我在工作中用了TPS54616和TPS54610,是5V输入,设计成3.3/2.5V输出,输出电流为5A,在测试时发现芯片不工作,SS/ENA管脚电平只有0.6V,BOOT管脚电平为3.6V,是什么原因呢?
我的RT管脚漏接了电阻,现在是悬空,与这个有关系吗?
多谢!
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ss/ena 脚电平0.6v, 芯片处于关断状态. 建议用示波器看一下输入电压,SS/ENA 电压波形,可以用输入电压上升沿触发.