SG3846DW中文资料Flyback, Forward and Isolated数据手册Microchip规格书

描述 Description

Key Features:
• Automatic feed forward compensation
• Programmable pulse by pulse current limiting
• Automatic symmetry correction in push-pullconfiguration
• Enhanced load response characteristics
• Parallel operation capability for modular powersystems
• Differential current sense amplifier with widecommon mode range
• Double pulse suppression
• 200mA totem-pole outputs
• ± 1% bandgap reference
• Under-voltage lockout
• Soft-start capability
• Shutdown capability
• 500KHz operationThe SG1846 family of control ICs provides all of the necessary features to implement fixed frequency, current mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in im-proved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel “power modules” while maintaining equal current sharing.Protection circuitry includes built-in under-voltage lockout and programmable current limit in addition to soft start capability. A shutdown function is also available which can initiate either a complete shutdown with automatic restart or latch the supply off.Other features include fully latched operation, double pulse sup-pression, deadtime adjust capability, and a ±1% trimmed bandgap reference.

简介

SG3846DW属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由制造生产的SG3846DWDC-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。