BQ27531-G1: About register Chrgr_TermTimer_Reg5()

user6181012

Prodigy 250 points

Part Number: BQ27531-G1
Other Parts Discussed in Thread: BQ24193, BQSTUDIO

Hi everyone,

We are developing a charger using bq27531-G1 and bq24193.

Please tell me about the timeout setting of bq27531-G1.

We set Chrgr_TermTimer_Reg5() to 0x18. Timeout is 5 hours.

Chrgr_Fault_Reg9() became 0x30 in 2 hours and 14 minutes from the start of charging.

The SOC value when the timeout occurred was 0x27 (39%).

what is the reason?

Thank you in advance.
Best regards,

k.saito

over 5 years ago

0 Wyatt Keller over 5 years ago

TI__Guru** 105770 points

Hello,

Let me look into this and get back to you.

Sincerely,

Wyatt Keller

0 Wyatt Keller over 5 years ago

TI__Guru** 105770 points

Hello,

Can you provide a log file and .gg of when the time out occurs? Also does this happen 100% of the tests?

Sincerely,

Wyatt Keller

0 user6181012 over 5 years ago in reply to Wyatt Keller

Prodigy 250 points

Hello

Thank you for your reply.

Attach the gg file.

TEST_Ver2235_gg.gg.csv

I don't know if it happens 100%.

We will check again and present the log.

best regard

k.saito

0 user6181012 over 5 years ago in reply to user6181012

Prodigy 250 points

Hello

Thank you for your reply.

We have confirmed that a timeout has occurred.
Attach the log.CHARGE_TIMEOUT.log

The 11th line of the log sets the timeout to 8H.

A timeout occurred at line 1569 in the log, and REG9 is 0x30.

Even though the time-out is set to 8H, the time-out occurs at 19:07 from the start of charging at 17:48.

Please tell me what is happening.

best regard

k.saito

0 Wyatt Keller over 5 years ago in reply to user6181012

TI__Guru** 105770 points

Hello,

Could you provide a log from bqStudio so we can see all the registers? Is it happening 100% of the time?

Sincerely,

Wyatt Keller

0 user6287931 over 5 years ago in reply to Wyatt Keller

Intellectual 350 points

Hello,

Sorry for the interruption.

I am also participating in the same development project.

If REG09[5:4] goes 11,Is it always a timer expiration?

Is there any condition that the timeout occurs in a shorter time than the set condition?

(except the one hour time out when it is lower than BATLOWV)

Best Regards,

Y.Kuramoto

0 Wyatt Keller over 5 years ago in reply to user6287931

TI__Guru** 105770 points

Hello,

No problem!

I believe it should always be a timer expiration, did you check the charger's information to see if it has any influence on the gauge?

Sincerely,

Wyatt Keller

0 user6287931 over 5 years ago in reply to Wyatt Keller

Intellectual 350 points

Hello,

We cannot get log because of no reproduction.

Please check below step if there any problem.

----

・Charger power on　(gauge IC start)

・Reset(0x41)

・GG_Charge Control Enable(0x1C)

・CHG_Enable(0x1A)

・Wait for battery inseration…

・Charger_InCtrl_Reg9()：INLIM Setting

・ChargeTermTimer_Reg5()

・Insert Battery

・Reset(0x41)

・GG_Charge Control Enable(0x1C)

・CHG_Enable(0x1A)

----

What is the trigger that starts and clears the counter?

Y.Kuramoto

0 Wyatt Keller over 5 years ago in reply to user6287931

TI__Guru** 105770 points

Hello,

Was the issue with only one test, and it is no longer having this error?

Are you enabling the battery insertion for the gauge to know a new battery has been attached?

Could you clarify the counter you are wondering for when it starts and is cleared?

Sincerely,

Wyatt Keller

0 user6287931 over 5 years ago in reply to Wyatt Keller

Intellectual 350 points

Hello,

>Was the issue with only one test, and it is no longer having this error?

We have confirmed two times.

We think it's not resolved.

>Are you enabling the battery insertion for the gauge to know a new battery has been attached?

The charger will initialize each time the battery is removed

>Could you clarify the counter you are wondering for when it starts and is cleared?

It is counter for CHG_TIMER of Chrgr_TermTimer_Reg5().

(CHRG_FAULT[1:0] = 11 (Charge timer expiration))

What could be the reason why charge timer expiration happens earlier than expected?

When will the timer start?

Could you please help us.

Y.Kuramoto

0 Wyatt Keller over 5 years ago in reply to user6287931

TI__Guru** 105770 points

Hello,

How many times have you performed a test to see the error twice?

Can you outline the tests you are performing when you see the fault?

Try changing the interrupt masks on that register to see if the error is still occurring.

I am asking the firmware team what are the start and stop conditions for the timer.

Sincerely,

Wyatt Keller

0 user6287931 over 5 years ago in reply to Wyatt Keller

Intellectual 350 points

It has been carried out about 30 times, but it has not occurred again.

I think there are some specific steps to reproduce.

>I am asking the firmware team what are the start and stop conditions for the timer.

Could you let me know what is it.

If I want to set 12H charge timer,is it correct attatched parameter?SBC_MBC_2237_gg.gg.csv

0 Wyatt Keller over 5 years ago in reply to user6287931

TI__Guru** 105770 points

Hello,

The conditions to stop and start are sent from the charger, so the gauge will not be responsible for this behavior.

If you are still seeing the error I would put in a question to the charger E2E (link the part for the charger for the post) and see if they can help debug it as well.

To configure for 12hr timer you need to set 0x0A to 0x0C, from the .gg it looks like it is 0x00.

Sincerely,

Wyatt Keller

0 user6287931 over 5 years ago in reply to Wyatt Keller

Intellectual 350 points

Hello

Which parameters did you check?

I think Reg05 is 0x0C so that timer is 12 hours.

※REG[1:2]=10 →12hours

Y.Kuramoto

0 Wyatt Keller over 5 years ago in reply to user6287931

TI__Guru** 105770 points

Hello,

Yes you are correct, I looked at the wrong register when looking for 0x0C configuration.

Sincerely,

Wyatt Keller

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BQ27531-G1: About register Chrgr_TermTimer_Reg5()