UM10908 - NXP Semiconductors

UM10908 - NXP Semiconductors
UM10908
SSL5251DB1245 120 V dimmable A19 demo board
Rev. 1 — 2 September 2015
User manual
Document information
Info
Content
Keywords
SSL5251DB1245, SSL5251T, dimmable, LED driver, buck-boost
converter, A19
Abstract
This user manual describes The SSL5251DB1245 demo board. The demo
board is a 9.4 W output, dimmable LED driver featuring the SSL5251T.
The driver employs a buck-boost converter to provide a simple and
efficient solution for mains-dimmable bulb applications.
UM10908
NXP Semiconductors
SSL5251DB1245 120 V dimmable A19 demo board
Revision history
Rev
Date
Description
v.1
20150902
first issue
Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
UM10908
User manual
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 2 September 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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SSL5251DB1245 120 V dimmable A19 demo board
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 SSL5251DB1245 demo board. The demo board is a
9.4 W output, dimmable LED driver featuring SSL5251T. To provide a simple and efficient
solution for mains-dimmable bulb applications, the driver employs a buck-boost converter.
The board is designed to highlight good dimming performance, wide dimmer compatibility,
and cost effectiveness. It produces a regulated output current at 170 mA to drive 54 V
LEDs (±10 %) from an input of 108 V (AC) to 132 V (AC). The SSL5251DB1245 demo
board achieves up to 85 % efficiency.
For more detailed information on the operation of the driver IC, the SSL5251T, and
operation of buck converters, see the SSL5251T data sheet.
2. Safety warning
The board must be connected to the mains voltage. Avoid touching the board during
operation. An isolated housing is obligatory when used in uncontrolled, non-laboratory
environments. Galvanic isolation of the mains phase using a variable transformer is
always recommended. Figure 1 shows the symbols on how to recognize these devices.
019aab174
019aab173
a. Isolated
Fig 1.
UM10908
User manual
b. Not isolated
Isolation symbols
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SSL5251DB1245 120 V dimmable A19 demo board
3. Specifications
Table 1.
UM10908
User manual
SSL5251DB1245 specifications
Symbol
Parameter
Value
Vmains
mains voltage
108 V to 132 V; 120 V typical; at 60 Hz
VLED
LED output voltage
48 V to 60 V; 54 V typical
ILED
LED output current
170 mA; Vin = 120 V; VOUT = 55 V
fsw
switching frequency
60 kHz; Vin = 120 V (peak)
ILED(ripple)
LED output current ripple
27 %; Vin = 120 V; VOUT = 55 V; IOUT = 170 mA
PF
input power factor
0.97 %; Vin = 108 V to 132 V; Vout = 55 V;
Iout = 170 mA
THD
total harmonic distortion
16 %

efficiency
85 %; Vin = 108 V to 132 V; Vout = 55 V;
Iout = 170 mA
ILED/Vmains
line regulation
0.5 %; line: 108 V to 132 V; Vout = 55 V
ILED/VLED
load regulation
0.5 %; line: 48 V to 60 V; Vin = 120 V
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 2 September 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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UM10908
NXP Semiconductors
SSL5251DB1245 120 V dimmable A19 demo board
4. Board photographs
a. Top view
b. Bottom view
Fig 2.
UM10908
User manual
SSL5251DB1245 demo board photographs
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Rev. 1 — 2 September 2015
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SSL5251DB1245 120 V dimmable A19 demo board
5. Board connections
Under the expected conditions, the output current is 200 mA when using an LED string
with a forward voltage (VF) from 48 V to 60 V. The current can be adjusted using resistors
R1 and R2.
J1 and J2 are the connections for the main voltage. J3 (LED+) and J4 (LED-) are the
connections for LED load. Fig 3 shows the connections.
Fig 3.
UM10908
User manual
SSL5251DB1245 board connections
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SSL5251DB1245 120 V dimmable A19 demo board
6. Performance
6.1 Efficiency
DDD
Ș
9PDLQV9
(1) VLED = 46 V
(2) VLED = 55 V
(3) VLED = 64 V
Fig 4.
Efficiency as a function of input voltage
6.2 Power factor
DDD
3)
9PDLQV9
(1) VLED = 46 V
(2) VLED = 55 V
(3) VLED = 64 V
Fig 5.
UM10908
User manual
Power factor as a function of input voltage
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SSL5251DB1245 120 V dimmable A19 demo board
6.3 Total harmonic distortion
DDD
7+'
9PDLQV9
(1) VLED = 46 V
(2) VLED = 55 V
(3) VLED = 64 V
Fig 6.
Total harmonic distortion as a function of input voltage
6.4 Line regulation
DDD
,/('
P$
9PDLQV9
(1) VLED = 46 V
(2) VLED = 55 V
(3) VLED = 64 V
Fig 7.
UM10908
User manual
LED current as a function of input voltage
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Rev. 1 — 2 September 2015
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SSL5251DB1245 120 V dimmable A19 demo board
6.5 ElectroMagnetic Interference (EMI)
UM10908
User manual
Fig 8.
Conducted EMI
Fig 9.
Radiated EMI
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NXP Semiconductors
UM10908
User manual
7. Schematic
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Fig 10. SSL5251DB1245 buck-boost driver with 54 V/170 mA output
UM10908
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© NXP Semiconductors N.V. 2015. All rights reserved.
DDD
SSL5251DB1245 120 V dimmable A19 demo board
Rev. 1 — 2 September 2015
All information provided in this document is subject to legal disclaimers.
ȍ
4
6741
UM10908
NXP Semiconductors
SSL5251DB1245 120 V dimmable A19 demo board
7.1 Circuit description
7.1.1 Input circuit
The input circuit provides rectification of the AC line (BD1), lighting/surge protection
(MOV1), phase-cut transient limiting, an active damper (Q2, R5, C7, Q1, D2, R3, R4), and
an EMI filter (C1, L1, C2).
7.1.2 Power stage
The power stage (Q3, L2, C6, D1) is a buck-boost converter that drives LED load from the
rectified input voltage. It operates with 60 kHz to 70 kHz switching frequency with BCM
and on-time control.
7.1.3 Control circuit
The SSL5251T regulates LED current to the desired value when no dimmer is connected.
When a dimmer is used, it also tries to regulate LED current to the desired value when the
dimmer is at the maximum angle. The dimming is implemented through the DIM pin. The
DIM pin monitors the average input voltage. When the dimmer is dimmed down, the dim
pin sets a lower voltage, commanding a lower LED current.
UM10908
User manual
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Rev. 1 — 2 September 2015
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SSL5251DB1245 120 V dimmable A19 demo board
8. Bill Of Materials (BOM)
Table 2.
SSL5251DB1245 bill of materials
Reference
Description and values
Part number
Manufacturer
C1
capacitor; 0.1 F; 5 %; 250 V; axial
ECQ-E2104KF
Panasonic
C2
capacitor; 0.22 F; 5 %; 250 V; axial
ECQ-E2224KF
Panasonic
C3
capacitor; 2.2 F; 50 V; X7R; 1206
CL31B225KBHNNNE
Samsung
C4
capacitor; 180 nF; 5 %;  10 V; 0603
GRM188R71C184KA01D
Murata
C5
capacitor; 1 F;  10 V; X7R; 0805
LMK107B7105KA-T
Taiyo Yuden
C6
capacitor; 330 F; 20 %; 63 V; radial
UPW1J331MHD
Nichicon
C7
capacitor; 12 nF; 50 V; X7R; 0603
C0603C123K5RACTU
KEMET
C8
capacitor; 33 pF; 500 V; COG, NPO; 1206 CL31C330KGFNNNE
Samsung
BD1
bridge rectifier; 600 V; 0.8 A; MBS
B6S-G
Comchip Tech
D1
diode; fast recovery; 1 A; 400 V; SMA
ES1G
Fairchild
D2
diode; 200 mA; 75 V; SOD80
PMLL4148
NXP Semiconductors
L1
inductor; 1.5 mH; 10 %; 100 mA
MSS1278-684KLB
Bourns
L2
inductor; 680 H; 10 %; > 900 mA
RFB1010-681
Coilcraft
Q1
transistor; PNP; 500 mA; 45 V; SOT23
MMBT3906
NXP Semiconductors
Q2
transistor; NFET; 380 mA; 500 V; TO-92
FQN1N50CTA
Fairchild
Q3[1]
transistor; NFET; 500 mA; 450 V; TO-92
STQ3N45K3
ST
R1; R2
resistor; 1.82 ; 1 %; 0805
-
ROHM
R3
resistor; 1500 k; 1 %; 0.25 W; 1206
ERJ-8ENF1504V
Panasonic
R4
resistor; 84.5 k; 1 %; 0.1 W; 0603
ERJ-3EKF8452V
Panasonic
R5
resistor; 130 ; 5 %; 0.25 W; axial
CFR-25JR-130R
Yageo
R6
resistor; 200 k; 1 %; 0.25 W; 1206
-
Yageo
R7
resistor; 2.49 M; 1 %; 0.1 W; 0603
-
Yageo
R9
resistor; 1500 k; 1 %; 0.25 W; 1206
-
Yageo
R11
resistor; 40.2 k; 1 %; 0.1 W; 0603
-
Yageo
R12
resistor; 5.6 k; 1 %; 0.1 W; 0603
-
Yageo
R13
resistor; 187 k; 1 %; 0.125 W; 0805
-
Yageo
R15
resistor; 100 k; 1 %; 0.125 W; 0805
-
MOV1
surge absorber; 205 V; 1.2 kA; 13 J; axial MOV-07D201K
Bourns
U1
SSL5251T
SO8
NXP Semiconductors
F1
fuse; fast; 1 A; 125 V (AC)
6.10 mm  2.54 mm  2.54 mm
AF2-1.00V125TM
AEM
[1]
Yageo
The board is installed with a low-cost Q3. However, use a MOSFET like STQ3N45 or better to achieve a better and more representing
efficiency.
UM10908
User manual
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Rev. 1 — 2 September 2015
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SSL5251DB1245 120 V dimmable A19 demo board
9. Abbreviations
Table 3.
Abbreviations
Acronym
Description
BCM
Boundary Conduction Mode
EMI
ElectroMagnetic Interference
LED
Light-Emitting Diode
PF
Power Factor
THD
Total Harmonic Distortion
10. References
[1]
UM10908
User manual
SSL5251T data sheet — Compact high power factor dimmable LED driver IC
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11. Legal information
11.1
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.
11.2
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.
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.
11.3
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.
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12. Contents
1
2
3
4
5
6
6.1
6.2
6.3
6.4
6.5
7
7.1
7.1.1
7.1.2
7.1.3
8
9
10
11
11.1
11.2
11.3
12
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety warning . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Board photographs . . . . . . . . . . . . . . . . . . . . . . 5
Board connections . . . . . . . . . . . . . . . . . . . . . . 6
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Power factor . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Total harmonic distortion. . . . . . . . . . . . . . . . . . 8
Line regulation . . . . . . . . . . . . . . . . . . . . . . . . . 8
ElectroMagnetic Interference (EMI) . . . . . . . . . 9
Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Circuit description . . . . . . . . . . . . . . . . . . . . . . 11
Input circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power stage . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Control circuit . . . . . . . . . . . . . . . . . . . . . . . . . 11
Bill Of Materials (BOM) . . . . . . . . . . . . . . . . . . 12
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 13
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Legal information. . . . . . . . . . . . . . . . . . . . . . . 14
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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: 2 September 2015
Document identifier: UM10908
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