中文摘要：

在分析已有电源模块均流技术优缺点的基础上，提出了一种Buck型DC—DC转换器的并联供电方案。采用电流模PWM控制器EUP8207为主控芯片，通过电压反馈放大器输出端并联。消除了电压环路失调电压的影响；通过在电流采样路径增加可调电阻的方法，消除了电流环路失调跨导的影响。另外，为提高电源转换效率。采用了导通电阻等于15mΩ的P型MOSFETSi4401和低压降的肖特基二极管SSC53L作为功率器件，以及10mΩ．的电感电流采样电阻。本设计方案具有均流比例可调、转换效率高、应用电路简洁、低成本等突出优点。

英文摘要：

Based on the analysis of advantages and disadvantages of the available power modules, a new paralleled method for Buck DC-DC converters was proposed. The proposed design adopted the current-mode PWM controller EUP8207 as the main-control chip, and the offset voltage caused by the voltage loop was eliminated by the voltage feedback amplifier output terminals in parallel. An adjustable resistor was connected to the current sampling path to eliminate the impact of offset transconductance. In addition, in order to improve the power conversion efficiency, a 15 mΩ. P-type MOSFET Si4401, and a low voltage drop Schottky diode SCC53L, and a 10 mΩ inductor-current sampling resistor were used as power devices. The proposed design has advantages of adjustable proportion of current sharing, high conversion efficiency, simple application circuit, the low cost and so on.