BQ27220: Thermistor connection shared between BQ27220 and BQ25170

Siva R

Part Number: BQ27220
Other Parts Discussed in Thread: BQ25170,

Tool/software:

I have used BQ27220 and BQ25170JDSGR for fuel guage and charger IC respectively in my system. I have connected BIN pin and TS pin of BQ27220 and BQ25170 IC respectively with thermistor (10K) to ground. Now the value 400mV in TS pin is not coming and charging gets intermittent (ON and OFF). Kindly suggest us for charging it properly. In one of our board it is working properly but in other boards it is not charging intermittently. In other boards after removing fuel gauge IC, charging is done properly,fyi

Thanks

R.Sivasuryan

8 months ago

0 Alan Frias 8 months ago

TI__Mastermind 36595 points

Hello Siva,

Today is a national holiday, and we will work on your ticket in the upcoming business days.

Thank you,
Alan

0 Jonny 8 months ago in reply to Alan Frias

TI__Mastermind 27231 points

Hello,

This seems like it could be related to the charger. The BQ27220 does not have integrated protections and therefore does not interfere with the charging of the battery. I recommend re-posting this question to the charger team.

Regards,

Jonny.

0 Siva R 8 months ago in reply to Jonny

Prodigy 100 points

will it bias the BIN pin as we have connected the same line shared with TS line of BQ25170 ?

Power management

Power management forum

BQ27220: Thermistor connection shared between BQ27220 and BQ25170