Description

The CS51021/22/23/24 Fixed Frequency PWM Current Mode Controller family provides all necessary features required for AC-DC or DC-DC primary side control.

Features

■ 75µA Max. Startup Current

■ Fixed Frequency Current Mode Control

■ 1MHz Switching Frequency

■ Undervoltage Protection Monitor

■ Overvoltage Protection Monitor with Programmable Hysteresis

■ Programmable Dual Threshold Overcurrent Protection with Delayed Restart

■ Programmable Soft Start

■ Accurate Maximum Duty Cycle Limit

■ Programmable Slope Compensation

■ Leading Edge Current Sense Blanking

■ 1A Sink/Source Gate Drive

■ Bidirectional Synchronization (CS51021/23)

■ 50ns PWM Propagation Delay

■ 100µA Max Sleep Current (CS51022/24)