基于DM0265的多路输出开关电源设计

Design of multi-output switching power supply based on DM0265

开关电源设计是变频器硬件设计的核心内容之一,其性能的好坏直接影响变频调速系统的整体工作性能。针对变频器内部电路多种电压等级供电的需要,设计了一种基于Fairchild公司的DM0265芯片的反激式多路输出隔离型开关电源。介绍了该电源的工作原理、电路组成,重点阐述了变压器的设计。该电源具有宽的输入电压范围,稳定的4路直流输出,并且芯片外围电路简单,工作稳定。实验结果表明:该开关电源性能优良,能为变频器长期、稳定地供电。

Switching power supply plays a very important part in inverter equipment,because its capability directly affects the entire performance of variable frequency speed-governing system.Aiming at the requirement of multiple voltage level in the inverter,a multi-output isolated switching power supply was designed.The working principle and circuit of the power supply were detailed,and the design of transformer was emphasized.This switching power supply based on DM0265 made by Fairchild Semiconductor has the characteristics of wide input voltage range,a stable 4-way outputs and simple peripheral circuit.Experiment results show that the power supply has good performance,and it can energize the inverter steadily.