BQ25895M: what's the reason？？？

Gary Gaooo

Part Number: BQ25895M

Hi TI experts,

At present, it is found that the value detected by ADC is about 0.1 V higher when reading the power. It will take about 20-30 minutes before the value detected by ADC is the same as the actual value.

why？

over 4 years ago

0 Jeff F over 4 years ago

TI__Guru*** 143880 points

Hi Gary,

The ADC has limited 7-bit resolution. It measures voltages at the IC pins. Are you also measuring your voltages at the IC pins?

Regards,

Jeff

0 Gary Gaooo over 4 years ago in reply to Jeff F

Intellectual 775 points

Yes

0 Gary Gaooo over 4 years ago in reply to Jeff F

Intellectual 775 points

Yes, I measuring voltages at the IC pins

0 Gary Gaooo over 4 years ago in reply to Jeff F

Intellectual 775 points

0 Jeff F over 4 years ago in reply to Gary Gaooo

TI__Guru*** 143880 points

Gary,

Then the difference is either due to the limited 7-bit resolution or current or voltage ripple that is not being averaged out.

Regards,

Jeff

Power management

Power management forum

BQ25895M: what's the reason？？？