iW1688
Low-Power Off-line Digital PWM Controller
11.0 Application Circuit
L1
3.9mH
L2
7µH
R13
D9
SB340
Optional
10�ꢀ1W
L
+5V, 1A
R4
C3
1nF/1kV
R1
C7
680µF
10V
C8
100µF
25V
100k�
+
+
R7
C10
100nF
2.4M�
+
1k�
R5
C2
+
C1
4.7µF
400V
+
D5
UF4006
R2
220�
4.7µF
400V
GND
2.4M�
D1 - D4
N
R3
D7
HER102
1.2M�
R6
R11
D8
1N4148
R9
100�
10k�
Q1
ST1NC60
100�
+
47µFꢀ25V
4
3
2
1
R10
V
V
OUTPUT
GND
CC
+
R8
C7
2.2µF
25V
56k�
C5
7.87k�
470nF
5
V
IN
SENSE
U1
iW1688
R12
C6
470pF
2.2k�
Figure 11.0.1. Typical Application Circuit
MK-4AA003-E
03/16/06
PAGE 15
PRELIMINARY