TPS54625: TPS54625PWP: can TPS54625PWP sink current?

Andrew Xiang

Part Number: TPS54625

I want to put current through a TEC module, I have TPS54625PWP set a 5.5V, and I will have a 8Vdc flow current through the TEC toward its 5.5Vdc output. Will TPS54625PWP function sinking current?

thanks

over 1 year ago

0 Andrew Xiang over 1 year ago

Prodigy 130 points

Also, what is the output behavior when EN is disabled. Will output act as ground that can sink current? or disconnected?

0 Miranda Gu over 1 year ago in reply to Andrew Xiang

TI__Genius 15397 points

Hi Andrew,

Sorry I'm not clear your question.

Where is your TEC module? Input side? Where voltage is 8Vdc? You can draw a diagram to explain your question, thank you!

0 Andrew Xiang over 1 year ago in reply to Miranda Gu

Prodigy 130 points

Treat TEC as a 2 ohm power resistor. 8V from a buck-boost converter. I want to verify if TPS54625PWP can sink current in general. My specific case is not important.

0 Miranda Gu over 1 year ago in reply to Andrew Xiang

TI__Genius 15397 points

Hi Andrew,

Without the diagram, I still don't understand your meaning of 'sink current'.

Please describe more about your question, thanks.

0 Andrew Xiang over 1 year ago in reply to Miranda Gu

Prodigy 130 points

source sink and sink current. Please google.

0 Miranda Gu over 1 year ago in reply to Andrew Xiang

TI__Genius 15397 points

Hi Andrew,

I know the meaning of 'sink', what I don't know is your sink current flow, from Vout to Vin? Or other pins sink current to ground?

Your clear question is necessary for us to debug. Appreciate your understanding, thank you.

0 Andrew Xiang over 1 year ago in reply to Miranda Gu

Prodigy 130 points

Can Vout of TPS54625PWP act as current sink?

I thought my question is very clear. Which part don't you understand?

0 Miranda Gu over 1 year ago in reply to Andrew Xiang

TI__Genius 15397 points

Hi Andrew,

I will assign my colleague, technical expert Yuchang to support your case.

0 Yuchang Zhang over 1 year ago in reply to Andrew Xiang

TI__Mastermind 18510 points

Hi, please correct me if my understanding is not correct, you used 54625 output 5.5V, and another power source 8V to 5.5V for TEC current requirement, and that may cause 54625 sink current, right?

54625 should support sink current due to it works FCCM mode.

What's sink current requirement for your application?

For discharge, you may read 11.5 at page7 in datasheet.

Yuchang

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TPS54625: TPS54625PWP: can TPS54625PWP sink current?