12V输入电压调整模块的现状与分析

The Analysis of Voltage Regulator Module with 12V Input Voltage

在非隔离开关电源电路中,随着输出电压的不断降低,BUCK电路占空比很小,已难以适合未来低电压大电流时电压调整模块(VRM)的需求。为了提高电路占空比,多种电路拓扑相继面世。与此同时,为了改善电路瞬态响应,优化、改进了原有控制方式。本文总结和分析近年来12V输入电压调整模块拓扑及控制方法。

With the sharp drop of the output voltage, the duty ratio is much smaller in the conventional buck topology which can't meet the stringent requirement of low voltage and large current in the application of the voltage regulator module (VRM). There are several topologies presented to improve the duty ratio in the recent years. Meanwhile, variant control strategies have been improved and optimized to satisfy the requirements. This paper sets forth and analyzes the new topologies and control methods presented in the recent years.