design.
This SSL5021BDB1267 demo board is designed for candle-form
applications. It operates at 230 V (AC), with an output voltage of
approximately 80 V.
UM10840
NXP Semiconductors
SSL5021BDB1267 230 V 6 W candle buck LED driver demo board
Revision history
Rev
Date
Description
V.1.1
20150112
updated issue
v.1
20141022
first issue
Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
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1. Introduction
WARNING
Lethal voltage and fire ignition hazard
The non-insulated high voltages that are present when operating this product, constitute a
risk of electric shock, personal injury, death and/or ignition of fire.
This product is intended for evaluation purposes only. It shall be operated in a designated test
area by personnel qualified according to local requirements and labor laws to work with
non-insulated mains voltages and high-voltage circuits. This product shall never be operated
unattended.
This user manual describes the operation of the SSL5021BDB1267 demo board featuring
LED driver SSL5021BTS in a 230 V/6 W non-isolated application.
The SSL5021BDB1267 demo board is designed for driving LED loads from 40 V to 88 V
with a nominal value of 80 V.
The PCB dimensions are compatible with candle applications.
The SSL5021BDB1267 demo board provides a simple and effective solution with a low
output current ripple and high efficiency for Solid-State Lighting (SSL) applications.
1.1 Features
•
•
•
•
•
•
•
•
•
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Low-cost design
Candle form/GU-10 applications
Open LED string protection (optional)
Short LED string protection
OverCurrent Protection (OCP)
OverTemperature Protection (OTP)
Efficiency > 88 % at 230 V (AC) nominal input
Compliant with IEC61000-3-2 harmonic standard
Compliant with EN55015 conducted EMI
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2. Safety warning
The demo board input is connected to the mains voltage. Avoid touching the board while it
is connected to the mains voltage and when it is in operation. An isolated housing is
obligatory when used in uncontrolled, non-laboratory environments. Galvanic isolation
from the mains phase using a fixed or variable transformer is always recommended.
Figure 1 shows the symbols on how to recognize these devices.
019aab174
019aab173
a. Isolated
Fig 1.
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b. Not isolated
Isolation symbols
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SSL5021BDB1267 230 V 6 W candle buck LED driver demo board
3. Specifications
Table 1 lists the specification of the SSL5021BDB1267 demo board.
Table 1.
SSL5021BDB1267 specifications
Symbol
Parameter
Value
Vmains
AC mains supply voltage
230 V (AC); 10 %
Pout
output power
5.7 W
VLED
output voltage
40 V to 88 V (80 V nominal)
ILED
output current
71 mA
ILED(ripple)
output current ripple
< 3 % (100 Hz)
ILED/ILED(nom)Vmains
line regulation
1.0 % at Vmains; 10 %
ILED/ILED(nom)VLED
load regulation
0.5 % at VLED; 10 %

efficiency
89 % at 230 V (AC)/50 Hz
PF
power factor
> 0.55 at 230 V (AC)/50 Hz
Toper
operating temperature
40 C to +105 C
-
board dimensions
60 mm  40 mm
-
conducted electrostatic
Interference (EMI)
EN55015
-
IEC61000-3-2
class D (for Pin < 25 W limit)
Figure 2 shows the dimensions of the demo board.
Fig 2.
UM10840
User manual
SSL5021BDB1267 demo board dimensions
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SSL5021BDB1267 230 V 6 W candle buck LED driver demo board
4. Board photographs
a. Top view
b. Bottom view
Fig 3.
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SSL5021BDB1267 demo board photographs
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SSL5021BDB1267 230 V 6 W candle buck LED driver demo board
5. Board connections
The SSL5021BDB1267 demo board is optimized for a 230 V/50 Hz supply. It is designed
to work with multiple LEDs or an LED module.
Under the expected conditions, the output current is 71 mA when using an LED string with
an 80 V forward voltage (VF). The current can be adjusted using resistor R5 (and R10 in
parallel if a more accurate adjustment is required). An 80 V LED voltage gives a good
efficiency and line regulation at 230 V (AC).
K1 is the connection for the mains voltage. Anode and cathode at K2 are the connections
for the LED load. Figure 4 shows the connections.
Fig 4.
UM10840
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SSL5021BDB1267 board connections
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6. Functional description
6.1 Input filtering
Capacitors C1 and C3 and inductor L1 filter the switching current from the buck converter
to the line. Capacitors C1 and C3 also provide a low-impedance path for the switching
current. The value of C1 is selected to have no more than a 30 % ripple on the bus voltage
at 15 % of typical mains.
The input series resistance of 27  and capacitor C1 together provide adequate
protection against transient surge voltages. For immunity to the line surge, the input
resistance is added (see Figure 12). Do not omit this resistor or lower its value.
6.2 Efficiency improvement for universal mains
The SSL5021BTS is supplied via start-up resistors R3 and R4. To keep the temperature
low and retain ease of adjustment of the desired value, the power losses in these resistors
are divided over the two resistors.
For mains voltages up to 120 V (AC), a single 1206 size SMD resistor (R3) is sufficient.
The maximum voltage and the power rating are not exceeded.
6.3 Open-load protection
The driver board is protected when the LED load is accidentally left open. The open-load
protection is a non-latched protection. It recovers when the LED string is reconnected.
The LED current is not controlled when reconnecting which could destroy the LED string.
Therefore turn off the mains before reconnecting the LED load. Two circuits set the
open-load output voltage. One circuit (R9) sets the open-load output voltage when the IC
does not operate because of a defect. The other circuit (OVP option) sets it when the IC is
operating normally. In all cases, the output voltage must never exceed the rated DC
voltage of the output capacitor.
IC not operating
The voltage divider, consisting of resistors R3 and R4, sets the output voltage from the
VCC pin of the IC to the GND pin of the IC and resistor R9.
 V bus – 13   R9
V out = -------------------------------------R3 + R4 + R9
(1)
n  2.5 V
As a rule of thumb, limit resistor R9 to ---------------------------- . In this way, the voltage is not sufficient
2  190 A
to turn on the LEDs (n is the number of LEDs in series at the output).
The non-operating output voltage must not be equal to or exceed the voltage set by the
operating mode. It is good practice to set the level in non-operating mode 5 V to 10 V
lower than in operating mode.
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SSL5021BDB1267 230 V 6 W candle buck LED driver demo board
IC operating with OVP option
When the voltage in the non-operating mode is set to a safe level for the output capacitor,
the voltage in the operating mode can be set. The DEMOVP pin detects overvoltage when
the optional resistors R7 and R8 are placed and a 5.6 k resistor replaces R6. It triggers
when four consecutive high-frequency cycles at 1.8 V are detected at the DEMOVP pin.
R7 + R8
V out = 1.8   1 + -------------------- sets the output voltage. The output voltage must never exceed

R6 
the rated DC voltage of the output capacitor.
For resistor R6, do not use a value that exceeds 5.6 k. The DEMOVP pin is a high ohmic
input. It is sensitive to disturbance causing false OVP triggering.
IC operating without OVP option
When the OVP option is not used, resistor R6 can be shorted and R7 and R8 can be set
to not mounted. As a result of shorting the DEMOVP pin, switching of the converter does
not have proper valley detection anymore, giving an efficiency decrease of approximately
1 %. At open output, the converter is operating but the output voltage remains well below
the 200 V voltage rating of C9. By default, the OVP option is not mounted on the
SSL5021BDB1267 demo board.
6.4 LED current and sense resistors
To optimally profit from the excellent current stability of the SSL5021BTS over
temperature, 50 ppm MELF type resistors are recommended to sense the LED current.
The output current stability range drops to 3 % compared to 7 % over the full temperature
range for normal 200 ppm 1206 type resistors.
In most low-power, low-cost applications with LED currents < 150 mA, 200 ppm resistors
are fine. ILED(AV) = 0.4 / R5 can adjust the average LED current. If the change is small
(10 %), changing the inductor is not required. At the lowest mains voltage, the maximum
ON-time of Q1 must not exceed 15 s.
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SSL5021BDB1267 230 V 6 W candle buck LED driver demo board
7. Performance
Vmains = 170 V to 265 V (AC); 25 C; ILED = 71 mA typical; VLED = 80 V unless otherwise
specified.
7.1 Efficiency
DDD
Ș
Fig 5.
9PDLQV9506
Efficiency as a function of Vmains
7.2 Input power
DDD
3LQ
:
Fig 6.
UM10840
User manual
9PDLQV9506
Power factor as a function of Vmains
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SSL5021BDB1267 230 V 6 W candle buck LED driver demo board
7.3 Line regulation
DDD
,/('
P$
Fig 7.
9PDLQV9506
Line regulation
7.4 Load regulation
DDD
,/('
P$
9/('9
(1) Vmains = 230 V
(2) Vmains = 170 V
(3) Vmains = 265 V
Fig 8.
UM10840
User manual
Load regulation
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SSL5021BDB1267 230 V 6 W candle buck LED driver demo board
7.5 Output ripple
DDD
5LSSOH
Fig 9.
UM10840
User manual
9PDLQV9506
Low-frequency output ripple as a function of Vmains
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SSL5021BDB1267 230 V 6 W candle buck LED driver demo board
7.6 ElectroMagnetic Interference (EMI)
Figure 10 shows the conducted EMI result of the SSL5021BDB1267 demo board.
a. Line
b. Neutral
Fig 10. Conducted EMI
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NXP Semiconductors
UM10840
User manual
8. Schematic
8.1 Functional schematic
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Fig 11. SSL5021BDB1267 demo board schematic diagram
UM10840
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(6-
SSL5021BDB1267 230 V 6 W candle buck LED driver demo board
Rev. 1.1 — 12 January 2015
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NXP Semiconductors
UM10840
User manual
8.2 Demo board schematic
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UM10840
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Fig 12. SSL5021BDB1267 demo board schematic
SSL5021BDB1267 230 V 6 W candle buck LED driver demo board
Rev. 1.1 — 12 January 2015
All information provided in this document is subject to legal disclaimers.
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UM10840
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SSL5021BDB1267 230 V 6 W candle buck LED driver demo board
9. Bill Of Materials (BOM)
9.1 Functional BOM
Figure 11 shows the functional application as it is implemented on this demo board. It has
a component count of 19 items, including the IC. Table 2 contains the corresponding
BOM.
Table 2.
Functional bill of materials
Reference
Description and values
Part number
Manufacturer
BD1
bridge rectifier; 1000 V; 500 mA;
MD5S
Rectron
C1
capacitor; 2.2 F; 20 %; 400 V
ECA2GHG2R2
Panasonic
C3
capacitor; 100 nF; 10 %; 450 V
CL21-450V-0.1F-K
AIDI
C5
capacitor; 330 pF; 10 %; 50 V; X7R; 0805 -
-
C8
capacitor; 2.2 F; 10 %; 16 V; X7R; 0805
CC0805KKX7R7BB225
Yageo
C9
capacitor; 100 nF; 10 %; 200 V; X7R;
1206
C1206C104K2RACTU
KEMET
D2
diode; 600 V; 1 A
ES1J
Fairchild
D3
diode; Zener; 15 V; 250 mA
BZX384-C15
NXP Semiconductors
L1
inductor; 1 mH; 170 mA
22R105C
Murata
L2
inductor; 6.8 mH; 180 mA
TSL1112RA-682JR18-PF
TDK
Q1
transistor; PNP; 45 V; 100 mA
BC857A,215
NXP Semiconductors
Q2
transistor; NPN; 700 V; 0.8 A
BUJ100LR
NXP Semiconductors
R1
resistor; 27 ; 10 %; 2 W; THT
EMC2-27R0K
Welwyn Components
R2
resistor; 680 ; 5 %; 100 mW; 0805
-
-
R3
resistor; 510 k; 5 %; 250 mW; 1206
-
-
R4
resistor; 470 k; 5 %; 250 mW; 1206
-
-
R5
resistor; 5.6 ; 1 %; 250 mW; 1206
-
-
R9
resistor; 330 k; 5 %; 250 mW; 1206
-
-
U2
LED driver; TSOP6
SSL5021BTS
NXP Semiconductors
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9.2 Demo board BOM
Figure 12 shows the actual application as it is implemented on this demo board. Table 3
contains the corresponding BOM.
Table 3.
Reference
SSL5021BDB1267 demo board bill of materials
Description and values
Part number
Manufacturer
BD1
bridge rectifier; 1000 V; 500 mA;
MD5S
Rectron
C1
capacitor; 2.2 F; 20 %; 400 V
ECA2GHG2R2
Panasonic
C3
capacitor; 100 nF; 10 %; 450 V
CL21-450V-0.1F-K
AIDI
C5
capacitor; 330 pF; 10 %; 50 V; X7R; 0805 -
-
C8
capacitor; 2.2 F; 10 %; 16 V; X7R; 0805
CC0805KKX7R7BB225
Yageo
C9
capacitor; 100 nF; 10 %; 200 V; X7R;
1206
C1206C104K2RACTU
KEMET
D2
diode; 600 V; 1 A
ES1J
Fairchild
D3
diode; Zener; 15 V; 250 mA
BZX384-C15
NXP Semiconductors
K1; K2
connector; terminal block; 5.00 mm
1715022
Phoenix
L1
inductor; 1 mH; 170 mA
22R105C
Murata
L2
inductor; 6.8 mH; 180 mA
TSL1112RA-682JR18-PF
TDK
Q1
transistor; PNP; 45 V; 100 mA
BC857A,215
NXP Semiconductors
Q2
transistor; NPN; 700 V; 0.8 A
BUJ100LR
NXP Semiconductors
R1
resistor; 27 ; 10 %; 2 W; THT
EMC2-27R0K
Welwyn Components
R2
resistor; 680 ; 5 %; 100 mW; 0805
-
-
R3
resistor; 510 k; 5 %; 250 mW; 1206
-
-
R4
resistor; 470 k; 5 %; 250 mW; 1206
-
-
R5
resistor; 5.6 ; 1 %; 250 mW; 1206
-
-
R6
resistor; 0 ; 0603
-
-
R7; R8
resistor; not mounted; 150 k; 5 %;
250 mW; 1206
-
-
R9
resistor; 330 k; 5 %; 250 mW; 1206
-
-
R10
resistor; not mounted; 1 %; 250 mW;
1206
-
-
U2
LED driver; TSOP6
SSL5021BTS
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10. Board layout
a. Top view
b. Bottom view
Fig 13. SSL5021BDB1267 demo board layout
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11. Abbreviations
Table 4.
Abbreviations
Acronym
Description
EMI
ElectroMagnetic Interference
LED
Light-Emitting Diode
OCP
OverCurrent Protection
OTP
OverTemperature Protection
PF
Power Factor
SSL
Solid-State Lighting
MELF
Metal Electrode Leadless Face
12. References
[1]
UM10840
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SSL5021BTS data sheet — Compact low-ripple buck LED driver IC
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13. Legal information
13.1 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
NXP Semiconductors does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using NXP
Semiconductors products in order to avoid a default of the applications and
the products or of the application or use by customer’s third party
customer(s). NXP does not accept any liability in this respect.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
13.2 Disclaimers
Limited warranty and liability — Information in this document is believed to
be accurate and reliable. However, NXP Semiconductors does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information. NXP Semiconductors takes no
responsibility for the content in this document if provided by an information
source outside of NXP Semiconductors.
In no event shall NXP Semiconductors be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of NXP Semiconductors.
Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
Suitability for use — NXP Semiconductors products are not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors and its suppliers accept no liability for
inclusion and/or use of NXP Semiconductors products in such equipment or
applications and therefore such inclusion and/or use is at the customer’s own
risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP Semiconductors
accepts no liability for any assistance with applications or customer product
design. It is customer’s sole responsibility to determine whether the NXP
Semiconductors product is suitable and fit for the customer’s applications and
products planned, as well as for the planned application and use of
customer’s third party customer(s). Customers should provide appropriate
design and operating safeguards to minimize the risks associated with their
applications and products.
Evaluation products — This product is provided on an “as is” and “with all
faults” basis for evaluation purposes only. NXP Semiconductors, its affiliates
and their suppliers expressly disclaim all warranties, whether express, implied
or statutory, including but not limited to the implied warranties of
non-infringement, merchantability and fitness for a particular purpose. The
entire risk as to the quality, or arising out of the use or performance, of this
product remains with customer.
In no event shall NXP Semiconductors, its affiliates or their suppliers be liable
to customer for any special, indirect, consequential, punitive or incidental
damages (including without limitation damages for loss of business, business
interruption, loss of use, loss of data or information, and the like) arising out
the use of or inability to use the product, whether or not based on tort
(including negligence), strict liability, breach of contract, breach of warranty or
any other theory, even if advised of the possibility of such damages.
Notwithstanding any damages that customer might incur for any reason
whatsoever (including without limitation, all damages referenced above and
all direct or general damages), the entire liability of NXP Semiconductors, its
affiliates and their suppliers and customer’s exclusive remedy for all of the
foregoing shall be limited to actual damages incurred by customer based on
reasonable reliance up to the greater of the amount actually paid by customer
for the product or five dollars (US$5.00). The foregoing limitations, exclusions
and disclaimers shall apply to the maximum extent permitted by applicable
law, even if any remedy fails of its essential purpose.
Safety of high-voltage evaluation products — The non-insulated high
voltages that are present when operating this product, constitute a risk of
electric shock, personal injury, death and/or ignition of fire. This product is
intended for evaluation purposes only. It shall be operated in a designated
test area by personnel that is qualified according to local requirements and
labor laws to work with non-insulated mains voltages and high-voltage
circuits.
The product does not comply with IEC 60950 based national or regional
safety standards. NXP Semiconductors does not accept any liability for
damages incurred due to inappropriate use of this product or related to
non-insulated high voltages. Any use of this product is at customer’s own risk
and liability. The customer shall fully indemnify and hold harmless NXP
Semiconductors from any liability, damages and claims resulting from the use
of the product.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
13.3 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
GreenChip — is a trademark of NXP Semiconductors N.V.
UM10840
User manual
All information provided in this document is subject to legal disclaimers.
Rev. 1.1 — 12 January 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
20 of 21
UM10840
NXP Semiconductors
SSL5021BDB1267 230 V 6 W candle buck LED driver demo board
14. Contents
1
1.1
2
3
4
5
6
6.1
6.2
6.3
6.4
7
7.1
7.2
7.3
7.4
7.5
7.6
8
8.1
8.2
9
9.1
9.2
10
11
12
13
13.1
13.2
13.3
14
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety warning . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Board photographs . . . . . . . . . . . . . . . . . . . . . . 6
Board connections . . . . . . . . . . . . . . . . . . . . . . 7
Functional description . . . . . . . . . . . . . . . . . . . 8
Input filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Efficiency improvement for universal mains . . . 8
Open-load protection . . . . . . . . . . . . . . . . . . . . 8
LED current and sense resistors . . . . . . . . . . . 9
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Input power . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Line regulation . . . . . . . . . . . . . . . . . . . . . . . . 11
Load regulation . . . . . . . . . . . . . . . . . . . . . . . . 11
Output ripple . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ElectroMagnetic Interference (EMI) . . . . . . . . 13
Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Functional schematic . . . . . . . . . . . . . . . . . . . 14
Demo board schematic. . . . . . . . . . . . . . . . . . 15
Bill Of Materials (BOM) . . . . . . . . . . . . . . . . . . 16
Functional BOM . . . . . . . . . . . . . . . . . . . . . . . 16
Demo board BOM. . . . . . . . . . . . . . . . . . . . . . 17
Board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 19
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Legal information. . . . . . . . . . . . . . . . . . . . . . . 20
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP Semiconductors N.V. 2015.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
Date of release: 12 January 2015
Document identifier: UM10840
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
NXP:
SSL5021BDB1267UL
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