5 4 3 2 1

D6
1N4005

D D

DZ
12V D8
1N4005
C3
1uF
50V
C7

3
0.1u
630V

Drain Vdd

SourceFb
U1

Source
Cx C4

Drain
Drain
Drain
VIPer12A .022 0.47
50V
R0 D1
10 1N4007 L1
1/2W L0 12V @ 100mA

8
7
6
5

1
2
C C

470uH 1mH
J1
DZ1 J2
1 90 TO 264 vAC R1 1K C6 16V
2 D5 47uF 2
C1 C2 STTH1L06 50V 1
2 pin 4.7uF 4.7uF
400V 400V 2 pin

0
B B

Jumper = open
L2 = short circuit
D7 = short circuit
C5 = open

STMicroelectronics John S. Lo Giudice

1300 East Woodfield Road, Suite 410
A
Schaumburg, IL 60173 A

Title
VIPer12 Buck nonisolated 12V @ 100mA
Size Document Number Rev
A Viper12 Buck.opj B
Date: Tuesday, April 13, 2004 Sheet 1 of 1
5 4 3 2 1
VIPer12 Buck nonisolated 12V @ 100mA Revised: Tuesday, April 13, 2004
Viper12 Buck.opj Revision: B

STMicroelectronics John S. Lo Giudice

1300 East Woodfield Road, Suite 410
Schaumburg, IL 60173

Bill Of Materials April 28,2004 15:58:52 Page1

Item Qty Ref Part tolerance part #

______________________________________________

1 1 Cx .022 50V
2 2 C2,C1 4.7uF 400V Ltec TKR2GM4R7G16O
3 1 C3 1uF 50V
4 1 C4 0.47 25V
5 1 C6 47uF 50V Low ESR
6 1 C7 0.1u 630V TDK C4532X7R2J104MT
7 1 DZ 12V zener 1N5242
8 1 DZ1 16V zener 1n5246
9 1 D1 1N4007
10 1 D5 STTH1L06 ST
11 2 D6,D8 1N4005
12 1 J1 2 pin dk 277-1236
13 1 J2 2 pin Mouser 651-1751099
14 1 L0 470uH JW Miller 5300-33
15 1 L1 1mH JW Miller PL895-102K
16 1 R0 10 1/2W
17 1 R1 1K
18 1 U1 VIPer12A ST