BQ40Z80: Initial Start and Communication

Markus Erlebach

Part Number: BQ40Z80
Other Parts Discussed in Thread: BQSTUDIO

Hi,

my issue is the first communication with the BQ40Z80 via bqStudio on a board which is designed close to the EVM schematic. I checked the voltages at the Bat+ and the Packpin as described in a few other questions but can't communicate with it.

I checked the TS Pins for a pulse but can't measure anything. Is this the only indicator that the gauge is defect or are there any other options if it is damaged or simply doesn't wake up?

over 5 years ago

0 Andy Liu (BMS) over 5 years ago

TI__Guru 52115 points

Try connecting the SYS PRES pin to PACK–.

0 Markus Erlebach over 5 years ago in reply to Andy Liu (BMS)

Prodigy 30 points

Thanks for your fast reply.

I also tested this but still nothing. I connected every signal similar to the EVM board. That's why i wanted to know if there is another way to see if the device is still intact.

0 Andy Liu (BMS) over 5 years ago in reply to Markus Erlebach

TI__Guru 52115 points

I would suggest you try another device. If that part still fails, compare your scheamtic with the EVM schemaic and see if there is any issue.

Andy

Power management

Power management forum

BQ40Z80: Initial Start and Communication