BQ25172: BQ25172DSG TMR Resistor

Tom Hong

Prodigy 40 points

Part Number: BQ25172

Tool/software:

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觀看BQ25172DSG相關資料，了解透過TMR Pin Detection resistor seting 來決定充電時間以及透過BATTERY CHARGER PROTECTION:1.7V 進行過電壓保護。

目前使用專案使用Ni-MH cell 900mA 2串兩並。

預設TMR:15Kohm(12hours)、VSET:27Kohm、ISET:1.5Kohm。

請問這樣的設定是否有問題，比較想確認的是在TMR 設定是建議18kohm 或是15kohm ?

以及請提供關於鎳氫電池耐受過度充電的測試數據?

Hello

View BQ25172DSG related information to learn how to determine the charging time through TMR Pin Detection resistor setting and over-voltage protection through BATTERY CHARGER PROTECTION:1.7V.

The project uses Ni-MH cell 900mA 2 series 2 parallel batteries.

Preset TMR: 15Kohm (12 hours), VSET: 27Kohm, ISET: 1.5Kohm.

Is there any problem with this setting? I would like to confirm whether 18kohm or 15kohm is recommended for TMR setting?

And please provide test data on NiMH battery's tolerance to overcharge?

7 months ago

0 Bill Johns 7 months ago

TI__Guru* 75486 points

Hello

Tom Hong said:
Preset TMR: 15Kohm (12 hours), VSET: 27Kohm, ISET: 1.5Kohm.

Is there any problem with this setting? I would like to confirm whether 18kohm or 15kohm is recommended for TMR setting?

ISET 1.5k ohm, this is 200mA charge current. For 900mAh X 2 for battery configuration, TMR setting of 10 hours would be minimum, 12 hours would be better setting.

VSET of 27k is good.

Tom Hong said:
And please provide test data on NiMH battery's tolerance to overcharge?

What battery manufacture are you using and can you share data sheet?

0 Tom Hong 6 months ago in reply to Bill Johns

Prodigy 40 points

請提供鎳氫電池耐過充性的測試數據？

+1 Bill Johns 6 months ago in reply to Tom Hong

TI__Guru* 75486 points

Hello

請提供鎳氫電池耐過充性的測試數據？---- Please provide test data on the over-charge resistance of the NiMH battery?

What battery manufacture are you using and can you share data sheet?

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BQ25172: BQ25172DSG TMR Resistor