Other Parts Discussed in Thread: CSD,
Tool/software:
Hi Team,
We are using BQ25798 2s battery charging (7.4v 1200mAh), we are connected 5V/2A adapter. the BQ25798 is in default mode and the host device stm32 is only interface for getting battery voltages from ADC only when I power ON the device.
Sequence 1 :-mode sequence when device is turn ON and BQ25798 is charging (REG_RST reset(9h)->stop watchdog timer(10h)-> enable ADC(2Eh)->read ADC value(3bh) for battery voltage in 2sec timer)
Sequence 2 :-host mode sequence when device is turn OFF and BQ25798 is charging (REG_RST reset(9h)->Enable watchdog timer(10h))
issues:
1)Condition when BQ25798 is in autonomous mode or default Note when we connect i.e. replace (6.65v) battery and I don't power the host, the battery gets charge successfully at 8.4v and state led turn off indicating charging complete. But when I replace new battery (6.65v) and restart charging sometime the battery doesn't charge even the state led is also on continuous.
2) Condition when BQ25798 is charging in autonomous mode or default and I turn ON (Sequence 1) the host check the ADC battery voltage value and power OFF (Sequence 2) the host, the battery charging stops, but state led remains on.
3)While continues testing with above 2 conditions my BQ25798 gets damage and vsys shows 0V even my battery voltage is 8V.
4) What is actual voltages of below pins on default condition when charger connected or charger disconnected (TS , ILIM_HIZ, REGN, PMID, BQ STAT PIN NO 1).?
5)Also check if there should be any modification in the schematic. also suggest us if NTC and CSD is required or not.
Please help us with resolving issue.
Thank you.
I hope you will resolve all my queries?
