适用于机载设备的过压保护电路  

Overvoltage Protection Circuit Suitable for Airborne Equipment

作　　者：林豪 杨雄 姚金慧 江保力[1] 王辰宣 Lin Hao;Yang Xiong;Yao Jinhui;Jiang Baoli;Wang Chenxuan

机构地区：[1]中国电子科技集团公司第五十二研究所

出　　处：《安全与电磁兼容》2024年第2期65-68,共4页Safety & EMC

摘　　要：在机载应用场合下,电子设备应满足GJB 181B-2012要求的50 V/50 ms过压浪涌。为此设计了满足28 VDC输入、输出总功率21 W的过压保护电路,且满足承受雷电残压80 V/18 A持续10μs的电压尖峰保护要求。详细介绍了电路的组成、工作过程、保护原理和器件选择方法,通过仿真和试验验证了过压保护功能,机载28 V输入、5 V/4.2 A输出的电源板过压浪涌测试效果良好,电源板保持正常输出。过压保护电路结构简单无需驱动电路、适用电压范围广、低成本、高可靠性、高国产可替代率,具有一定的经济和使用价值。In airborne applications,electronic devices should meet the 50 V/50 ms overvoltage surge requirements of GJB 181B-2012.For this purpose,an overvoltage protection circuit with a total power of 21 W for 28 VDC input has been designed,and it meets the voltage peak protection requirement of withstanding lightning residual voltage 80 V/18 A for continuous 10μs.The composition,working process,protection principle,and device selection method of the circuit are introduced in detail.The overvoltage protection function is verified through simulation and experiments.The overvoltage surge test results of the onboard 28 V input and 5 V/4.2 A output power boards are good,and the power boards maintain normal output.The overvoltage protection circuit has a simple structure without the need for a driving circuit,a wide range of applicable voltage,low cost,high reliability,and high domestic substitutability,which has certain economic and practical value.

关 键 词：GJB 181B-2012 过压保护 国产化 机载 

分 类 号：V243[航空宇航科学与技术—飞行器设计]