连续导电模式下的单电感多输出DC—DC变换器

本文系统地分析了采用分时复用原理的单电感多输出DC—DC变换器的结构。由于电感共享，各输出支路之间存在着严重的交叉影响，当所有输出支路严格地工作在不连续导电模式（DCM）或伪连续导电模式（PCCM）下时，可有效地抑制这种交叉影响。文中采用一种新的控制方式，利用各支路输出电压的共模电压、差模电压来分别控制输入半桥和输出半桥的占空比，在连续导电模式（CCM）下实现了几乎没有交叉影响的多路输出。

Single-Inductor Multiple-Output DC-DC Converters in Continuous Electric Conduction Mode

The structure of single-inductor muhiple-output （SIMO） DC-DC converter implemented by time sharing multiplexing （TSM）principle is systematically analyzed in this paper. There is a serious cross impact between each output spur tracks due to sharing one inductor,but this sort of cross impact can be effectively restrained while all of the output spur tracks works in discontinuous electric conduction mode （DCM） or pseudo continuous electric conduction mode （PCCM） strictly. This paper adopts a new control method that the duty ratios of the input half-bridge and output half-bridge are controlled by the common-mode voltage and the differential-mode voltage of each spur tracks＇s output voltages respectively, which enables the SIMO DC-DC converter to implement the multiplexed outputs hardly any cross influence in continuous conduction mode （CCM）.