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Fairchild Power Switch(FPS)
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 a
high voltage power SenseFET and a current mode PWM IC.
Included PWM controller features integrated fixed oscillator,
the under voltage lock out, the leading edge blanking, the
optimized gate turn-on/turn-off driver, the thermal shutdown
protection, the over voltage protection, and the temperature
compensated precision current sources for the loop
compensation and a fault protection circuitry. compared with
a discrete MOSFET and a controller or a RCC switching
converter solution, a Fairchild Power Switch(FPS) can
reduce total component count, design size, and weight and at
the same time increase efficiency, productivity, and system
reliability. It has a basic platform well suited for the cost
effective LCD monitor power supply.
TO-220F-5L
Fixed Frequency
Internal Burst Mode Controller 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)
Under Voltage Lockout
Internal High Voltage Sense FET
Soft Start
Application
鈥?LCD Monitor SMPS
鈥?Adaptor
1
1. Drain 2. GND 3. V
CC
4. Feedback 5. SoftStart
Internal Block Diagram
V
CC
Drain
3
Vref
OSC
Vref
Vfb
Vth=1V
Burst mode
controller
1
SoftStart
5
Internal
Bias
Vref
UVLO
S
Q
Ron
Vcc
Vth=11V/12V
R
Roff
PWM
Feedbock
4
Ifb
2.5R
R
Vcc
Vfb Offset
Rsenese
Vref
Idelay
OLP
Vth=7.5V
Vcc
Vth=33V
OVP
OCL
Filter
(130nsec)
Vth=2V
2
GND
S
UVLO Reset
(Vcc=9V)
Q
Q
S
R
Power-on
Reset
(Vcc=6.5V)
TSD
(Tj=160
鈩?
R
Rev.1.0.4
漏2003 Fairchild Semiconductor Corporation