基于555集成电路的DC/DC变换器输出短路保护电路  

Output Short Circuit Protection Circuit of DC/DC Converter Based on 555 Integrated Circuit

作　　者：展栋 ZHAN Dong(Shaanxi Huajing Micro-Electronic Co.,Ltd.,Xi'an 710065,China)

机构地区：[1]陕西华经微电子股份有限公司,陕西西安710065

出　　处：《通信电源技术》2023年第2期4-6,共3页Telecom Power Technology

摘　　要：针对某些DC/DC变换器中脉宽调制电路在输出短路时,输入端电流大不易调试的问题,利用555集成电路的充、放电时自身特性,结合脉宽调制器实现了DC/DC变换器短路时较小的输出短路功耗。介绍了基于555集成电路的DC/DC变换器输出短路保护电路的设计机理,并通过实验验证此短路保护电路的功耗从10 W降低至1 W以下,同时也给出了使用注意事项。For certain DC/DC converter midrib width modulation circuit in the output short circuit,the input current is big not easy to debug,using 555 integrated circuit of charging and discharging their own characteristics,combined with the pulse width modulator to achieve the DC/DC converter are shorted smaller output short circuit power consumption.This paper introduces the mechanism of based on the 555 integrated circuit of the DC/DC converter output short circuit protection circuit,and through the experiment to make short circuit from 10 W power consumption reduced to less than 1 W,also use matters needing attention are given.

关 键 词：DC/DC变换器 555集成电路 输出短路功耗 脉冲宽度调制(PWM) 

分 类 号：TM46[电气工程—电器] TM911.4