CS51221中文资料用于正向和反激的增强电压模式 PWM 控制器数据手册ONSEMI规格书

描述 Description

The CS51221 Enhanced Voltage Mode PWM Controller contains all of the features necessary for basic voltage mode operation. This PWM controller has been optimized for high frequency primary side control operation. In addition, this device includes such features as: Soft Start, accurate duty cycle limit control, less than 50uA startup current, over and under voltage protection and bidirectional synchronization. The CS51221 is available in a SOIC-16 and TSSOP-16 surface mount packages.

特性 Features

• 1MHz Frequency Capability
• Fixed Frequency Voltage Mode Operation, with Feed Forward
• Thermal Shutdown
• Under Voltage Lock-out
• Accurate Programmable Max Duty Cycle Limit
• 1A Sink/Source Gate Drive
• Programmable Pulse-by-Pulse Overcurrent Protection
• Leading Edge Current Sense Blanking
• 75ns Shutdown Propagation Delay
• Programmable Soft Start
• Undervoltage Protection
• Overvoltage Protection with Programmable Hysteresis
• Bi-directional Synchronization
• 25ns GATE Rise and Fall Time (1nF load)
• 3.3V 3% Reference Voltage Output
• Pb-Free Package is Available

应用 Application

• Hot Swap - DC-DC Conversion

简介

CS51221属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由ONSEMI制造生产的CS51221DC-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。