BQ35100: What is the current consumption of internal temperature sensor of BQ35100?

user5874521

Intellectual 450 points

Part Number: BQ35100

In the spec, do ACC current 130uA include the current consumption of internal temperature sensor?

What is current consumption of internal temperature sensor when it is working?

over 5 years ago

0 Andy Liu (BMS) over 5 years ago

TI__Guru 52115 points

I will check internally and get back to you.

0 user5874521 over 5 years ago in reply to Andy Liu (BMS)

Intellectual 450 points

Hi Andy,

I set BQ35100 to ACC mode, the current consumption is about 160uA. Higher than Icc_Accu(130uA) about 30uA

I want to confirm where the 30uA come from. In the spec, Icc_Accu's typical value is 130uA, what is the normal range? Such as 120uA to 140uA? Do 160uA meet spec?

0 user5874521 over 5 years ago in reply to Andy Liu (BMS)

Intellectual 450 points

0 Andy Liu (BMS) over 5 years ago

TI__Guru 52115 points

The 130uA number includes the current consumption of internal temperature sensor.

Also , this number is a a typical value and we don't have a min/max for it.

0 user5874521 over 5 years ago in reply to Andy Liu (BMS)

Intellectual 450 points

Hi Andy,

For our product is powered by non-rechargeable battery. The power consumption is very vertical.

Where do you get the value 130uA. Is 130uA a measured value or a calculated value? Can it high to 200uA or 300, 400uA?

It runs FW. So 130uA is measured in which version of FW?

0 Kang Kang over 5 years ago in reply to user5874521

TI__Mastermind 24870 points

Hello User,

It is tough to put the max spec for this device as it runs FW that may or may not do flash writes.

0 user5874521 over 5 years ago in reply to Kang Kang

Intellectual 450 points

Could you provide the FW that can work in 130uA in ACC mode? Or how to set BQ35100 not do flash writes?

We only use the initial FW in BQ35100 but do not do any modification.

0 Kang Kang over 5 years ago in reply to user5874521

TI__Mastermind 24870 points

That is the FW you have.

You can refer to the TRM for flash update ok voltage section for the second question.

0 user5874521 over 5 years ago in reply to Kang Kang

Intellectual 450 points

In our test, I set GE to high, than reset BQ35100.I think in this case, BQ35100 is in ACC mode.

I can't find a way to set GMSEL. How to set GMSEL directly?

How do TI get 130uA? Just pulling high GE, than set GMESEL1,0= 0,0 than GaugeStart()?

0 Kang Kang over 5 years ago in reply to user5874521

TI__Mastermind 24870 points

user,

I suggest you really search or read through the technical reference manual. The questions you ask are all in there.

Here is what I did, a simple search for GMSEL and I found on page 11 of the TRM where this bit is located.

For 130 uA, I'm closing this thread out, you can find the response in multiple threads above.

0 user5874521 over 5 years ago in reply to Kang Kang

Intellectual 450 points

Thank your for your reply. Page 11 is only for calibration mode. And I can't find the register address of GMSEL in TRM or any other documents.

What's more, Please help to review the question in https://e2e.ti.com/support/power-management/f/196/t/868019. Thank you!

0 Andy Liu (BMS) over 5 years ago in reply to user5874521

TI__Guru 52115 points

See Page 20 of BQ35100 TRM.

Andy

Power management

Power management forum

BQ35100: What is the current consumption of internal temperature sensor of BQ35100?