使用tps54325时,input DC12V output 5V, 正常使用时输出正常5V,然后短路5V端,输出为0v,然后移除短路输出任然为0V,请教原因。。谢谢
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Hi
输出短路除了触发过载保护,还会触发输出欠压保护,过载保护是Auto-recovery, 但是欠压保护是latch的。
When the feedback voltage becomes lower than 70% of the target voltage, the UVP comparator output goes high and an internal UVP delay counter begins. After 250 μs, the device latches off both internal top and bottom MOSFET. This function is enabled approximately 1.7 x soft-start time.
意思是这个芯片就是这么设计的?短路了我这边除了重启没有其他办法恢复?还有就是能否通过硬件电路设计去掉这个功能