BQ27441-G1: Higher Design Capacity version

Adam Bierman

Part Number: BQ27441-G1
Other Parts Discussed in Thread: BQ27Z561, BQ27Z561-R1

Hello,

I'm looking to replace this fuel gauge with one that has a higher capacity to handle a new 8.5AHr battery my design will be using. I'd like to find something as close to this as possible to minimize design impact. What would be recommended? I was looking through the options on your website but none of the design capacity values are correctly listed and/or match their TRM it seems so I figured I'd ask directly.

over 5 years ago

0 Kang Kang over 5 years ago

TI__Mastermind 24870 points

Please look at the bq27z561.

0 Adam Bierman over 5 years ago in reply to Kang Kang

Intellectual 710 points

This IC appears to be a pack side fuel gauge, whereas the BQ27441 is a system side gauge, won't this present a problem in trying to implement the BQ27Z561 in the existing design where the IC is on the system PCA?

0 Andy Liu (BMS) over 5 years ago in reply to Adam Bierman

TI__Guru 52115 points

If the battery is NOT removable in your system and always connects to the gauge, you can use the bq27z561.

Andy

0 Adam Bierman over 5 years ago in reply to Andy Liu (BMS)

Intellectual 710 points

Hi Andy,

Ok thank you I think that gives me what I need. I have a flat pack LiPO in an embedded application. So when the product is assembled that battery is never disconnected from the PCA. Sounds like that application will be OK then for this IC. The battery can be disconnected from the PCA where this IC would be installed, it just would never be intended to be and this would only occur during service or repair. That is an appropriate application for this IC?

0 Rushi_Dalal over 5 years ago in reply to Adam Bierman

TI__Intellectual 2025 points

Hi Adam,

Please use BQ27z561-R1, it is the updated version of BQ27z561.

Thanks,

Rushi

0 Adam Bierman over 5 years ago in reply to Rushi_Dalal

Intellectual 710 points

Thank you! What is the difference between these ICs?

0 Rushi_Dalal over 5 years ago in reply to Adam Bierman

TI__Intellectual 2025 points

Hi Adam,

The BQ27z561-R1 simply has updated FW, HW wise it is the same device. The change list is published here: https://www.ti.com/lit/an/slua956/slua956.pdf

Thanks,

Rushi

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BQ27441-G1: Higher Design Capacity version