TPS62085: Fail to build up voltage when setting load to CC at 2A

Edward Lee

Intellectual 1655 points

Part Number: TPS62085

Hi Team,

My customer uses Chroma 6312 series E-load to test the TPS62085 EVM.

The configuration is listed below.

Vin=3V

Vout=1.2V

When setting E-load to CC mode at 2A, TPS62085 failed to build up the output voltage during booting on.

But if adding E-load after booting on, the output voltage is normal.

It's kind of you to look into this problem for us.

Thanks

Sincerely,

Edward

over 4 years ago

0 Excel Regidor over 4 years ago

TI__Mastermind 26856 points

Hi Edward,

Can you share the schematic diagram? If it is confidential, search my name (Excel Regidor) in TI so you can send it thru my email.

In parallel, can ask customer to measure the current going to the E-load at startup and send the waveform to us?

Best regards,

Excel

0 Edward Lee over 4 years ago in reply to Excel Regidor

TI__Intellectual 1655 points

Hi Excel,

My customer used the EVM to test.

And the schematic is the same as the link below.

http://www.ti.com/lit/ug/slvu809/slvu809.pdf

Sure, in the meanwhile I can try to get the current waveform from them too.

Thanks for your help

Sincerely,

Edward

0 Excel Regidor over 4 years ago in reply to Edward Lee

TI__Mastermind 26856 points

Hi Edward,

Any update on the current waveform at startup?

Best regards,

Excel

0 Edward Lee over 4 years ago in reply to Excel Regidor

TI__Intellectual 1655 points

Hi Excel,

Thanks for tracking the status.

I am still waiting for the feedback from my customer.

Will keep you posted.

Sincerely,

Edward

0 Excel Regidor over 4 years ago in reply to Edward Lee

TI__Mastermind 26856 points

Hi Edward,

If no customer feedback yet, I will close this thread. You can send me an email in TI once you get the info from customer.

Best regards,

Excel Regidor

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TPS62085: Fail to build up voltage when setting load to CC at 2A