AMC7660 Datasheet, PDF (8/11 Pages) ADDtek Corp – DC - DC CONVERTER CONTROL CIRCUIT

AMC7660
Co
1000uF
V _OUT
-12V/100mA
D1
Figure 3 – Voltage Inverting Converters
0.24
Rsc
7
953
R2
6
8
OC2
S
1 ^{OC1 Q2}
Q1
100
2
88uH
QR
I sense
C_T
Oscillator
3
1.5nF
1.25V
V _IN
4.5V to 6.0V
100uF
5 ^R1
8.2K
4
Note: For step-up, step-down or voltage inverting applications requiring peak current greater than 1.5A, external boost current circuitry by NPN or
PNP transistors can be used.
Copyright © 2006 ADDtek Corp.
8
DD057_C -- JUNE 2006