介绍了开关电源的基础知识, DC-DC 变换器的3 种基本电路: 降压电路、升压电路和极性反转电路的结

构和工作原理。设计了以通用DC-DC 变换器控制芯片MC34063A 及其外围电路为基础的小功率DC-DC 变换

器的实验装置。提出了实验中应该注意和研究的问题。对于学生认识和应用DC-DC 变换器有很大的帮助-Introduces the basics of the switching power supply, three kinds of DC-DC converter circuit: the circuit of buck, boost circuit and polarity reversal circuit node

Structure and working principle. Designed Universal DC-DC converter control chip MC34063A and its peripheral circuit based low-power DC-DC transform

Experimental setup of the device. Should be noted that experiments and research issues. A great help for the students　understanding and application of DC-DC converter