描述 Description

The Power Switch product family is specially designed for

an off-line SMPS with minimal external components. The

Power Switchconsist of highvoltage power SenseFET and

current mode PWM IC. IncludedPWM controller features

integrated fixed oscillator, under voltage lock out, leading edge

blanking, optimized gate turn-on/turn-off driver, thermal shut

down protection, over voltage protection, and temperature

compensated precision current sources for loop

compensation and fault protection circuitry-compared to

discrete MOSFET and controller or RCC switching converter

solution. The Power Switchcan reduce total component count,

design size, weight and at thesame time increase efficiency,

productivity, and system reliability. It has a basic platform

well suited for cost-effectivedesign in either a flyback

converter or a forward converter.

特性 Features

? Precision Fixed Operating Frequency (100/67/50kHz)

? Low Start-up Current (Typ. 100uA)

? Pulse by Pulse Current Limiting

? Over Load Protection

? Over Voltage Protection (Min. 25V)

? Internal Thermal Shutdown Function

? Under Voltage Lockout

? Internal High Voltage Sense FET

? Auto-Restart Mode