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BQ27542-G1: bq

JUNHYUK SUH1
Prodigy 30 points
Part Number: BQ27542-G1
Other Parts Discussed in Thread: BQ25890

Hello, Sir

I used BQ25890 as a charger and BQ27542DRZ-G1 as a fuel guage.   Regarding to this, our firm engineer tried to communicate via I2C of BQ27542.  But, he said there is no response from BQ27542.

So, I want to know if there is any problem with circuit.   Except for BQ27542, the other I2C component is normally operated. 

Can anybody help me to solve this problem.   I have attached schematic..

thanks.

  • 0
    TI__Guru* 76230 points

    Hi Junhyuk,

    I don't understand j6 connector of your board. Is pin 2 and pin 4 connected? That should  not be if that is the case.

    Can you place a scope on the TS pin and also measure reg25 pin so we determine if the gauge is getting power? Also, capture  scope shots of the clock and data lines so we  see if the device is Nacking ? What address are you trying to communicate with the gauge wirh?

    thanks

    Onyx