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KA5x02xx-SERIES
KA5H0265RC, KA5M0265R, KA5L0265R,
KA5H02659RN/KA5M02659RN, KA5H0280R,
KA5M0280R
Fairchild Power Switch(FPS)
Features Description
Precision Fixed Operating Frequency (100/67/50kHz) The Fairchild Power Switch(FPS) product family is specially
Low Start-up Current (Typ. 100uA) designed for an off-line SMPS with minimal external
Pulse by Pulse Current Limiting components. The Fairchild Power Switch(FPS) consist of high
Over Load Protection voltage power SenseFET and current mode PWM IC. Included
Over Voltage Protection (Min. 25V) PWM controller features integrated fixed oscillator, under
Internal Thermal Shutdown Function voltage lock out, leading edge blanking, optimized gate turn-on/
Under Voltage Lockout turn-off driver, thermal shut down protection, over voltage
Internal High Voltage Sense FET protection, and temperature compensated precision current
Auto-Restart Mode sources for loop compensation and fault protection circuitry-
compared to discrete MOSFET and controller or R
CC
switching converter solution. The 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
8-DIP TO220-5L
1
1
1
1.6.7.8. Drain 1. Drain
1. GND
2. GND
2. GND
2. Drain
3. Vcc 3. Vcc
3. Vcc
4. FB 4. FB
4. FB
5. NC
5. S/S
Internal Block Diagram
VCC
DRAIN
32V
5V Internal
SFET
Vref bias
Good
logic
Soft Start
*
OSC
5V
S
uA
Q
R
FB
L.E.B
2.5R
5 A 1mA
+
1R
9V
0.1V
+
S GND
7.5V
Q
R
+ Thermal S/D
Power on reset
27V
OVER VOLTAGE S/D
* KA5H0265RC
Rev.1.0.4
2003 Fairchild Semiconductor Corporation