www.fairchildsemi.com
KA2S0680B
Fairchild Power Switch(SPS)
Features
• Wide operating frequency range up to 150KHz • P...
www.fairchildsemi.com
KA2S0680B
Fairchild Power Switch(SPS)
Features
Wide operating frequency range up to 150KHz Pulse by pulse over current limiting Over load protection Over
voltage protection (Min. 23V) www.DataSheet4U.com Internal thermal shutdown function Under
voltage lockout Internal high
voltage sense FET External sync terminal Latch up Mode
Description
The SPS product family is specially designed for an off-line SMPS with minimal external components. The SPS consist of high
voltage power SenseFET and current mode PWM Controller IC. PWM controller features integrated fixed oscillator, under
voltage lockout, 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 RCC switching converter solution, a SPS 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 monitor power supply.
TO-3P-5L
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 + OSC S R 2µA L.E.B 0.1V S R Q #2 GND Q Good logic Internal bias #1 DRAIN SFET
#5 Sync
Power on reset
Rev.1.0.1
©2001 Fairchild Semiconductor Corporation...