BQ25898: Can CHG_CONFIG bit override CE/ state?

Sabarish Subramanyan

Prodigy 40 points

Part Number: BQ25898

Hi,

1. Can CHG_CONFIG bit override CE/ state? Say if CE/ is HIGH and I set CHG_CONFIG bit can i initiate the charging?

2. If CE/ pin is externally pulled HIGH, can I start and stop charging by controlling only CHG_CONFIG bit?

Regards,

--Sabarish

over 8 years ago

0 Jeff F over 8 years ago

TI__Guru**** 166576 points

Sabarish,

Turning off charge always takes precedence. For example, if /CE pin is high, charge is disabled regardless of CHG_CONFIG status and vice versa.

0 Sabarish Subramanyan over 8 years ago in reply to Jeff F

Prodigy 40 points

Thank you Jeff for quick response
1. So the charge enable is a AND logic of /CE and CHG_CONFIG bit. Only if both are "1" charger is enabled else disabled?
2. I will connect /CE to REGN externally and use host GPIO to enable/disable with CHG_CONFIG bit always set high. Let me know if this scheme works or not.

0 Jeff F over 8 years ago in reply to Sabarish Subramanyan

TI__Guru**** 166576 points

Regarding 1, yes, the logic of inverted /CE and CHG_CONFIG is AND.
Regarding 2, I suggest pulling /CE to REGN through a 10kohm resistor and then using host GPIO to control /CE. CHG_CONFIG defaults to high.

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BQ25898: Can CHG_CONFIG bit override CE/ state?