BQ25898D: About Charging Current

user777540

Part Number: BQ25898D
Other Parts Discussed in Thread: BQSTUDIO

hello,

question 1
I have a question about Charging Current in Figure 17 of the data sheet.
When Cool (0 ° C to 10 ° C), ICHG is limited to 0.2 ICHG.
Will Termination Current also change?
If so, is the current limited to 0.2x, similar to ICHG?

Question 2
This is a screen copy of bqStudio when NTC Fault is Cool.
Charging Current is 50mA. What kind of calculation should I do to get 50mA?

best regards

over 5 years ago

0 Ning T over 5 years ago

TI__Guru 59431 points

Hi,

1:Charge termination is temporarily disabled during input DPM or thermal regulation or TS Cool temperature T1-T2.

2: Please refer to https://e2e.ti.com/support/power-management/f/196/p/780848/2887439#2887439

Thanks,

Ning.

0 user777540 over 5 years ago in reply to Ning T

Expert 1020 points

hello,

I have a question about the answer to question 1.

What is temporary about temporarily disabled?
Will charging not end forever?
Or will the charging end when the Termination Current Limit is disabled and the battery voltage reaches the Charge Voltage Limit?

Or, even if the battery voltage reaches the Charge Voltage Limit and the charging current reaches 0A, does the charging not end?

Excerpt from question 1
Charge termination is temporarily disabled during input DPM or thermal regulation or TS Cool temperature T1-T2.

best regards

0 Ning T over 5 years ago in reply to user777540

TI__Guru 59431 points

Hi,

When input DPM or thermal regulation or TS Cool temperature T1-T2, the device will not terminate charging, i.e. keep charging because the charging current can be less than the programmed value.

Thanks,

Ning.

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BQ25898D: About Charging Current