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lm2587加负载时,输出电压下降。

Other Parts Discussed in Thread: LM2587

我用桥式整流将20到30V的交流电整流,然后阻容滤波,加到DC-DC lm2587模块,输出固定36V,加负载就电压下降,怎么办。

  • 输出电压下跌,建议你检查一下输入源能够提供的电流是否足够,Dc-Dc模块的设计是否支持当前的负载,比如电感是否太大,对于开关模式的Dc-Dc转换器,电感与输出电流能力是成反比的,电感一般满足CCm的基础上略有余量即可,不能太大于计算值。