USB-PD-CHG-EVM-01: PP5V connection for sink-only design

SmartEnrg

Part Number: USB-PD-CHG-EVM-01
Other Parts Discussed in Thread: TPS25750, BQ25792

Hi,

If I am not planning to supply/ source 5V back to VBUS, what's the best way to connect pins 34,35 (PP5V) and 32,33 (VBUS)?

Guess I could leave 32,33 unconnected(?), but what about 34,35? - TPS25750 DS says they "supply for CCy pins as VCONN"
Can I use a nominal (LDO fed) 5V supply as PP5V - just so CC lines can function properly? If so, how much current should be
provisioned?

Also, will it be possible for TI team member to do a review of my design schematic privately and provide feedback please?

Please advise. Thanks for your timely attention and help.

over 3 years ago

0 Tommy Lin over 3 years ago

TI__Mastermind 32280 points

Hi,

Our team member will get back to you as soon as possible.

Regards.

0 SmartEnrg over 3 years ago in reply to Tommy Lin

Expert 1165 points

Hi Tommy,

It's been a while - any update on my request? Help Please!!

0 Chuck Branch over 3 years ago in reply to SmartEnrg

TI__Mastermind 32891 points

If you are only planning to Sink power, then you should follow the connectivity shown in this application FAQ:

https://e2e.ti.com/support/interface-group/interface/f/interface-forum/988215/faq-tps25750-how-do-i-create-a-sink-only-usb-c-pd-port-to-replace-a-legacy-barrel-jack-connector

0 SmartEnrg over 3 years ago in reply to Chuck Branch

Expert 1165 points

Thanks Chuck,
Your reference to the FAQ seem to resolve my first question.
For the second request - would you or someone from your team help me with private review of my custom design involving TPS25750D and BQ25792?
Please advise.

0 Chuck Branch over 3 years ago in reply to SmartEnrg

TI__Mastermind 32891 points

It is easiest if you have an FAE who can submit it in our internal system.

If not, then you can send a friend request and we can use private messenger. This will make this review difficult because you will have to do the 750 and the 792 as sepearte reviews instead of us passing it around internally.

Regards,

Chuck

Power management

Power management forum

USB-PD-CHG-EVM-01: PP5V connection for sink-only design