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LM5148: 主MOSFET关断后出现短时驱动脉冲(非开关周期的下一个脉冲)

Part Number: LM5148

BUCK电源中LF3滤波电感去除,用导线接通电路,测试问题依然存在。输出电流超过2A时,驱动出现如下图。输出电压变得不稳定,继续增加负载,输出电压开始下降。

蓝色:直流出电压

紫色:MOSFET驱动

绿色:同步MOSFET驱动