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BQ25890H: system will reboot without battery

Part Number: BQ25890H

Hi team,

My customer had design in BQ25890H and find out some issue.

They want to use only USB3.0 as power supply to power up our product without battery.

But when system is booted up about 10 sec, the system will reboot again and again.  

I found  a similar issue :


Is there any way to make system boot up normally without battery?

Or as the information of above link, we should set Vsys up to 2.2V?

Additionally, how to set Vsys value?

Could I change the Vsys value by setting register or anything else?