LM5069用于系统总开关的疑问

Hi
以下是datasheet关于输出短路时的描述：
If the load current increases rapidly (for example, the load is short-circuited) the current in the sense resistor (RS)
may exceed the current limit threshold before the current limit control loop is able to respond. If the current
exceeds twice the current limit threshold (105 mV/RS), Q1 is quickly switched off by the 230-mA pulldown current
at the GATE pin, and a fault timeout period begins. When the voltage across RS falls below 105 mV the 230-mA
pulldown current at the GATE pin is switched off, and the gate voltage of Q1 is then determined by the current
limit or the power limit functions. If the TIMER pin reaches 4 V before the current limiting or power limiting
condition ceases, Q1 is switched off by the 2-mA pulldown current at the GATE pin as described in Fault Timer
and Restart
如果烧MOS，不是因为输入过压（没有额外增加大功率TVS管）， 能够改善的也只有将MOS电流选大一点，因为你这个已经超出正常使用，是在不正常的短路条件下。 而输入过载，可调的空间应该不大（如果12A下正常，过载点你可以确认一下，看能否再缩小点）。