BQ27532 locking up

Ignacio Linares

I have a customer with the following issue:

Having trouble with the TI gas gauge BQ27532, sometimes it locks up and returns the value 0xFFFF at every I2C transaction. I can't seem to do a soft reset and the part does not have a hardware reset pin. When it gets into this mode the only thing I can do to get it back is to power cycle by unplugging the battery, not something I want my customers to do.

Any suggestions?

over 8 years ago

0 Kang Kang over 8 years ago

TI__Mastermind 24870 points

Hello Ignacio,

Could you send a scope plot of the I2C waveform? Is the IC nacking? 0xFFFF might mean you are not pulling the lines low. Are you seeing clock waveforms?

0 Rob Tow1 over 7 years ago

Prodigy 10 points

Hi,

We have a design that incorporates this part, and sometimes gets locked up as well.

Did you get any resolution to this?

0 Ignacio Linares over 7 years ago in reply to Rob Tow1

Expert 1655 points

No. The last action was for my customer to provide scope shots for me to send into TI. He never did. As far as I know, he has not solved the issue on his own.

Power management

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BQ27532 locking up