基于原边反馈的反激式AC-DC开关电源芯片研究  

作　　者：吴启琴 沈克强 赵俊霞[1] 孙小羊[1] 孟永益 

机构地区：[1]三江学院,南京210012 [2]中国大唐集团,南京210046

出　　处：《科技创新与应用》2023年第7期15-20,共6页Technology Innovation and Application

基　　金：国家自然基金面上项目(61674097);教育部高等学校电工电子基础课程(E2134);江苏省“十四五”重点学科建设项目(241);三江学院科研项目(2018SJKY027);三江学院2022年度教学建设与改革项目-项目化课程建设(J22022)。

摘　　要：现今时代是信息化的时代,信息技术的迅猛发展使得人们对于电子产品的依赖性越来越大,这些产品都离不开电源,其性能对电子产品的各项指标是否正常起关键性作用。开关电源是常用的直流稳压电源,芯片中的关键部件都处于高频开关的条件下,自身所需的能耗较少,工作效率可高达80%~90%。该文是采用CSMC0.5μm工艺,基于Cadence平台,设计的一款反激式AC-DC开关电源芯片系统,其输入交流电压范围为85~265 V。此芯片采用原边反馈技术,省去了光耦器件的使用,对整体电路进行简化,从而缩小体积且降低成本;运用PWM/PFM(Pulse Width Modulation/Pulse Frequency Modulation)调制方式,提高了系统的工作效率。最后,通过实验验证此开关电源芯片的可靠性,该芯片可恒流稳定输出达1 A;恒压稳定输出达5 V。When we come to the Information Age,people are becoming more and more dependent on electronic products with the rapid development of information technology.They are inseparable from the power supply,for that electronic products can achieve the standards are dependence on their functions.Switching power supply is a commonly used DC power supply which has a stable voltage.If the key components in the chip are working in the high frequency switching state,it consumes lower energy and its work efficiency can be up to 80%even 90%.In this paper,a flyback AC-DC switching power supply chip system is designed based on CSMC0.5μm technology and Cadence platform.Its input AC voltage range is 85~265 V.The chip adopts the original feedback technology,which eliminates the use of Optocouplers and simplifies the overall circuit,thus reducing the volume and cost;using PWM/PFM(Pulse Width Modulation/Pulse Frequency Modulation)modulation mode to improve the efficiency of the system.Finally,the reliability of the switching power supply chip is verified by experiments.the chip can achieve constant current stable output up to 1A and constant voltage stable output up to 5 V.

关 键 词：CSMC 0.5μm工艺 开关电源 原边反馈 PWM/PFM调制 电压 

分 类 号：TM46[电气工程—电器]