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FSCQ1265RT Datasheet(PDF) 2 Page - Fairchild Semiconductor

Part # FSCQ1265RT
Description  Green Mode Fairchild Power Switch (FPS) for Quasi-Resonant Switching Converter
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FSCQ1265RT Datasheet(HTML) 2 Page - Fairchild Semiconductor

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FSCQ1565RP
2
Internal Block Diagram
Figure 2. Functional Block Diagram of FSCQ1565RP
9V/15V
3
1
2
4
Auxiliary
Vref
Main bias
S
Q
Q
R
OSC
Vcc
Vref
I
delay
I
FB
V
SD
TSD
Vovp
Sync
Vocp
S
Q
Q
R
R
2.5R
Vcc good
Vcc
Drain
FB
GND
AOCP
Gate
driver
Vcc
good
LEB
600ns
PWM
Soft start
Internal
bias
Normal
operation
V
Burst
Vref
I
B
Vref
I
BFB
Burst mode
Controller
Normal
operation
Burst
Switching
5
Sync
Threshold
Quasi-resonant
(QR) switching
controller
+
-
+
-
S
Q
Q
R
Power off Reset
4.6V/2.6V : Normal QR
3.0V/1.8V : Extended QR
fs


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