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FS8S0765RCB
Fairchild Power Switch(FPS)
Features
Description
• Burst Mode Operation to Reduce the Power Consumption
in the Standby Mode
• External pin for Synchronization and Soft Start
• Wide Operating Frequency Range up to 150kHz
• Low Start-up Current (Max:80uA)
FS8S0765RCB is a Fairchild Power Switch (FPS) that is
specially designed for off-line SMPS of CRT monitor with
minimal external components. This device is a current mode
PWM controller combined with a high voltage power
SenseFET in a single package. The PWM controller features
integrated oscillator to be synchronized with the external
sync signal, under voltage lockout, optimized gate driver and
temperature compensated precise current sources for the
loop compensation. This device also includes various fault
protection circuits such as over voltage protection, over load
protection, abnormal over current protection and over tem-
perature protection. Compared with discrete MOSFET and
PWM controller solution, FPS can reduce total cost, compo-
nent count, size and weight simultaneously increasing effi-
ciency, productivity and system reliability. This device is well
suited for the cost effective monitor power supply.
• Low Operating Current (Max:15mA)
• Pulse by Pulse Current Limiting
• Over Voltage Protection (Auto Restart Mode)
• Over Load Protection (Auto Restart Mode)
• Abnormal Over Current Protection (Auto Restart Mode)
• Internal Thermal Shutdown (Auto Restart Mode)
• Under Voltage Lockout
• Internal High Voltage SenseFET
Application
• Monitor SMPS
TO-220-5L
1
1. Drain 2. GND 3. V
4. Feedback 5. Sync
CC
Internal Block Diagram
Vcc
3
Drain
1
Vref
Vcc good
Vref
Burst Mode Detector
5
Soft start
& Sync
Vfb<0.8V
Vss>3V
Burst Mode
Controller
9V/15V
OSC
No sync
Internal
Bias
Vref
Sync
Detector
Vcc
Vref
S
Q
Q
Idelay
IFB
PWM
Gate
driver
R
FB
4
2.5R
R
LEB
VSD
Vcc
S
Q
Q
Vovp
TSD
2
GND
UVLO Reset
(Vcc<9V)
R
AOCP
Vocl
Rev.1.0.1
©2003 Fairchild Semiconductor Corporation