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Número de pieza UM10406
Descripción SSL1523 high power factor 5W LED driver
Fabricantes NXP Semiconductors 
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UM10406
SSL1523 high power factor 5 W LED driver for universal
mains
Rev. 01 — 3 August 2010
User manual
Document information
Info Content
Keywords
SSL1523, SSL152x family, LED driver, mains supply, AC/DC conversion
Abstract
This user manual describes a demonstration (demo) board for a mains
operated non-dimmable 5 W LED driver using the SSL1523 SMPS
controller IC.
http://www.DataSheet4U.net/
datasheet pdf - http://www.DataSheet4U.net/

1 page




UM10406 pdf
NXP Semiconductors
UM10406
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.
pin 1: L
pin 2:
pin 3: N
K1
control input from
external opto coupler
pin 2: pin 1: +
pin 2: LED
K4
pin 1: LED +
K2
K3
pin 6: LED
pin 5: LED
pin 4: LED
pin 3: LED +
pin 2: LED +
pin 1: LED +
J1
J2
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Fig 3. Demo board connection diagram
019aaa134
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
UM10406
User manual
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).
All information provided in this document is subject to legal disclaimers.
Rev. 01 — 3 August 2010
© NXP B.V. 2010. All rights reserved.
5 of 21
datasheet pdf - http://www.DataSheet4U.net/

5 Page





UM10406 arduino
NXP Semiconductors
UM10406
SSL1523 5 W LED driver
Table 2. Bill of materials …continued
Q10 dual transistor BCM857DS
PNP
SC-74 (TSOP6) Farnell
SOT457
Q11 transistor PNP BC857
SMD
-
R1 resistor
33 Ω 2 W
-
Farnell
R2 resistor
100 Ω
0603
-
R3 resistor
6.8 kΩ
0603
-
R4 resistor
220 kΩ
0603
-
R5 resistor
20 kΩ
0603
-
R6 resistor
47 kΩ
0603
-
R7 resistor
120 kΩ
0805
-
R8 resistor not
wirewound
2.4 Ω
1206
-
R9 resistor not
wirewound
2.4 Ω
1206
-
R10 current sense
resistor not
wirewound
1Ω1W1%
-
Farnell
R11 resistor
220 Ω 1 %
0603
-
R12 resistor
220 Ω 1 %
0603
-
R13 resistor
1 kΩ
0603
-
R17 resistor
1 kΩ 1 %
0603
-
R14 resistor
10 kΩ 1 %
0603
-
http://www.DataSheet4U.net/
R15 resistor
10 kΩ 1 %
0603
-
R19 resistor
10 kΩ
0603
-
R20 resistor
10 kΩ
0603
-
R16 resistor
6.2 kΩ 1 %
0603
-
R18 variable resistor 4.7 kΩ
potentiometer Farnell
leaded
TX1 transformer
760871038
EE13
Wuerth
1757904 NXP
-
1565460
-
-
-
-
-
-
-
-
Welwyn
-
-
-
-
-
-
-
--
5383894
RCD
Components
-
-
-
-
-
-
-
-
-
1227568
-
-
-
-
-
-
-
-
-
Tyco
760871038 Wuerth
BCM857DS
-
-
-
MC34751
-
-
-
-
-
-
F1S 1R
-
-
-
-
-
-
-
-
-
CB10MV472ME
760871038
8. Transformer specification
Figure 6 shows the transformer schematic:
3
N1
2
1
N3
4
Fig 6. Transformer schematic
7
N2
6
019aaa137
UM10406
User manual
All information provided in this document is subject to legal disclaimers.
Rev. 01 — 3 August 2010
© NXP B.V. 2010. All rights reserved.
11 of 21
datasheet pdf - http://www.DataSheet4U.net/

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