FS8S0765RCB Datasheet, PDF (1/20 Pages) Fairchild Semiconductor – Fairchild Power Switch(FPS)

FS8S0765RCB
Fairchild Power Switch(FPS)
www.fairchildsemi.com
Features
• 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)
• 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
Description
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.
TO-220-5L
1
1. Drain 2. GND 3. VCC 4. Feedback 5. Sync
Internal Block Diagram
Vcc
3
Vref
Soft start ⁵
& Sync
Burst Mode Detector
Vfb<0.8V
Vss>3V
No sync
Burst Mode
Controller
Sync
Detector
Vref
9V/15V
OSC
Vcc good
Vref
Drain
1
Internal
Bias
FB 4
Vcc
I_delay
V_SD
Vcc
Vovp
TSD
Vref
I_FB
2.5R
R
PWM
SQ
RQ
LEB
Gate
driver
UVLO Reset
(Vcc<9V)
SQ
RQ
AOCP
Vocl
2 GND
©2003 Fairchild Semiconductor Corporation
Rev.1.0.1