©2003 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev.1.0.3
Features
• Fixed Frequency
• Internal Burst Mode Contr ol ler for Stand- by Mode
• Pulse By Pulse Over Current Limiting
• Over Current Protection(Auto Restart Mode)
• Over Voltage Protection (Auto Restart Mode)
• Over Load Protection(Auto Restart Mode)
• Internal Thermal Shutdown Function(Latch Mode)
• Unde r Voltage Lo ck ou t
• Internal High Voltage Sense FET
•Soft Start
Description
The Fairchild Power Switch(FPS) product family is specially
designed for an off line SMPS with minimal external
components. The Fairchild Power Switch(FPS) consist of
high voltage power SenseFET and current mode PWM IC.
Included PWM controller features integrated fixed oscillator,
under voltage lock out, leading edge blanking, optimized gate
turn-on/turn-off driver, thermal shut down protection, over
voltage protection, and temperature compensated precision
current sources for loop compensation and fault protection
circuitry. compared to discrete MOSFET and controller or
R
CC
switching converter solution, a Fairchild Power
Switch(FPS) can reduce total component count, design size,
and weight and at the same time increase effic iency,
productivity, and system reliability. It has a basic platform
well suited for cost effective LCD monitor power supply.
TO-220F-5L
1
1. Drain 2. GND 3. VCC
4. Feedback 5. S oftStart
Internal Block Diagram
S
R
Q
S
R
QS
R
QTSD
(Tj=160 ℃)
Ifb
1
11
13
33
3
5
55
5
4
44
4
2
22
2
Vref
Rsenese
2.5R
R
Vref
Internal
Bias Vref
UVLO
Ron
Roff
PWM
OCL
Burst mode
controller
Filter
(130nsec)
Power-on
Reset
(Vcc=6.5V)
UVLO Reset
(Vcc=9V)
OLP
OVP
Vth=7.5V
Vcc
Vth=33V
Vth=2V
Vfb Offset
Idelay
Vcc
Vfb
Vth=1V
Vcc
Vth=11V/12V
OSC
Vref
Drain
V
CC
GND
SoftStart
Feedbock
FS6M12653RTC
Fairchil d Power Swi tch(FPS)