Fairchild Power Switch(SPS)
www.fairchildsemi.com
KA3S0765R/KA3S0765RF
Fairchild Power Switch(SPS)
Features
• • • • • • • • • Wide operatimg frequ...
Description
www.fairchildsemi.com
KA3S0765R/KA3S0765RF
Fairchild Power Switch(SPS)
Features
Wide operatimg frequency range up to (150kHz) Pulse by pulse over current limiting Over load protection Over voltage protecton (Min. 23V) Internal thermal shutdown function Under voltage lockout Internal high voltage sense FET External sync terminal Auto Restart Mode
Description
The SPS product family is specially designed for an offline SMPS with minimal external components. The SPS consist of high voltage power SenseFET and current mode PWM IC. Included control IC features a trimmed oscillator, under voltage lock-out, leading edge blanking, optimized gate turnon/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 RCC switching converter solution, a SPS can reduce total component count, design size, weight and at the same time increase & efficiency, productivity, and system reliabilit. It has a basic platform well suited for cost-effective C-TV power supply.
TO-3P-5L
TO-3PF-5L
1
1
1. DRAIN 2. GND 3. Vcc 4. FB 5. Sync
Internal Block Diagram
#3 VCC 32V 5V Vref − 5V + 6.4V #4 FB − 1mA 2.5R 1R 9V + 7.5V − + 25V − Thermal S/D OVER VOLTAGE S/D + 0.1V S R Q #2 GND OSC S R 2µA L.E.B Q Good logic Internal bias #1 DRAIN SFET
#5 Sync
Power on reset
Rev.1.0.1
©2001 Fairchild Semiconductor Corporation
KA3S0765R/KA...
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