KA3511BS

智能型电压模式PWM IC Intelligent Voltage Mode PWM IC

Description

The is a fixed frequency improved performance pulse width modulation control circuit with complete housekeeping circuitry for use in the secondary side of SMPS Switched mode power supply. It contains various functions, which are precision voltage reference, over voltage protection, under voltage protection, remote on/off control, power good signal generator and etc.

Features

• Complete PWM control and house keeping circuitry

• Few external components

• Precision voltage reference trimmed to 2%

• Dual output for push-pull operation

• Each output TR for 200mA sink current

• Variable duty cycle by dead time control

• Soft start capability by using dead time control

• Double pulse suppression logic

• Over voltage protection for 3.3V / 5V / 12V

• Under voltage protection for 3.3V / 5V / 12V

• One more external input for various protection PT

• Remote on/off control function PS-ON

• Latch function controlled by remote and protection input

• Power good signal generator with hysteresis