bq24230EVM / CHG LED(D1)

K.Yaita

Other Parts Discussed in Thread: BQ24230EVM, BQ24230

Hi Team,

When I apply 5V supply for bq24230EVM, CHG LED(D1) emits light for a moment even if battery is unconnected.
Is it normal function for bq24230?
I would also like to know why it occures.

Best Regards,
Yaita / Japan disty

over 10 years ago

0 Wenjia Liu over 10 years ago

TI__Expert 7730 points

I think there's some deglitch time before the IC can determine if there is a battery connected.

Thanks,

Wenjia

0 K.Yaita over 10 years ago in reply to Wenjia Liu

Guru 29720 points

Hi Wenjia-san,

I think the datasheet doesn't show the specification of deglitch time.
Is my understanding correct?

Best Regards,
Yaita

0 Wenjia Liu over 10 years ago in reply to K.Yaita

TI__Expert 7730 points

Yaita-san,

Please refer to the flow chart on page#20 of the datasheet. Once the IC is powered up, the IC will detect if the battery is shorted or not, if not, /CHG will be pulled low. But as soon as the IC detects there's no charging current or the current is below ITERM, the /CHG will be pulled high. Therefore, the /CHG will be pulled low for a short amount of time before IC detects no charging current.

Thanks,

Wenjia

Power management

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bq24230EVM / CHG LED(D1)