The CS51021A/2A/3A/4A Fixed Frequency PWM Current Mode Controller family provides all necessary features required for AC−DC or DC−DC primary side control. Several features are included eliminating the additional components needed to implement them externally. In addition to low startup current (75 A) and high frequency operation capability, the CS51021A/2A/3A/4A family includes overvoltage and undervoltage monitoring, externally programmable dual threshold overcurrent protection, current sense leading edge blanking, current slope compensation, accurate duty cycle control and an externally available 5.0 V reference.

Features

• 75 A Max. Startup Current

• Fixed Frequency Current Mode Control

• 1.0 MHz 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

• 1.0 A Sink/Source Gate Drive

• Bidirectional Synchronization (CS51021A/3A)

• 50 ns PWM Propagation Delay

• 100 A Max Sleep Current (CS51022A/4A)

• Pb−Free Packages are Available*

CS51021AEDR16属于集成电路（IC） > PMIC - 稳压器 - DC DC 开关式控制器。安森美半导体公司制造生产的CS51021AEDR16DC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。