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TIDM-02002: 从原边到副边工作,关于副边同步整流的疑问,副边PWM为什么提前关断了?

Part Number: TIDM-02002


如图所示

ch1 是原边Q100的PWM驱动波形

ch2是副边 ISNS_SEC_TANK 过CMPSS Output XBAR1的信号波形

ch3是副边 ISNS_SEC_TANK 的信号波形

ch4是副边Q102的PWM驱动波形

工作状态是从原边到副边 频率在700K,从示波器中很明显看出来副边Q102波形提前关断了,不应该是ch2从低到高时,才关断吗?