viper20b STMicroelectronics, viper20b Datasheet - Page 10

• Manufacturer Part Number: viper20b
• Description: Smps Primary I.c.
• Manufacturer: STMicroelectronics

VIPer20B / VIPer20BSP
10/17
Figure 10: Off Line Power Supply With Auxliary Supply Feedback
Figure 11: Off Line Power Supply With Optocoupler Feedback
AC IN
ACIN
F1
R9
F1
R9
C1
R2
C5
C1
TR2
R2
C5
TR2
OSC
OSC
13V
VDD
13V
VDD
BR1
-
+
BR1
C2
C4
C11
-
+
D3
C2
C4
COMP SOURCE
C11
D3
COMP SOURCE
D1
R7
R1
R3
C6
DRAIN
D1
R7
C3
R1
R3
C6
DRAIN
C 3
VIPer
VIPer
TR1
TR1
U2
ISO1
D2
C7
R6
D2
C 7
C1 0
C1 0
C8
R4
R5
FC00402
L2
L2
C9
C9
+Vcc
GND
+Vcc
GND
FC 00412