Fairchild FL103M service manual
www.fairchildsemi.com
Application
Fairchild Device
Input Voltage
Range
Rated Output
Power
Output Voltage
(Rated Current)
LED Illumination
FL103M
85-265VAC
8.4W
24V (0.35A)
R201
24K/3216
R101
100K/3216
N
L
L101
1mH
+
C101
10uF/400V
+
C102
10uF/400V
LED+
LED-
U101
FL103
VDD
3
HV
8
NC
7
GND6NC
4
CS
1
GATE
2
VS
5
+
C201
100uF/35V
C106
2.2n
L102
Short
R102
120K/3216 C103
4.7n/1kV
D101
1N4007
D102
1N4007
D201
ES2D(200V/2A)
+
C104
10uF/50V
T101
5
1
2
4
10
9
Q101
2N60R103
10R/2012
R104
100R/2012
R108
2R2/3216
R107
2R2/3216
R105
120K/2012
R106
22K/2012
C105
47pF/2012
MB6S(600V/0.5A)
BD101
N1-
4
+3L
2
F1
250V/1A
Fairchild Reference Design
The following reference design supports inclusion of FL103M in design of LED
illumination. It should be used in conjunction with the FL103M datasheet as well as
Fairchild’s application notes and technical support team. Please visit Fairchild’s website
at http://www.fairchildsemi.com.
Key Features
Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-
Feedback Circuitry
Low EMI through Frequency Hopping
Low Power Consumption in Standby
Protection Functions: UVLO, Over-Voltage, Over-Current, and Over-Temperature
1. Schematics
© 2011 Fairchild Semiconductor Corporation 1 RD-L015_FL103M • Rev. 1.0.2
Figure 1. Schematic
www.fairchildsemi.com
4
5
3
1
7
10
2
Np1
0.20φ * 1
76T
Np2
0.20φ * 1
41T
Ns
0.32φ(TEX) * 1
39T
Na
0.13φ * 1
27T
Primary
2
3
Secondary
Tape 3T
10
Tape 3T
Tape 3T
Tape 3T
3
1
4
5
Np1
Na
7
Ns
Np2
No.
Winding
Pin (S F)
Wire
Turns
Winding Method
1
Np1
2 3
0.20 Φ * 1
76
Solenoid Winding
2
Insulation: Polyester Tape t = 0.05 mm, 3 Layers
3
Ns
10 7
0.32 Φ (TEX) * 1
39
Solenoid Winding 4 Insulation: Polyester Tape t = 0.05 mm, 3 Layers
5
Np2
3 1
0.20 Φ * 1
41
Solenoid Winding
6
Insulation: Polyester Tape t = 0.05 mm, 3 Layers
7
Na
4 5
0.13 Φ * 1
27
Center Solenoid winding
8
Outer Insulation: Polyester Tape t = 0.05 mm, 3 Layers
Pin
Specification
Remark
Inductance
4 - 5
1.13mH ± 7%
1kHz, 1V
Leakage
4 - 5
Max. 20uH
Short all output pins
2. Transformer
2.1. Transformer Schematic Diagram
2.2. Winding Specification
Core: EE1614S (PC-40)
Bobbin: 10 Pins
2.3. Electrical Characteristics
© 2011 Fairchild Semiconductor Corporation 2 RD-L015_FL103M • Rev. 1.0.2
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