BQ27411-G1: LTO 6S2P Battery gauge

Needhu Gunasegaran

Part Number: BQ27411-G1
Other Parts Discussed in Thread: BQ34110

Hello Team,

Could you please help me answer my customer question,

we are looking for a battery gauge IC for LTO 6S2P configuration, please suggest a solution which support deep temperature charging of LTO (1.5A each cell > 3A @ -40°C)

Thanks,

Needhu

over 5 years ago

0 Wyatt Keller over 5 years ago

TI__Guru** 104905 points

Hello Needhu,

This is a pretty extreme temperature, let me check this and get back to you.

Sincerely,

Wyatt Keller

0 Kang Kang over 5 years ago in reply to Wyatt Keller

TI__Mastermind 24870 points

Hello Needhu,

Please check the bq34110 and see if the CEDV gauge will work. The LTO cells operate at a lower voltage so you'll need to order an EVM on your end and try it.

0 Needhu Gunasegaran over 5 years ago in reply to Kang Kang

TI__Intellectual 2890 points

Hello,

Thank you for the suggestion. The EVM is ordered.

Can you help with following question?

Which ICs you would recommend for balancing, current switch and 2^nd level protection?

Thank you in advance,

Best Regards,

Needhu

0 Needhu Gunasegaran over 5 years ago in reply to Kang Kang

TI__Intellectual 2890 points

Hello,

Thank you for the suggestion. The EVM is ordered.

Can you help with following question?

Which ICs you would recommend for balancing, current switch and 2^nd level protection?

Thank you in advance,

Best Regards,

Needhu

0 David Hien over 5 years ago in reply to Needhu Gunasegaran

TI__Genius 10830 points

Hallo Needhu,
For protection & balancing, you can stack 2 BQ77915 (primary protection IC w/ cell balancing, stackable).
For secondary protection IC, you can stack 2 BQ7718.
If you needed a monitor with protection included, in addition to the gauge mentioned above, you can look at BQ76942.

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BQ27411-G1: LTO 6S2P Battery gauge