BQ34Z100-G1: BQ34Z100-G1 chips on board have a fever

Jackie Guo

Part Number: BQ34Z100-G1

Dear all,

We find that some BQ34Z100-G1 chips on our board have a fever.The internal temperature read out is up to 91℃. After a power off and on,then the internal temperature can decrease to nomal state.My question is：why these chips have a fever?

over 6 years ago

0 Bryan Kahler over 6 years ago

TI__Mastermind 25955 points

Hi User4291752,

Please ensure that the design follows the recommendations in the datasheet and that the schematic follows the guidelines given in the user manual, found here:

www.ti.com/.../bq34z100-g1

www.ti.com/.../sluu904

Sincerely,
Bryan Kahler

0 Jackie Guo over 6 years ago in reply to Bryan Kahler

Prodigy 100 points

0880.1.pdfHi Bryan,

The schematic is like the attachment. The chip is power by a 3.3V LDO and a MCU also powered by this LDO communicates with it by I2C. The REG25 pin of the chips which have a fever are all 3.0V.What's problem with these chips?

0 paik nam woong over 6 years ago

Prodigy 120 points

e2e.ti.com/.../382516

I guess Connection Noise make that problem.. when the battery is connected..
RC Filter can Reduce that entering abnormal condition...
Please add RC Filter @REGIN pin...

0 Jackie Guo over 6 years ago in reply to paik nam woong

Prodigy 100 points

Thanks for your reply.Had you solved your problem?

0 paik nam woong over 6 years ago in reply to Jackie Guo

Prodigy 120 points

yes... it solved... But.. not perfect..
If i try to enter abnormal condition by force..... (repeat and repeat...immediately...with short interval..)
It entering abnormal Condition..Fever condition..
But No problem to use..