摘要
主要论述了基于AT89S52单片机的一种开关电源的设计原理及实现方法,采用开关电压调压芯片LM2596作为主控单元,主控制器通过控制程控电阻模块,实现并联供电系统输出电流的自动调节分配。同时芯片连接电流传感电路与过流保护电路,对输出电流实时检测,并反馈给主控器,实现过流保护。供电系统输出稳定的直流电压,并且供电效率达到60%以上,设计的产品可应用于通信设备和电子产品中,实用性较高。
The article mainly discusses one kind of switching power supply principle of design and the realization method based on AT89S52 monolithic integrated circuit,the switch voltage accent to press chip LM2596 was used as the master control unit. The main controller through control of programmable resistance module to realize the automatic control assignment of parallel power supply system output current. At the same time chip is connected with the current sensing circuit and over-current protection circuit, the output current real-time detection, and feedback to the controller,achieve over-current protection. Stable DC voltage was output by power supply system, and the power supply efficiency achieved above 60% ,the design product which has a strong practical could be applied to the communication equipment and the electronic product.
出处
《电子测量技术》
2012年第10期77-79,87,共4页
Electronic Measurement Technology
