Please check the Mos driver waveform of MP9928

Hi, MPSer
Please help to check the Mos driver waveform of MP9928, the driver’s input voltage is 24V and output 12V/6A,now we tested component temprature isn’t balance,the upper side of Mos Q4 is higher than low one of Q5. we found their time of Ton is diffrent between two mosfet. please explain the pheanomeno and give some insturctions to find the cause,thanks

1.Two Mosfet’s driver waveform:

2.Schematic:

  1. We have a similar sample from customer and we test it ok.