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)