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KA1M0565R/KA1H0565R
Fairchild Power Switch(FPS)
Features Description
Precision fixed operating frequency The Fairchild Power Switch(FPS) product family is specially
KA1M0565R (67KHz),KA1H0565R (100KHz) designed for an off-line SMPS with minimal external
Pulse by pulse over current limiting components. The Fairchild Power Switch(FPS) consist of
Over load protection high voltage power SenseFET and current mode PWM
controller IC. PWM controller features integrated fixed
Over voltage protection (Min. 23V)
oscillator, under voltage lock out, leading edge blanking,
Internal thermal shutdown function
Under voltage lockout optimized gate turn-on/turn-off driver, thermal shut down
protection, over voltage protection, temperature compensated
Internal high voltage sense FET
precision current sources for loop compensation and fault
Auto restart
protection circuit. compared to discrete MOSFET and
controller or R switching converter solution, a Fairchild
CC
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 4. FB
CC
Internal Block Diagram
#3 VCC
#2 DRAIN
32V
5V Internal
SFET
Vref bias
Good
logic
OSC
9V
S
Q
5 A
1mA
R
#4 FB
L.E.B
2.5R
+
1R
0.1V
+
S #1 GND
7.5V
Q
R
+ Thermal S/D
Power on reset
25V
OVER VOLTAGE S/D
Rev.1.0.2
2001 Fairchild Semiconductor Corporation