TPS542941: About VIN shutdown current

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Part Number: TPS542941

Hi Team,

Our customer measured VIN1 and VIN2 shutdown current at VIN1=VIN2=12V, EN1=EN2=LOW.

Then, VIN1 current is around 110uA and VIN2 current is around 0uA.

So, VIN current is inclined to VIN1 pin.

Is this correct behavior?

If yes, could you please let us know this cause?

Regards,

Kanemaru

Genius 9530 points

Jason Wang (BSR-MV)
- Sep 21, 2018 1:10 AM
Hi,

Please refer dagtasheet page 6, as below:

VREG5 (internal circuit power supply) is from VIN1.

Dataheet page 3, EC table, VIN shutdown current, max 150uA, so your test result is reasonable.

Jason Wang

APP/BSR/MV
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- Sep 21, 2018 4:13 AM
In reply to Jason Wang (BSR-MV):

Hi Jason-san,

Thank you for your prompt reply.

I understand. Thank you very much.

Regards,

Kanemaru
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- Sep 25, 2018 10:17 AM
In reply to Hide:

Hi Jason-san,

I have one more question.

Our customer separate VIN1 (So VIN1=Open and VIN2=12V) at shutdown.

Because, they would like to reduce shutdown current.

Do you have any problems with this usage?

Regards,

Kanemaru
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Jason Wang (BSR-MV)
- Sep 26, 2018 4:49 AM
In reply to Hide:

Kanemaru,
I think the structure is acceptable and no problem.
But, please send email to SamZhang for EVM test confirm. sam.zhang@ti.com

Jason Wang

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- Sep 26, 2018 5:43 AM
In reply to Jason Wang (BSR-MV):

Hi Jason-san,

Thank you for your prompt reply.

I send e-mail to Sam Zhang-san.

I’d greatly appreciate your verification.

Regards,

Kanemaru
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Guru 18780 points

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- Sep 26, 2018 6:08 AM
In reply to Hide:

Hi Jason-san,

I received automatic replay from Zhang-san.

Could you plaease let us know your address?

Regards,

Kanemaru
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Jason Wang (BSR-MV)
- Sep 28, 2018 3:11 AM
In reply to Hide:

Hi,
Hao will give you feedback today.

Jason Wang

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Sam(MPAA) Zhang
- Sep 28, 2018 6:13 AM
In reply to Hide:

Hi Kanemaru,

I've checked your application on EVM. There is no issue.

When VIN1=0, VIN2=7.2V, EN1=EN2=0, there is no voltage on either output, nor the other VIN.

Regards,

Sam
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- Sep 28, 2018 11:14 AM
In reply to Sam(MPAA) Zhang:

Hi Sam-san,

Thank you for the information.

I understand. Thank you very much.

Regards,

Kanemaru
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TPS542941: About VIN shutdown current

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