FSCQ FAIRCHILD [Fairchild Semiconductor], FSCQ Datasheet - Page 2

• Manufacturer Part Number: FSCQ
• Description: Green Mode Fairchild Power Switch (FPS)
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

FSCQ-SERIES
Internal Block Diagram
2
V
FB
4
Vovp
V
V
I
delay
Sync
SD
Vcc
Burst
Soft Start
I
Vref
BFB
Normal Operation
Threshold
Sync
Burst Mode
4.6V/2.6V : Normal QR
3.0V/1.8V : Extended QR
Controller
5
Vref
I
FB
Figure 2. Functional Block Diagram of FSCQ-Series
2.5R
+
-
Burst Switching
Vcc good
R
(Vcc = 9V)
Vref
I
B
Quasi-Resonant
(QR) Switching
Controller
OSC
PWM
S
R
Q
Q
600ns
LEB
S
R
Q
Q
fs
Operation
Auxiliary
Normal
Q
Q
Vref
R
Vcc good
S
Power Off Reset
+
-
AOCP
Vcc
3
Driver
Gate
TSD
9V/15V
Main Bias
Internal
(Vcc = 6V)
Bias
Vocp
Drain
1
2
GND