To you for help:
BUCK/BOOST switching power supply, the waveform of the MOS pipe is always wrong, the signal rise time special long, then reduce the bootstrap capacitance u F from 10 to 4.7 u F and G level driving resistance from 100 to 10, the effect is not so good, don't know where the problems at present,

Schematic diagram:


Q1 tube waveform BUCK) after change the bootstrap waveform:


Q2 pipe under the waveform BUCK) change after the bootstrap waveform


MOS tube parameters:




Drive chip parameters: