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tps54331漏电问题

Other Parts Discussed in Thread: TPS54331

项目中用到tps54331芯片,将24v转为5v,电流2安培,5v有超级电容储能。当24v断电时系统还可以工作几秒钟。测试发现24v断电时tps54331芯片会漏电,大约几十毫安。考虑加二极管防止漏电。 方法一:在电感输出端串二极管,缺点二极管电流要求大。 方法二:在tps54331输出端和电感之间串二极管,二极管电流比方法一小,但是不知道会不会有隐患。 希望高手指点一下! 谢谢!