Charger IC selection

Feng bin Su

Expert 7870 points

Other Parts Discussed in Thread: BQ21061, TLV810E

Hi team,

My customer are developing a tracker with 3.7V Li-Battery and they need a charge IC with power path function,.

and they hope the IC has discharge threshold of battery voltage(EX.3.5V...) such as overdischarge protection function.

Do you have suggestion solution for it?

over 3 years ago

0 Wyatt Keller over 3 years ago

TI__Guru** 102955 points

Hello Feng,

I am going to direct your question to the chargers team.

Sincerely,

Wyatt Keller

0 Jeff F over 3 years ago

TI__Guru*** 148015 points

Hi Feng,

None of our chargers have over-discharge protection above ~2.5V. That is a feature for the pack protector IC. If you can provide the input voltage and current and the battery voltage and capacity, I can recommend a the appropriate path charger.

Regards,

Jeff

0 Feng bin Su over 3 years ago in reply to Jeff F

TI__Expert 7870 points

Hi Jeff,

Thank for your help.

Customer spec is as below.

input voltage :5V，battery voltage ,TYP 3.7V，MAX4.2V ， capacity 300mAh.

Originally, they choose BQ21061 and it seems that they faced some overdischarge issue so they would like to check whether Vbat UVLO can be programmable IC achieve higher . 3.2V is their target.

Sorry, I didn't find the filter about it at ti.com.

0 Jeff F over 3 years ago in reply to Feng bin Su

TI__Guru*** 148015 points

Hi Feng,

I am not aware of any charger that allows the user to set the VBATUVLO. The expectation is for the protector to provide that function. Does the battery not have a protector? We do not recommend using our chargers to charge bare cells. If your customer does not want to use a protector, then perhaps they can add series back to back PFETs driven by a supervisor like TLV810E.

Regards,

Jeff

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Charger IC selection