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© 2007 Fairchild Semiconductor Page 7 of 17 Rev 1.1 April 2007
www.fairchildsemi.com
3. Designed Solution
3.1 Schematic
Figure 3: Schematic of the FEB157 Offline High Brightness LED Driver Board
F1
1A, 250V
C1
0.1µF
R1
5.6Ω
1W
C2
47µF
450V
R7
22Ω
0805
Q1
FQD2N80
R10
10kΩ
1%
0603
Vref Vcc Drive GND
8765
1234
FB S/S IS Rt/Ct
C8
1µF
C7
0.1µF
C10
470pF
C9
1800pF
D3
BAS21
R9
4.7Ω
0805
C4
47µF
50VZD1
18 V
C5
0.1µF
R12
1.2Ω
2512
R11
1kΩ
0805
D1
RS1M
C3
1000pF
1kV
R2
22kΩ
2010
R3
22kΩ
2010
R4
10Ω
1206
C6
0.01µF
R5
150kΩ
2010
R6
150kΩ
2010
R8
10kΩ
0603
D2
Prov. for MMBD4148
D4
SS39
C11
1000µF
16V
L1
2.2µH
C12
47µF
50V
R14
1.8Ω, 2010
R15
2Ω, 2010
R16
1.8Ω
2010
Q2
MMBT2222AK
RTH1
10kΩ
0805
R17
510Ω
0603
C13
2200pF
Y-cap
R18
100Ω
0603
BD1
DF10S
FAN7554D IC1
IC2
FOD817A
IC2
FOD817A
LF1
R13
Prov. for 2512
3
2
1
Lm = 610µH
T1
EFD20 Core/Bobbin
4
5
8
1
2
5
6
J2
JP1
JP2
R19
Prov. for 2010
C14
Prov. for 0805
ZD2
Prov. for SOD-123
Q3
MMBT2222A
R20
1kΩ
2010
TP2
TP1
TP3
TP4
TP5
TP6
2
3
C15
100pF
R21
47Ω
2010