TPS65987D: PIN no.25 (PP_CABLE) supply voltage; 5V or 3.3V

Joshua Kim

Part Number: TPS65987D

Dear Eric,

I noticed that the pin 25 (PP_CABLE) connects not 5V but 3.3V in the TPS65987-90EVM, while the datasheet says it is the 5V input. Does it work with 3.3V?

Thanks again,

over 6 years ago

0 Eric Beljaars over 6 years ago

TI__Mastermind 36756 points

Hi Jeong,

It is recommended to attach 5V to the PP_Cable pin. This Pin is the supply for VCONN. VCONN would provide power to e-marked Type-C cables. Some e-marked cables are able to operate from 3.3V, but all can operate from 5V.

If this answers your question, PLEASE select This resolved my issue

Thank you,
Eric

0 Joshua Kim over 6 years ago in reply to Eric Beljaars

Intellectual 590 points

Dear Eric,

Thanks for the answer.
Would you explain why the TPS65987-90EVM uses not 5V but 3.3V for the pin PP_Cable?

Thanks again,
Jeong Hyeon Kim

0 Eric Beljaars over 6 years ago in reply to Joshua Kim

TI__Mastermind 36756 points

Hi Jeong,

On the TPS65987-90EVM it was used since the 3.3V rail was readily available on the board. That's the only reason. 5V is the recommended voltage for the PP_Cable pin.

If this answers your question, PLEASE select This resolved my issue

Thank you,
Eric

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TPS65987D: PIN no.25 (PP_CABLE) supply voltage; 5V or 3.3V