BQ40Z50EVM-561: Evaluation board stops responding shortly

RUNNING GAO

Prodigy 250 points

Part Number: BQ40Z50EVM-561
Other Parts Discussed in Thread: BQSTUDIO

Hi,

I am reporting an error 'No acknowledge from device'. Below is my set up.

- EV2400 connected to a PC

- No load connected between PACK+ and PACK-

- Power on the EVM with a voltage of 16V Li-ion battery

- Launching BQstudio

- Pressing wake button it recognizes the device and works

- No response in 1-2 seconds, with error 'No acknowledge from device'.

I attach the control panel with 'Before and After' look.

I did look into the solutions to similar questions,

link 1: e2e.ti.com/.../840745

link 2: e2e.ti.com/.../775205

Unfortunately they are not helpful in this case.

Please advise. Thank you.

Best,

Rayna

over 4 years ago

0 RUNNING GAO over 4 years ago

Prodigy 250 points

0 Nick Brylski over 4 years ago in reply to RUNNING GAO

TI__Mastermind 19195 points

Hi Rayna,

You must configure the NR bit within DA config. Refer to TRM.

Best regards,

0 RUNNING GAO over 4 years ago in reply to Nick Brylski

Prodigy 250 points

Hi Nick,

Thanks for your prompt reply.

Could you please specify your answer for me? As a newbie first timing using the board, the brief answer is a bit confused to me.

Best,

Rayna

0 Nick Brylski over 4 years ago in reply to RUNNING GAO

TI__Mastermind 19195 points

Hi Rayna,

The gauge is configured for removable mode by default. Please refer to 13.3.1.13 of TRM.

Best regards,

0 RUNNING GAO over 4 years ago in reply to Nick Brylski

Prodigy 250 points

Hi Nick,

Does the TRM you mentioned refer to BQ40Z50EVM? If so, could you please point out which document (TRM) you indicate? Link: https://www.ti.com/tool/BQ40Z50EVM-561?keyMatch=BQ40Z50EVM&tisearch=Search-EN-everything#tech-docs Thank you.

Best,

Rayna

0 Nick Brylski over 4 years ago in reply to RUNNING GAO

TI__Mastermind 19195 points

Hi Rayna,

Here is the link to the TRM: https://www.ti.com/lit/ug/sluua43a/sluua43a.pdf

Best regards,

0 RUNNING GAO over 4 years ago in reply to Nick Brylski

Prodigy 250 points

Hi Nick,

I change the NR to high to put gauge in non-removable mode. However the output from dashboard shows the EVM is on and off (flashing in 1s repeatedly). The error at bottom is 'initial read fail...' Please advise. Thank you.

0 Nick Brylski over 4 years ago in reply to RUNNING GAO

TI__Mastermind 19195 points

Hi Rayna,

Can you try restarting bqstudio?

BR,

Power management

Power management forum

BQ40Z50EVM-561: Evaluation board stops responding shortly