We use your company's bq25792 to design the battery charging circuit, and the following problems appear:
1.The output voltage of sys is unstable when only VBUS is used. There is a jump every 1.37s,and the voltage of each jump will decrease about 2.12V,The captured waveform is as follows .
2.The output of sys is stable when using battery power supply or VBUS + Vbattery (Vbat > 3.5V)
The circuit diagram is attached, please help to confirm the cause of the defect