FAIRCHILD KA5x02xx-SERIES KA5H0265RC, KA5M0265R, KA5L0265R, KA5H02659RN KA5M02659RN, KA5H0280R, KA5M0280R
Summary
Optimize your power supply design with this advanced high-power switching component, ideal for SMPS applications like flyback or forward converters. This device integrates crucial functionalities—including over/under voltage protection, thermal shutdown, and low start-up current—reducing component count and boosting efficiency compared to discrete solutions. The documentation provides comprehensive technical details covering absolute maximum ratings, detailed electrical characteristics, and fixed operating frequencies (50/67/100kHz). Essential for electronics engineers requiring reliable, cost-effective power management components.
Page 1 Text Content
www.fairchildsemi.com
KA5x02xx-SERIES KA5H0265RC, KA5M0265R, KA5L0265R, KA5H02659RN/KA5M02659RN, KA5H0280R, KA5M0280R Fairchild Power Switch(FPS) Features Description Precision Fixed Operating Frequency (100/67/50k Hz) The Fairchild Power Switch(FPS) product family is specially Low Start-up Current (Typ. 100u A) 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 Sense FET 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 RCC 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
1.6.7.8. 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
32V DRAIN
5V Internal
Vref bias SFET
Good logic
Soft Start
7.5V GND
Thermal S/D
Power on reset
OVER VOLTAGE S/D
* KA5H0265RC
Rev.1.0.4
©2003 Fairchild Semiconductor Corporation
Page Summary Contents For FAIRCHILD KA5x02xx-SERIES KA5H0265RC, KA5M0265R, KA5L0265R, KA5H02659RN KA5M02659RN, KA5H0280R, KA5M0280R
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 14 |
| File Size | 138.68 KB |
| Published | June 20, 2026 |
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Frequently Asked Questions
What is the maximum ambient operating temperature?
The maximum operating ambient temperature is -25 to +85 °C.
How low is the start-up current for this device?
It has a low typical start-up current of 100uA.
Is this switcher suitable for various power applications?
Yes, it is suited for cost-effective design in either a flyback converter or a forward converter.
What protection features does the FPS include?
It includes over load, over voltage (min. 25V), under voltage, internal thermal shutdown, and other protections.