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LM5007使用问题

Other Parts Discussed in Thread: LM5007

        按照datasheet参考电路搭的LM5007 30V转12V电路给6个栅极驱动器供电,栅极驱动器未工作时,电路板工作正常,栅极驱动器收到PWM波信号,LM5007突然不工作。输入电源电压波形在关断前瞬间会出现拉低,估计是LM5007进入欠压保护,所以关断。

        以前使用一颗800mA的电源芯片给同样的系统供电,使用正常,换成LM5007就出现上述情况。希望各位老师可以提供解决意见,谢谢!