现代电子技术2015，Vol.38Issue(22)：139-141,146,4.DOI:10.16652/j.issn.1004-373x.2015.22.040
基于MCU控制的开关电源稳压电路设计
Design for voltage regulator circuit of switching power supply based on MCU control
李淑红 1邢军1
作者信息
- 1. 河南省电子产品质量监督检验所,河南 郑州 450005
- 折叠
摘要
Abstract
A voltage regulator circuit of the switching power supply based on MCU control was designed,which is com-posed of rectification filtering circuit,push-pull power conversion circuit and control circuit. In this circuit,the output voltage of the switching power supply is controlled by regulating PWM via the MCU. The digital signal output by MCU is converted into analog signal through the DAC0832. The analog signal is taken as the reference voltage of the second pin of the switching con-trol chip SG3525. SG3525 generates PWM control pulse automatically according to the variation of reference voltage to regulate the output pulse width of the switching tube,so the purpose of regulating the output voltage is achieved. The experimental re-sults show that the output voltage adjustable range is 28~36 V,the maximum output current is 15 A,and the efficiency of the switching power supply is 89%.关键词
开关电源/MCU/SG3525/稳压电路Key words
switching power supply/MCU/SG3525/voltage regulator circuit分类
信息技术与安全科学引用本文复制引用
李淑红,邢军..基于MCU控制的开关电源稳压电路设计[J].现代电子技术,2015,38(22):139-141,146,4.
