Data Sheet

© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSQ0365, FSQ0265, FSQ0165, FSQ321 • Rev. 1.0.6 3
FSQ0365/0265/0165/321 — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter
Application Circuit
V
cc
GND
Drain
Sync
Vo
PWM
V
fb
AC
IN
V
str
Figure 1. Typical Flyback Application
Internal Block Diagram
8V/12V
V
ref
S
Q
Q
R
V
CC
V
ref
I
delay
I
FB
V
SD
V
ovp
Sync
V
OCP
S
Q
Q
R
R
3R
V
CC
Good
Vcc
Drain
Vfb
GND
AOCP
Gate
Driver
V
CC
Good
LEB
200ns
PWM
V
Burst
4
Sync
+
-
+
-
0.7V/0.2V
2.5 s Time
Delay
(1.1V)
Soft-
Start
6V
6V
0.35/0.55
+
-
OSC
Vstr
TSD
3
2 8
76
5
FSQ0365RN Rev.00
1
Figure 2. Internal Block Diagram