来源:
《安全与电磁兼容》2011年第5期
作者:金健
开关电源端口浪涌抗扰度抑制措施
Modification on the Terminator of SMPS for Surge Immunity Test
摘要 针对某开关电源浪涌(冲击)抗扰度试验的失败案例,结合安规要求进行分析,提出了保护电源端口的整改方案,并详细介绍了如何正确选择压敏电阻(MOV)及负温度系数(NTC)热敏电阻。 整改后,该产品的浪涌抗扰度测试结果符合标准要求。
关键词 浪涌抗扰度; 开关电源; 整改
Abstract According to the failure case of switching mode power supply (SMPS) on surge
immunity test,the modification case on its terminator is put forward combining with the
analysis of safety requirements. How to select metal oxide varistors(MOV)and negative
temperature coefficient (NTC) thermistors is analyzed as well. Finally, surge immunity
test for the SMPS is passed according to the standard after modification.
Keywords surge immunity; switching mode power supply; modification