AN2451
Board description
Doc ID 12791 Rev 3
15/55
Figure 8.
Power supply schematic
4
3
N
P
Vcc
Vcc
FB
Vdd
DRAIN
S
AC INPUT
85 V ac to 256 V ac
DC OUTPUT
12 V dc
TEST PADS
C10
2.2 nF
C10
2.2 nF
1
4
3
2
8
5
T1T1
1
2
3
Q1Q1
L1
1 mH
L1
1 mH
C6
10 uF
C6
10 uF
C7
47 nF
C7
47 nF
+
C8
470uF 16V
+
C8
470uF 16V
R2
220k
R2
220k
R5
1k5
R5
1k5
R1
10R 1W
R1
10R 1W
L3
470uH
L3
470uH
2
1
D4D4
R3
10 K
R3
10 K
1
3
2
D5
10V
D5
10V
+
C3
10uF 400V
+
C3
10uF 400V
L4
33 uH
L4
33 uH
1
2
4
3
U2U2
2
4
1
3
6
5
7
8
U1U1
4
1
3
2
-+
D1
BRIDGE
-+
D1
BRIDGE
+
C2
10uF 400V
+
C2
10uF 400V
1
3
D3D3
C4
470pF 630V
C4
470pF 630V
D6
LED
D6
LED
C5
220 pF
C5
220 pF
1
2
CN1CN1
F1
T - 2A
F1
T - 2A
D2D2
6
10
5
1
L2L2
C1
33nF X2
C1
33nF X2
C29
47uF 16V
C29
47uF 16V
VccVcc
VssVss
R4
560
R4
560
C9
47uF 16V
C9
47uF 16V
HIGH
VOLTAGE
SECTION
