SG1846中文资料PWM Controller, Current Mode PWM, Dual Sink/SourceOutputs, 8-40V -55°C to 125°C数据手册Microchip规格书

描述 Description

The SG1846 family of control ICs provides the required features to implement Fixed Frequency, Current mode control schemes while maintaining a minimum external parts count. The advanced performance of this technique can be measured in improved 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 suppression, dead-time adjust capability, and a ±1% trimmed bandgap reference.Microchip Ordering Part  Standard Microcircuit Drawing (SMD) SG1846F-DESC Cross Reference 5962-8680601FASG1846F-DESC Cross Reference 5962-8680601FXSG1846J-DESC Cross Reference 5962-8680601EASG1846J-DESC Cross Reference 5962-8680601EX

特性 Features

Automatic Feed-forward Compensation
Programmable Pulse by Pulse Current Limiting
Automatic Symmetry Correction in Push-pull Configuration
Enhanced Load Response Characteristics
Parallel Operation Capability for Modular Power Systems
Differential Current Sense Amplifier with Wide Common-mode Range - Double Pulse Suppression
200mA Totem-pole Outputs
± 1% Bandgap Reference
Under-voltage Lockout
Soft-start and Shutdown Capability
500kHz Operation

简介

SG1846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SG1846DC-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。