TPS65988DK: Two Port USB C Power Delivery - Power Pass Through

Brianna Tynen

Part Number: TPS65988DK
Other Parts Discussed in Thread: TPS65988, TPS65988DJEVM, TPS65988DJ

I'm designing a docking station/hub that has one USB Type C port with 100W Power Delivery (PD) set up as a sink, and another Type C port with PD set up as a source and also requires USB 2.0 Upstream Facing Port data capability. Essentially, I need to be able to do power pass through and USB 2.0.

It looks like the TPS65988DK will be able to do the whole job of the power delivery and I can add an additional USB2 Hub Controller (TUSB2046IBVF) for the USB 2.0 hub control. It looks like the software can be preconfigured in TI's configuration tool and loaded onto an EEPROM. Am I correct in understanding that the TPS65988DK does NOT require external HOST controller (i.e. a microprocessor)?

over 2 years ago

0 Tommy Lin over 2 years ago

TI__Mastermind 31660 points

Hi,

TPS65988DK does not support power pass through, however you can use GPIO event to achieve similar result.

TPS65988DK does not handle USB2.0 data so the D+/D- line of the port will be directly connected to hub.

If the natively supported functionalities of TPS65988DK is enough for your application and you do not need to change settings on the fly you do not need a external host controller.

I would recommend looking into the device datasheet and technical reference manual for more information.

Regards

0 Brianna Tynen over 2 years ago

Prodigy 20 points

Is there an IC that does support pass through? Or does it pretty much always require a small micro processor to support it?

+1 Tommy Lin over 2 years ago in reply to Brianna Tynen

TI__Mastermind 31660 points

Hi,

We do not have IC that support pass through.

However, you can setup a GPIO that goes high when a contract established on the sink port, feed that GPIO to another GPIO that will load a config for the source port to simulate the pass through function.

You can refer to the TPS65988 TRM GPIO Events for more information.

Regards

+1 Brianna Tynen over 2 years ago in reply to Tommy Lin

Prodigy 20 points

Ok. Thanks Tommy. That seems like it will work well for what I'm looking at doing without having to use a microprocessor.
One more question.
I'm also looking at the TPS65988 vs. TPS65988DJ vs. TPS65988DK.. I want to get the eval board to start working on configuring the device to do what I need it to do, but the TPS65988DJEVM is the only one available right now. The TPS65988DJEVM will work for me, right?

+1 Tommy Lin over 2 years ago in reply to Brianna Tynen

TI__Mastermind 31660 points

Hi,

Since you are only using USB2.0 speed, the DJEVM should work fine here.

Regards

0 Brianna Tynen over 2 years ago in reply to Tommy Lin

Prodigy 20 points

Great. Thanks!

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TPS65988DK: Two Port USB C Power Delivery - Power Pass Through