bq24074 TS issue

PAN-M

Dear all.

When TS exceeds the temperature range in charge state, a charge is suspended.
When the CV mode in charge state, even if TS usually returns in the state, a charge isn't resumed.
Charge CV mode -> TS over/under temp -> charge suspend -> TS normal temp -> charge isn't resume

Is it correct?

Regards,
PAN-M

over 9 years ago

0 Jing Zou over 9 years ago

TI__Mastermind 20570 points

What is the voltage on the BAT pin? Can you provide the scope capture on VBAT, IBAT, TS pin the the test procedure you described in the above?

0 PAN-M over 9 years ago in reply to Jing Zou

Mastermind 8375 points

bq24074_TS_issue.pptxOur customer measured waveform.
Even if TS becomes normal temp., CHG doesn't return.

Even if TS changes at CC mode, CHG is Low.

Regards,
PAN-M

0 PAN-M over 9 years ago in reply to PAN-M

Mastermind 8375 points

Would you please give your feedback to me?

0 Jing Zou over 9 years ago in reply to PAN-M

TI__Mastermind 20570 points

When charging is in CV mode, for example, the battery voltage here is 4.17V which is higher than the VRCH threshold. When the TS returns back to the normal range, VBAT needs to be below VRCH threshold for the charging to resume.

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bq24074 TS issue