基于LM5117降压型开关电源的设计  

Design of LM5117 Step-Down Switching Power Supply

作　　者：黄勇[1] 徐邦贤 潘宇[1] HUANG Yong;XU Bang-xian;PAN Yu(Bowen School of Management,Guilin University of Technology,Guilin Guangxi 541006)

机构地区：[1]桂林理工大学博文管理学院,广西桂林541006

出　　处：《数字技术与应用》2018年第5期170-171,173,共3页Digital Technology & Application

基　　金：2017年度广西高等教育本科教学改革工程项目;项目编号:2017JGA388

摘　　要：降压型直流开关稳压电源由于具有功耗小、效率高、输出稳定电压范围宽等优点,在当今电子设备中充当着重要角色。本系统设计采用采用降压(Buck)型拓扑结构,选用PWM芯片LM5117,配以必要的外围元件,控制功率开关管CSD18532KCS,实现电压的稳定输出。其具有较好的负载调整率和电压调整率,带负载能力强,大电流下纹波电压小,电路可靠,转换效率高等特点。Step-down DC switching regulated power supplies play an important role in today＇s electronic devices due to their advantages of low power consumption, high efficiency, and a wide range of output voltage stability. This system design adopts the Buck type topology structure, selects the PWM chip LM5117, equips with the necessary peripheral components, controls the power switch tube CSD18532 KCS, realizes the voltage steady output. It has good load regulation rate and voltage regulation rate, strong load capacity, low ripple voltage under large current, reliable circuit and high conversion efficiency.

关 键 词：开关电源 PWM LM5117 CSD18532KCS 

分 类 号：TN86[电子电信—信息与通信工程]