34.6915 [NXP]
SSL1523 high power factor 5 W LED driver for universal; SSL1523高功率因数5 W LED驱动器通用型号: | 34.6915 |
厂家: | NXP |
描述: | SSL1523 high power factor 5 W LED driver for universal |
文件: | 总21页 (文件大小:389K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
UM10406
SSL1523 high power factor 5 W LED driver for universal
mains
Rev. 01 — 3 August 2010
User manual
Document information
Info
Content
Keywords
Abstract
SSL1523, SSL152x family, LED driver, mains supply, AC/DC conversion
This user manual describes a demonstration (demo) board for a mains
operated non-dimmable 5 W LED driver using the SSL1523 SMPS
controller IC.
UM10406
NXP Semiconductors
SSL1523 5 W LED driver
Revision history
Rev
Date
Description
01
20100803
Draft version
Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
UM10406
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© NXP B.V. 2010. All rights reserved.
User manual
Rev. 01 — 3 August 2010
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UM10406
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SSL1523 5 W LED driver
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 that is 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.
1.1 General description
The SSL1523 5 W LED driver is a high performance solution for a professional non-dim-
mable application with multiple high power LEDs, that requires galvanic isolation and a
safe output voltage. It can generate a regulated output current with an output power of up
to 5 W, which is equal to a 25 W incandescent lamp (at 63 Lumen/W). Examples are shelf
lighting, down lighting, LED lighting for bathrooms etc. This device can also be used with
less external components in an application, if some performance compromises can be
accepted. Details of a solution with less external components are given in the application
note AN10925.
2. Specification
Table 1 shows the specification for the SSL1523 5 W LED driver.
Specification
Table 1.
Parameter
Specification
Comment
AC line input voltage
100 V (AC) to 254 V (AC)
board has been optimized for 230 V (AC) or
120 V (AC) ± 10 % variation
Output voltage (LED voltage)
19 V (nominal): 12 V to 25 V
range
-
Output voltage protection
33 V (DC)
-
Output current (LED current)
200 mA up to 250 mA
adjustable with potentiometer
Input voltage/load current dependency ± 1 % in the range 100 V (AC) to the maximum output power is not exceeded
130 V (AC) ± 1 % in the range
210 V (AC) to 254 V (AC)
Output voltage/load current dependency ± 4 %/Volt in regulated range
the maximum output power is not exceeded;
see graphs Figure 9 and Figure 10.
Current ripple
± 75 mA ± 30 %
5 W
at 250 mA
Maximum output power (LED power)
Efficiency
at Vout = +19 V
>80 %
at Tamb = 25 °C, Vout = +19 V; see graphs
Figure 11 and Figure 12.
Power Factor:
120 V (AC)
0.98
at 5 W output power; 19 V, Vout = +19 V
-
230 V (AC)
0.90
Switching frequency
90 kHz to 110 kHz
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SSL1523 5 W LED driver
Table 1.
Specification …continued
Parameter
Specification
50 mm × 86 mm × 1.6 mm
0 °C to 85 °C
Comment
Board dimensions
Operating temperature
Isolation voltage
-
-
± 4 kV
between the primary and secondary circuits
3. Demo board views
019aaa132
Fig 1. Demo board top
019aaa133
Fig 2. Demo board bottom
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SSL1523 5 W LED driver
4. Demo board connections
The demo board can be operated from mains voltages of 120 V (AC) (60 Hz) up to
230 V (AC) (50 Hz). The board is designed to work with multiple high power LEDs with a
total working voltage of 12 V to 25 V. The output current can be set by resistor R18, see
Section 7. A dedicated LED load connected to K3 can be supplied on request. The
connector K2 can be used to attach other LED loads. The output voltage is limited to a
maximum of 33 V. When attaching a LED load to an operational board (hot plugging), an
inrush peak current will occur due to discharge of capacitor C10. After (some)
discharge(s), the LEDs may deteriorate and/or become damaged.
control input from
external opto coupler
pin 2: − pin 1: +
pin 2: LED −
pin 1: L
pin 2:
K4
K1
pin 1: LED +
pin 3: N
K2
K3
J1
J2
pin 6: LED −
pin 5: LED −
pin 4: LED −
pin 3: LED +
pin 2: LED +
pin 1: LED +
019aaa134
Fig 3. Demo board connection diagram
4.1 Connecting the demo board:
• If a galvanic isolated transformer is used, this should be placed between the AC
source and the demo board.
• Connect a user-defined LED (string) to the connector K2 as shown in Figure 3. Make
sure that the anode of the LED (string) is connected to + (bottom side of this
connector).
5. Functional description
The SSL1523 IC (Ref. 3) has several internal functions which include the following:
• The SSL1523 controls and drives the flyback converter.
• Over Current Protection (OCP) of the internal FET at 0.5 V on the SOURCE pin.
• The converter frequency is set with an internal oscillator, the timing of which is
controlled by external RC components on pin RC.
• The REG pin controls the on-time of the internal switch between 0 % and 75 %.
This board is optimized to operate at a power factor of 0.9 in the nominal application with
six LEDs on the output. In order to achieve this, the converter operates dominantly at a
constant ton mode. The output power of the converter is buffered by capacitor C10, and
therefore the circuit exhibits resistive input current behavior (see Figure 4).
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UM10406
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SSL1523 5 W LED driver
The input circuit of the converter must be equipped with a filter that is partially capacitive,
in order to address the EMC requirements (see Figure 5). The combination of C1, L1 and
C2 make a filter that blocks most of the disturbance generated by the converter input
current. This filter is designed to have a limited capacitive load, so a good power factor
can be achieved. For this design, two 150 nF capacitors are incorporated, resulting in a
power factor of at least 0.9 for the nominal condition with six LEDs connected at 5 W
output power.
019aaa135
Fig 4. Mains current (C2), VCC (C1), bulk capacitor input voltage (C3) and the mains voltage (C4)
The board is equipped with a feedback loop to regulate the output current. This feedback
loop senses the LED current over sense resistor R10, and a current mirror is made from
transistors Q10a/Q10b. Using R18, the current level can then be set. The same feedback
loop is also used to provide overvoltage protection. If the LED voltage exceeds 33 V, a
current through R17 and D11, D12 and D13 will start running. The current through the
opto coupler IC2 will pull up the REG pin. At values above 2.7 V, the ‘on time’ of the
internal MOSFET is zero. The feedback loop has a proportional, and partially integrated
action. The gain is critical due to the phase shift caused by the converter and the output
capacitor C10. Increased gain will make the feedback loop intrinsically unstable.
The accuracy of the resulting output current will satisfy the requirements of the majority of
the 5 W LED applications with four to eight LEDs connected in series. The demo board
can be controlled by connecting the floating output of an external opto coupler (TCDT1124
or equivalent) to K4.
The demo board can be switched on and off by switching the external opto coupler.
Controlling the LED current is another option. The LED current can be regulated by
applying a PWM signal to the external input with a frequency up to 1 kHz. The PWM
frequency can be synchronized with the ripple frequency on the buffer capacitor C1 for an
optimal mains input current shape.
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SSL1523 5 W LED driver
6. Board system optimization
To meet specific customer application requirements, the modifications described in the
following sections are possible.
6.1 Changing the output current and LED current
One of the major advantages of a flyback converter over other topologies, is its suitability
for driving LED configurations with a broad range of voltages. Essentially, changing the
winding ratio whilst maintaining the value of the primary inductance, will shift the output
working voltage accordingly. Part of the efficiency of the driver is linked to the output
voltage. A lower output voltage will require increased transformation ratio, and will cause
higher secondary losses. In practice, a mains operated flyback converter will have an
efficiency > 80 % for high output voltages (like 40 V) down to 50 % for very low output
voltages < 3 V. At low voltages, synchronous rectification becomes advisable to reduce
rectification losses.
The NXP TEA 1761/TEA1762 can be used for this purpose, see Ref. 1. For exact
calculations of transformer properties and peak current, refer to Ref. 2 application note
AN10754, “How to design an LED driver using the SSL2101”, see Ref. 2.
6.2 Changing the output ripple current
The output ripple current is mostly determined by the LED voltage, the LED dynamic
resistance and the output capacitor. The present value of C10 has been chosen to
optimize the capacitor size under typical load. The resulting ripple of ± 30 % will result in
an expected deterioration of light output < 1 %.
The size for the buffer capacitor (C10) can be estimated from Equation 1:
I
1
----- ----------------------------------------
C10
=
⋅
(1)
ΔI 2πfnet ⋅ Rdynamic
Using a series of LEDs, the dynamic resistance of each LED can be multiplied by the
number of LEDs. The current sense resistor (R10) should also be included in this
calculation.
Example: For a ripple current of ± 30 %, and a mains frequency of 50 Hz, and a total
dynamic resistance of 7 Ω, the resulting capacitance value will be 3.3333 / (314*7) =
1500 μF. The capacitor must be specified for the HF switching related ripple current of
about 0.35 times the average effective LED current (ILED(AV)). For high lifetime
applications, the ripple current specification of the electrolytic capacitor must be
increased. For details, please contact the capacitor supplier.
6.3 Changing the load curve
The current load curve can be divided into the following two regions:
• Where the current control loop regulates the output current, the constant current
output
• Where the IC limits the peak input current of the converter, the constant power output
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UM10406
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SSL1523 5 W LED driver
The constant power output occurs at output voltages above 23 V combined with an output
power exceeding 5 W, see also Section 9, Figure 9. In this area, constant output power
becomes the dominant control mechanism. At very low output voltages, the feedback loop
will become non-functional, resulting again in constant output power mode. An output
short-circuit will cause an output current of about 1 A, resulting in increased stress on the
transformer TX1, shunt resistor R10, the output diode D10, and the snubber diode D3.
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7. Board schematic
L1
R1
1 mH
K3-1
K3-2
K3-3
K3-4
K3-5
13R105C
33 Ω, 2 W
D1
RMB6S
+
1
2
K1
C1
150 nF
400 V
C2
150 nF
400 V
F1
3
4
D2
P6KE400A
2
1
FUSE
TIME-LAG, 1A
D3
P6KE200A
−
TX1
760871038-E13
120 V(AC)
to
230 V(AC)
HGND
HGND
HGND
HGND
K3-6
K2
D4
HER107
D10
L10
R10
1
2
3
2
1
4
7
6
10 μH, 2.6 A
744772100
1 Ω, 1 W
SB1H100
D5
R2
100 Ω
C11
1 μF
35 V
C10
R11
220 Ω
R12
220 Ω
12 V(DC)
to
25 V(DC)
1500 μF
35 V
HER107
C12
C3
1 μF
35 V
VCC
DRAIN
n.c.
D6
BZV55-C30
R4
220 kΩ
1 μF, 35 V
1
2
3
8
7
R7
120 kΩ
GND
RC
C15 Y-Type
D11
SSL152X
8RC
AUX
BZV55-C22
1 nF, 250 V AC
6
5
R6
REG
4
HGND
SGND
47 kΩ
R5
20 kΩ
C4
330 pF
R3
6.8 kΩ
Q10
IC1
R8
2.4 Ω
R9
2.4 Ω
BCM857DS,115
Q11
BC857
R17
D13
BZV55-C6v2
1 kΩ
D12
HGND
1N4148W-V-GS08
R20
C13
6.8 μF
R16
6.2 kΩ
R15
10 kΩ
R14
10 kΩ
R13
1 kΩ
10 kΩ
IC2
TCDT1124
3
2
K4
R18
4.7 kΩ
R19
10 kΩ
1
2
1
CONTROL INPUT
SGND
019aaa136
Fig 5. Demo board schematic
UM10406
NXP Semiconductors
SSL1523 5 W LED driver
7.1 Bill of materials (BOM)
Table 2.
Bill of materials
Part Description
no.
Value
PCB footprint
Supplier Art no.
Manufacturer Manufacturer part no.
C1
C2
C3
capacitor
capacitor
capacitor
150 nF 400 V
150 nF 400 V
1 μF 35 V
-
Farnell
Farnell
Farnell
Farnell
-
9752838
9752838
1611920
1611920
-
-
-
-
-
-
B32562J6154K
B32562J6154K
GMK107BJ105KA-T
GMK107BJ105KA-T
-
-
0603
0603
0603
C11 capacitor
1 μF 35 V
C4
capacitor CPO 330 pF 5 %
NGO
C10 capacitor low
ESR
1500 μF 35 V
pitch = 5 mm
Farnell
Farnell
Farnell
-
1219477
1611920
1572632
3531971
Panasonic
-
EEUFM1V152L
C12 capacitor low
ESR
1 μF 35 V
0603
0805
-
GMK107BJ105KA-T
C0805C106K8PAC-TU
DE1E3KX102MA5B
C13 capacitor
6.8 μF 10 V
Kemet
Murata
C15 Y-CAP
Y-CAP 1 nF
250 V (AC)
D1
D2
diode bridge
TVS
MB6S
-
-
1621770
1578842
Multicomp
-
-
-
P6KE400A
DO15
Farnell
D3
D4
TVS
P6KE200A
HER107
DO15
DO41
Farnell
Farnell
1017750
9565191
9565191
Multicomp
Multicomp
Multicomp
-
-
diode fast
D5
D6
diode fast
HER107
DO41
Farnell
Farnell
Farnell
-
-
-
Zener diode
BZV55-C30
SOD80C
DO41
1081362RL NXP
D10 diode Schottky SB1H100
9550364
Vishay
D11 Zener diode
D12 diode standard 1n4148
D13 Zener diode
BZV55-C22
SOD80C
SMD
Farnell
Farnell
Farnell
1097189
1469425
1757832
1637535
-
NXP
Vishay
NXP
Schurter
NXP
-
-
-
BZX384-B6V2 SOD-323
BZX384-B6V2
34.6915
SSL1523
-
F1
fuse
1 A 250 V
SSL1523
TCDT1124
pitch = 5.08 mm Farnell
IC1
IC2
SSL1523
-
-
-
opto coupler
CTR 160 320 %
isolation =
Farnell
1045415
class II
K1
K2
K3
K4
L1
connector
connector
connector
connector
coil
-
-
-
-
pitch = 5.08 mm Farnell
pitch = 5.08 mm Farnell
pitch = 2.54 mm Farnell
pitch = 5.08 mm Farnell
1131853
1131853
1668357
1131853
1710434
Weidmuller
Weidmuller
Samtec
PM5.08/2/90
PM5.08/2/90
SSW-106-02-G-S-RA
PM5.08/2/90
-
Weidmuller
1 mH -
13R105C
pitch = 2 E
Farnell
13R105C
Murata
L10
coil
10 μH 2.6 A
pitch = 5 mm
-
-
Wuerth
744772100
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SSL1523 5 W LED driver
Table 2.
Bill of materials …continued
Q10 dual transistor BCM857DS
PNP
SC-74 (TSOP6) Farnell
SOT457
1757904
NXP
BCM857DS
Q11 transistor PNP BC857
SMD
-
-
-
-
-
R1
R2
R3
R4
R5
R6
R7
R8
resistor
resistor
resistor
resistor
resistor
resistor
resistor
33 Ω 2 W
100 Ω
Farnell
1565460
Welwyn
-
0603
0603
0603
0603
0603
0805
1206
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
6.8 kΩ
220 kΩ
20 kΩ
MC34751
-
-
-
-
-
47 kΩ
120 kΩ
2.4 Ω
resistor not
wirewound
R9
resistor not
wirewound
2.4 Ω
1206
-
-
-
-
-
R10 current sense
resistor not
1 Ω 1 W 1 %
Farnell
5383894
RCD
Components
F1S 1R
wirewound
R11 resistor
R12 resistor
R13 resistor
R17 resistor
R14 resistor
R15 resistor
R19 resistor
R20 resistor
R16 resistor
220 Ω 1 %
220 Ω 1 %
1 kΩ
0603
0603
0603
0603
0603
0603
0603
0603
0603
-
-
-
-
-
-
-
-
-
-
-
-
1 kΩ 1 %
10 kΩ 1 %
10 kΩ 1 %
10 kΩ
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
10 kΩ
-
-
-
-
6.2 kΩ 1 %
-
-
-
-
R18 variable resistor 4.7 kΩ
potentiometer
leaded
Farnell
1227568
Tyco
CB10MV472ME
TX1 transformer 760871038
EE13
Wuerth
760871038 Wuerth
760871038
8. Transformer specification
Figure 6 shows the transformer schematic:
3
N1
2
7
6
N2
1
N3
4
019aaa137
Fig 6. Transformer schematic
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SSL1523 5 W LED driver
8.1 Winding specification
1 mm on pin 1 - 4 side
N1 (2-3):
N2 (7-6):
N1 (2-3):
N3 (1-4):
AWG39
AWG26 TIW
AWG39
AWG35
bobbin
019aaa138
tape
Fig 7. Winding specification
Table 3.
Winding
Winding specification
Section
N1 : N2
N1 : N3
Ratio
Primary to secondary
Primary to auxiliary
1 : 0.173
1 : 0.204
8.2 Electrical characteristics
Table 4.
Section
N1
Inductance
Inductance
1.85 mH ± 5 %
56 μH
N2
N3
75 μH
• Nominal frequency = 100 kHz
• Vbreakdown N1, N2 = 4 kV and N3, N2 = 4 kV
• Leakage inductance = 20 μH (short N2)
8.3 Core and bobbin
• Core: EE13/6/6 (3C90 or better)
• Air gap in centre leg
• Bobbin: for EE13/6/6 core; bobbin must be suitable for Class II isolation requirements.
8.4 Physical dimensions
15 mm
15.75 mm
18.5 mm
019aaa139
Fig 8. Transformer dimensions
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9. Appendix
9.1 Load curves
019aaa140
275
(1)
LED
current
(mA)
225
175
125
(2)
(3)
12
16
20
24
28
LED voltage (V)
(1) LED current = 250 mA.
(2) LED current = 200 mA.
(3) LED current = 150 mA.
Fig 9. 120 V (AC) load curve at VLED = 19.5 V
019aaa141
275
(1)
LED
current
(mA)
225
(2)
175
(3)
125
12
16
20
24
28
LED voltage (V)
(1) LED current = 250 mA.
(2) LED current = 200 mA.
(3) LED current = 150 mA.
Fig 10. 230 V (AC) load curve at VLED = 19.5 V
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SSL1523 5 W LED driver
9.2 Efficiency curves
019aaa142
0.84
η
(%)
0.80
0.76
0.72
(1)
(2)
(3)
12
16
20
24
28
LED voltage (V)
(1) LED current = 250 mA.
(2) LED current = 200 mA.
(3) LED current = 150 mA.
Fig 11. 120 V (AC) efficiency curve
019aaa143
0.84
η
(%)
0.80
0.76
0.72
(1)
(2)
(3)
12
16
20
24
28
LED voltage (V)
(1) LED current = 250 mA.
(2) LED current = 200 mA.
(3) LED current = 150 mA.
Fig 12. 230 V (AC) efficiency curve
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9.3 Input voltage dependency
019aaa144
254
lout
(mA)
252
(1)
250
248
246
70
110
150
190
230
270
Umains (V)
(1) LED current set at 250 mA nominal with a load of six LEDs in series (19.5 V).
Fig 13. Input voltage versus output current
9.4 EMC requirements
NXP Semiconductors
04.Dec 09 17:52
RBW
MT
9
1
kHz
ms
Marker
1
[T2
48.64 dB
]
V
Att 10 dB
100 kHz
PREAMP OFF
9.000000000 kHz
dB
1
V
100
90
1
MHz
10 MHz
SGL
PK
MAXH
80
70
60
2
AV
CLRWR
FCC15AVQ
FCC15BVQ
1
50
40
30
20
6DB
10
0
9
kHz
30 MHz
019aaa145
Fig 14. EMC measurements at a mains voltage of 120 V (AC)
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SSL1523 5 W LED driver
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04.Dec 09 16:48
RBW
MT
9
1
kHz
ms
Marker
1
[T2
50.66 dB
]
V
Att 10 dB
100 kHz
PREAMP OFF
9.000000000 kHz
dB
1
V
100
EN55015Q
1
MHz
10 MHz
LIMIT CHECK
PASS
90
80
70
60
SGL
PK
MAXH
2
AV
CLRWR
1
EN55015A
50
40
3
6DB
20
10
0
9
kHz
30 MHz
019aaa146
Fig 15. EMC measurements at a mains voltage of 230 V (AC)
9.5 Mains conducted harmonics
Table 5.
Mains conducted harmonics
230 V (AC) @ 50 Hz amplitude
Harmonic
120 V (AC) @ 60 Hz amplitude
1
100
0
100
0
2
3
11.0
0
8.1
0
4
5
12.5
0
14
0
6
7
11.7
0
2.7
0
8
9
7.7
0
1.2
0
10
11
12
13
14
15
16
17
5.0
0
2.1
0
7.4
0
2.4
00
2.4
0
3.0
0
7.6
1.5
UM10406
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User manual
Rev. 01 — 3 August 2010
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NXP Semiconductors
SSL1523 5 W LED driver
Table 5.
Mains conducted harmonics …continued
Harmonic
230 V (AC) @ 50 Hz amplitude
120 V (AC) @ 60 Hz amplitude
18
19
20
0
0
1.1
0
3.4
0
Table 6.
Parameter
THD
Total Harmonic Distortion and Power Factor
230 V (AC) @ 50 Hz amplitude
27.1
120 V (AC) @ 50 Hz amplitude
21.6
0.98
Power Factor (PF)
0.90
10. References
[1] TEA1761/TEA1762 — NXP GreenChip controllers
for synchronous rectification.
[2] AN10754 — How to design an LED driver using the SSL2101 or SSL2102.
[3] SSL152x — Datasheet - SMPS ICs for mains LED drivers.
UM10406
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
User manual
Rev. 01 — 3 August 2010
17 of 21
UM10406
NXP Semiconductors
SSL1523 5 W LED driver
11. Legal information
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.
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.
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.
11.2 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.
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 national authorities.
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.
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.
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.
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.
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.
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.
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 accepts 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.
11.3 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
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
UM10406
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
User manual
Rev. 01 — 3 August 2010
18 of 21
UM10406
NXP Semiconductors
SSL1523 5 W LED driver
12. Tables
Table 1. Specification . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Table 2. Bill of materials . . . . . . . . . . . . . . . . . . . . . . . .10
Table 3. Winding specification . . . . . . . . . . . . . . . . . . . .12
Table 4. Inductance . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Table 5. Mains conducted harmonics . . . . . . . . . . . . . .16
Table 6. Total Harmonic Distortion and Power Factor . .17
continued >>
UM10406
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© NXP B.V. 2010. All rights reserved.
User manual
Rev. 01 — 3 August 2010
19 of 21
UM10406
NXP Semiconductors
SSL1523 5 W LED driver
13. Figures
Fig 1. Demo board top. . . . . . . . . . . . . . . . . . . . . . . . . . .4
Fig 2. Demo board bottom. . . . . . . . . . . . . . . . . . . . . . . .4
Fig 3. Demo board connection diagram. . . . . . . . . . . . . .5
Fig 4. Mains current (C2), VCC (C1), bulk capacitor
input voltage (C3) and the mains voltage (C4) . . .6
Fig 5. Demo board schematic . . . . . . . . . . . . . . . . . . . . .9
Fig 6. Transformer schematic . . . . . . . . . . . . . . . . . . . .11
Fig 7. Winding specification. . . . . . . . . . . . . . . . . . . . . .12
Fig 8. Transformer dimensions . . . . . . . . . . . . . . . . . . .12
Fig 9. 120 V (AC) load curve at VLED = 19.5 V . . . . . . .13
Fig 10. 230 V (AC) load curve at VLED = 19.5 V . . . . . . .13
Fig 11. 120 V (AC) efficiency curve . . . . . . . . . . . . . . . . .14
Fig 12. 230 V (AC) efficiency curve . . . . . . . . . . . . . . . . .14
Fig 13. Input voltage versus output current . . . . . . . . . . .15
Fig 14. EMC measurements at a mains voltage
of 120 V (AC). . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Fig 15. EMC measurements at a mains voltage
of 230 V (AC). . . . . . . . . . . . . . . . . . . . . . . . . . . .16
continued >>
UM10406
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
User manual
Rev. 01 — 3 August 2010
20 of 21
UM10406
NXP Semiconductors
SSL1523 5 W LED driver
14. Contents
1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1
2
General description . . . . . . . . . . . . . . . . . . . . . 3
Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Demo board views. . . . . . . . . . . . . . . . . . . . . . . 4
Demo board connections . . . . . . . . . . . . . . . . . 5
Connecting the demo board: . . . . . . . . . . . . . . 5
Functional description . . . . . . . . . . . . . . . . . . . 5
3
4
4.1
5
6
Board system optimization. . . . . . . . . . . . . . . . 7
Changing the output current and LED current . 7
Changing the output ripple current . . . . . . . . . . 7
Changing the load curve. . . . . . . . . . . . . . . . . . 7
6.1
6.2
6.3
7
Board schematic . . . . . . . . . . . . . . . . . . . . . . . . 9
7.1
Bill of materials (BOM) . . . . . . . . . . . . . . . . . . 10
8
Transformer specification. . . . . . . . . . . . . . . . 11
Winding specification . . . . . . . . . . . . . . . . . . . 12
Electrical characteristics. . . . . . . . . . . . . . . . . 12
Core and bobbin. . . . . . . . . . . . . . . . . . . . . . . 12
Physical dimensions. . . . . . . . . . . . . . . . . . . . 12
8.1
8.2
8.3
8.4
9
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Load curves . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Efficiency curves. . . . . . . . . . . . . . . . . . . . . . . 14
Input voltage dependency. . . . . . . . . . . . . . . . 15
EMC requirements . . . . . . . . . . . . . . . . . . . . . 15
Mains conducted harmonics. . . . . . . . . . . . . . 16
9.1
9.2
9.3
9.4
9.5
10
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
11
Legal information. . . . . . . . . . . . . . . . . . . . . . . 18
Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 18
11.1
11.2
11.3
12
13
14
Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 B.V. 2010.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 3 August 2010
Document identifier: UM10406
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