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LM5127-Q1: Power up again before fully discharged

Peter Xu

Expert 6255 points

Part Number: LM5127-Q1

Hi team,

When we use LM5127, keep it running and open BATT, quickly power on again before the 3.3V power of SW3 fully discharged. Will there be some unknown problems(voltage unstable, breakdown) in LM5127?

Regards,

Peter

over 2 years ago

0 Harry Hofner over 2 years ago

TI__Mastermind 19715 points

Hello Peter,

Thanks for reaching out to us via e2e.

I am sorry the information that you provide is not enough that I could understand the concept of the application.
Can you please provide more details, e.g. a block diagram with all voltages and how the converters are connected etc.

Best regards

Harry

0 Peter Xu over 2 years ago in reply to Harry Hofner

TI__Expert 6255 points

Hi Harry,

Their schematic is shown below. I will give detailed info later.

Regards,

Peter

0 Peter Xu over 2 years ago in reply to Peter Xu

TI__Expert 6255 points

Hi Harry,

Please see their detailed schematic.

Regards,

Peter

0 Harry Hofner over 2 years ago in reply to Peter Xu

TI__Mastermind 19715 points

Hello Peter,

Thanks for providing the schematics.

Still, I am not certain how to deal with it.
Can you please try to re-phrase the actual question?

Thanks a lot,

Harry

0 Peter Xu over 2 years ago in reply to Harry Hofner

TI__Expert 6255 points

Hi Harry,

Discussed with my customer, they just tested some fault on our LDO and worried that 5127 would have same problem.

I see the schematic and believe there is nothing wrong.

Regards,

Peter

+1 Harry Hofner over 2 years ago in reply to Peter Xu

TI__Mastermind 19715 points

Hello Peter,

Thanks for the update.

Please let me know if we shall still verify something on our side.

Thanks a lot,

Harry