CS51221中文資料用于正向和反激的增強(qiáng)電壓模式 PWM 控制器數(shù)據(jù)手冊O(shè)NSEMI規(guī)格書

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

應(yīng)用 Application

? Hot Swap - DC-DC Conversion

簡介

CS51221屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關(guān)式控制器。由ONSEMI制造生產(chǎn)的CS51221DC-DC 開關(guān)控制器PMIC（電源管理集成電路）DC 到 DC 開關(guān)式控制器是用于高效率電路的穩(wěn)壓 IC，其配置為生成高于（突升或步升）或低于（突降或步降）輸入電源的輸出電源電壓。其他拓?fù)浣Y(jié)構(gòu)可能包括：降壓-升壓、反激、正激、Cuk、SEPIC、全橋、半橋和推挽式。這些器件不同于需要最小電壓并“燒盡”多余電壓的線性穩(wěn)壓器。