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LM5116-HT: LM5116带载启机问题

Part Number: LM5116-HT
Other Parts Discussed in Thread: LM5116

我用LM5116,做一个同步降压电路,带负载8A可以启机,带负载9A就不能启机,一直处于打嗝或者是保护状态,上管驱动大小波,是因为VCC电容不足吗?还是哪里供电问题?

  • Hi

         一般这种情况是过载保护,看一下Rsense电阻上是否noise过大导致(建议参考datasheet的layout,尽量避免noise影响),如果不是将Rsense电阻做小一点点。

          另外注意功率电感的选择,饱和电流建议适当放大一点。