BQ27621-G1: single cell solution

Jeff YANG

Mastermind 7745 points

Part Number: BQ27621-G1
Other Parts Discussed in Thread: BQ27220, BQ34Z100

Tool/software:

Hi,

We have singel cell guage demand as below. Would you please suggest new part for us?

1. VBAT>4.6V

2. Li-ion polymer

3. System side guage not in pack

4. Singel cell

Thanks!

Jeff

7 months ago

0 Adrian 7 months ago

TI__Mastermind 37761 points

Hello Jeff,

I would recommend the BQ27220: https://www.ti.com/product/BQ27220

Regards,

Adrian

0 Jeff YANG 7 months ago in reply to Adrian

Mastermind 7745 points

Hi Adrian,

I found LDO input from VBAT only support to 4.5V, we found some high power density cell already support to 4.5V.

Do you have 4.6V or higher guage solution? thanks!

0 Adrian 7 months ago in reply to Jeff YANG

TI__Mastermind 37761 points

Hello Jeff,

Do not think we have a solution as our single cell gauges are spec'ed up to 4.5V for the Vbat max. What chemistry of battery are you using?

Regards,

Adrian

0 Jeff YANG 7 months ago in reply to Adrian

Mastermind 7745 points

Hi Adrian,

Li-ion polymer, as customer description new cell technology is raise to 4.5V for higher power density.

Thanks!

0 Diego 7 months ago in reply to Jeff YANG

TI__Mastermind 25615 points

Hi,

BQ34z100 can support higher voltages using an external voltage divider.

The customer will need to reupload their golden image to the gauge upon a new battery being inserted.

Regards,

Diego

0 Jeff YANG 7 months ago in reply to Diego

Mastermind 7745 points

Hi Diego,

BQ34z100 package is big, is there have small package with VBAT can support 4.6V or above? thanks!

Jeff

+1 Adrian 7 months ago in reply to Jeff YANG

TI__Mastermind 37761 points

Hello Jeff,

Unfortunately that is the only gauge that will fit your requirements.

Regards,

Adrian

0 Jeff YANG 7 months ago in reply to Adrian

Mastermind 7745 points

Hi Adrian,

Got it, thanks!

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BQ27621-G1: single cell solution