BQ24610: BQ24610 can not charge issue

Star Xu

Part Number: BQ24610

The customer design with BQ24610, the PCBA made by EVM Gerber used on the official website. During the test we found that both HIDRV and LODRV have waveforms, but the battery cannot be charged.

Attached the schematic

CH2: Q3 Gate

CH3: Q4 Gate

CH4: N/A

Please help check it.
Thanks
Star

4 months ago

0 Christian Moyer 4 months ago

TI__Genius 12505 points

Hello Star,

What is the input voltage/ current?

What is the battery voltage?

What is the status of STAT1 and STAT2?

Best Regards,

Christian.

0 Ray Choi 4 months ago

Prodigy 20 points

The input voltage is 16V-21V, no current as charging process doesn't happen.

Battery voltage is 7.6V, it is 2 cell battery which full charged voltage is 8.4V

STAT1 ON, STAT2 OFF

0 Christian Moyer 4 months ago in reply to Ray Choi

TI__Genius 12505 points

Hello Ray,

Did you make any changes to the original schematic or gerber files?

Can you capture a waveform of PH/TP8?

What is the voltage on SRN/SRP?

Do you have a system load?

Best Regards,

Christian

0 Ray Choi 4 months ago in reply to Christian Moyer

Prodigy 20 points

R25 is changed to 300k, 6.8uH is rate 2.2A, all other components are same as suggested BOM.
We don't have system load.

waveform is below,

CH1：PH

CH2： SRP

CH3： SRN

0 Christian Moyer 4 months ago in reply to Ray Choi

TI__Genius 12505 points

Hello Ray,

I'm looking into this issue, and will provide you with an update after I gather more information.

Best Regards,

Christian.

0 Christian Moyer 4 months ago in reply to Christian Moyer

TI__Genius 12505 points

Hello Ray,

Can you try adding a DC load ( 2.2A CC mode) to the battery output ( with battery removed), and recapture the PH waveform.

Best Regards,

Christian.

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BQ24610: BQ24610 can not charge issue