BQ51050B: The IBAT of BQ51050BEVM-764 vibrates violently during Fast-Charge, and the charging current is unstable.

Evangeline

Part Number: BQ51050B
Other Parts Discussed in Thread: BQ500212AEVM-550

Hi,

As title. The TX uses BQ500212AEVM-550. According to the operation of 6.3 Equipment Setup and 6.4 Procedure in the BQ51050BEVM-764 User guide, IBAT jitters severely during Fast-Charge, and the maximum jitter amplitude is about 620mA. Is this phenomenon normal? And why does this phenomenon occur? The screenshots as shown below.

Thanks.

Kind regards,

Evangeline

over 4 years ago

+1 Bill Johns over 4 years ago

TI__Guru* 76916 points

Hello Evangeline

The jitter looks like communication current limit. Time between the drops in current should be about 250mS and the current will drop to about 400mA at this time.

This would be normal.

0 Evangeline over 4 years ago in reply to Bill Johns

Prodigy 30 points

Hi Bill,

Got it. Thanks a lot.

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BQ51050B: The IBAT of BQ51050BEVM-764 vibrates violently during Fast-Charge, and the charging current is unstable.