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TLV62085 issue

Other Parts Discussed in Thread: TLV62085

我们这边在用TLV62085设计的手电筒,出现点问题, 当电压输入6V时就出现就是由中亮转高亮的时候,高亮变低了,但如果直接上电高亮就没问题;同时将输入电压改为4V也是没问题,帮忙看下是什么问题跟如何解决办法;(亮度是用PWM控制整个电路的通断来做高)