BQ27542-G1: SCH and GG file review help

Bruce li

Genius 5580 points

Part Number: BQ27542-G1
Other Parts Discussed in Thread: BQ28Z610, TLV2241, BQ27541

Dear TI Experts,

Could you kindly help to review attached schematics and gg file of BQ27542? Thanks a lot.

2656.BQ27542.zip

over 5 years ago

0 Onyx Ahiakwo over 5 years ago

TI__Guru* 76230 points

Hi Bruce,
-the bq27542 is a single cell gauge, but it appears you have 2 cells in series and a voltage divider. is there a reason you didn't simply use the bq28z610 which is a 2s gauge?
-I do not see a need for the TLV2241 circuit as this is a pack side gauge. battery will be embedded and will always be with the chip. i do not see the need for that TLV part
-You are using a 2mohm sense, the recommended min for this gauge is 5mohm.

A quick review of the gg file shows it looks good.

thanks
Onyx

0 Bruce li over 5 years ago in reply to Onyx Ahiakwo

Genius 5580 points

Dear Onyx,

Yes, this design is for 2S, and it is revised from below BQ27541 reference design for 2S1P. I have promoted BQ28z610 to customer for 2S pack,

yet customer still want to try BQ27542 solution since the limited cost requirment and tight time schedule.

Could you kindly give some further advices for such application? Thanks a lot.

0 Onyx Ahiakwo over 5 years ago in reply to Bruce li

TI__Guru* 76230 points

This looks ok
thanks
Onyx

0 Bruce li over 5 years ago in reply to Onyx Ahiakwo

Genius 5580 points

Dear Onyx,

Got it, thanks for your support.

Power management

Power management forum

BQ27542-G1: SCH and GG file review help