KA3844B SMPS Controller

RS Components part # 671-0270

Manufactured by Fairchild Semiconductor - DIP8 Package

Description

The KA3844B is a fixed frequency current-mode PWM controller. They are specially designed for Off - Line and DC-to-DC converter applications with minimum external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator and a high current totempole output for driving a power MOSFET. The KA3844B has UVLO thresholds of 16V (on) and 10V (off). The KA3844B can operate with 50% duty cycle.

Features

• Low Start up Current
• Maximum Duty Clamp
• UVLO With Hysteresis
• Operating Frequency up to 500KHz