IC1 FOD2741C
0.7 TO C 15V 0.1 6F 50V
2 C5 22 F 10V
+ 3 MMBT5087 Q1 R1 100k
1 D1 MMBD4148
4
T1 10 7 5 2
Q2 KSD1621STF
IC1 FOD2741C
D2 MMBD4148
11 8
R2 390
C3 22 F 10V
R3 5.6k
6 7
C1 0.1 F 50V C2 0.0022 F 50V
6 3
R4 27k
R5 10k
5 ERROR AMPLIFIER
12 9
9V AT 10 mA
C4 0.1 F 50V
NOTE: T1=COILTRONICS VP1-1400.
Figure 1 This isolated flyback supply powers a digital-voltmeter module from 0.7 to 15V.
edn071203di41661
DIANE
