Other Parts Discussed in Thread: BQ24195
Because our design requires that the system should be able to start up normally even without battery. However, when the system is started up without battery, the output ripple of Vsys is very large, which directly leads to the abnormal output of PMIC voltage at the back end. The system cannot get up and the registers cannot be configured through I2C.
So we need a solution that allows the BQ24195L Vsys waveform to work properly (or not in PFM mode) without the battery and the register configuration.
The Vsys waveform when BQ24195L power on without battery is below:
The Vsys waveform when BQ24195L power on with battery is below: