HD3SS3220: HD3SS3220

Hi David, 

Thank you for reply. Yes I need PD controller which support power role swap. I am not sure but this PD should communicate with HD3SS3220? I've attached the diagram from HD3SS3220 datasheet. At the top, there is USB VBUS switch. This one should be PD with power role swap I think. am I right?

Image link: https://ibb.co/9GPSM4z

Best regards

Hi,

Can you please insert the image within this thread?

For PD controller, please take a look at our TPS6598x family of devices which already include a USB VBUS switch. 

But if you are using a PD controller, then you will use HD3SS3212 passive MUX only, not HD3SS3220.

Thanks

David

Hi David,

I've attached the image. In this image, Is VBUS switch will do what I need? Let me explain what I need. I am trying to design USB hub. This USB hub will be supplied by upstream device. This upstream device will be a tablet. what I want is when the tablet battery become low, external power supply will supply power to system and charge the tablet battery. that's why I am looking for USB PD with power role swap. But I need to combine it with HD3SS3220. 

Dear David,

But I need to work with HD3SS3220, Can I use the TPS65987 with HD3SS3220? because you said;

David (ASIC) Liu said:

But if you are using a PD controller, then you will use HD3SS3212 passive MUX only, not HD3SS3220.

Hi,

You can't as the PD controller will replace the function of the CC controller within the HD3SS3220.

Thanks

David

Dear David,

Okay I got another question. If I design the circuit with HD3SS3212 and TPS65987, will the system have ability to transfer data and charge the upstream device battery at the same time?

Best regards

Hi,

Yes, with USB Type-C, the data role and the power role are separate. So for example, you can be a data sink (device) and a power source, or be a data source (host) and a power sink. The TPS65987 can support both data and power role swap, so you can change the role when there is a need.

Is this a USB3.2 5G or 10G application? HD3SS3212 is a passive MUX and does not provide signal integrity compensation. If you need signal integrity compensation plus MUX functionality, please take a look at TUSB542 (5G) or TUSB1142 (10G) solutions as well. 

Thanks

David

Dear David,

It is USB 3.2 5G application, It is an 4 PORT USB HUB. So TUSB542 and TPS65987 combination should be taken into account I think.

Best regards

Hi,

Your understanding is correct, I can help reviewing your schematic once it is finished.

Thanks

David

Dear David,

Thank you for your all efforts. Once I finished I'll share the schematics with you. 

Best regards