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LM5117 双脉冲问题

Other Parts Discussed in Thread: LM5117, CSD19531Q5A

Hi sir,

我的客户目前使用的LM5117与RENESAS MOSFET设计的电源,但目前RENESAS MOSFET进入EOL!
我建议客户使用CSD19531Q5A来取代它,但目前测试结果发现在相节点部分会有双脉冲现象如下图,
以肖特基二极管与原RENESAS MOSFET验证后,并不会有此现象,可以帮忙确认是什么问题吗?谢谢.

规格如下
输入电压48V
输出8V/ 1.5A
双脉冲问题直流负载0.5A1.5A

RENESAS MOSFET

Schematic

Waveform

Purple : Vout
Yellow : SW

RENESAS MOSFET