www.fairchildsemi.com
KA1L0365R/KA1M0365R/KA1H0365R
Fairchild Power Switch(FPS)
Features
• Precision Fixed Operating Frequency
• KA1L0365R(50kHz), KA1M0365R(67kHz),
KA1H0365R(100kHz)
• Pulse by Pulse Over Current Limiting
• Over Load Protection
• Over Voltage Protection (Min. 23V)
• Internal Thermal Shutdown Function
• Under Voltage Lockout
• Internal High Voltage Sense FET
• Auto Restart
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
controller IC. 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, temperature compensated
precision current sources for loop compensation and fault
protection circuit. compared to discrete MOSFET and
controller or R
CC
switching converter solution, a Fairchild
Power Switch(FPS) can reduce total component count,
design size, weight and at the same time increase &
efficiency, productivity, and system reliability. It has a basic
platform well suited for cost effective design in either a
flyback converter or a forward converter.
TO-220F-4L
1
1. GND 2. DRAIN 3. V
CC
4. FB
Internal Block Diagram
#3 V
CC
32V
5V
Vref
Good
logic
OSC
9V
5µA
#4 FB
2.5R
1R
+
7.5V
−
+
25V
−
Thermal S/D
OVER VOLTAGE S/D
1mA
−
+
S
R
L.E.B
0.1V
S
R
Q
#1 GND
Q
Internal
bias
#2 DRAIN
SFET
Power on reset
Rev.1.0.2
©2003 Fairchild Semiconductor Corporation
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
