TPS25751 / TPS25763

Hello,

Norbert Erhart said:

1. If only USB-Data is transfered to the Monitor and back (The monitor is equipped with additional USB-Hub-controller) the TPS25751 would be the best choice - can you confirm?

No.  The TPS25751 does not support USB3 data.  The connection manager status is not available.

Norbert Erhart said:

3. Is there a possibility to update the firmware of the TPS257xx in the field (be end customer) via USB, or would I have to add a MCU connected to USB which  updates the TPS257xx over I2C?

You would need to use an MCU to update the TPS25751 over I2C.

I will ask my colleague to comment on the TPS25763-Q1

Regards,
Chris

Hello Chris, hello Eric,

according to the datasheet the TPS25751-D is Power Role: DRP, Sink and Data Role: DFP, DRD, DRP so according to my understanding it should be possible to use the TPS25751-D in the following application:

Therefore I don't understand what you mean saying: "The connection manager status is not available"

BTW: Up to now I was using the TPS65987, but unfortunately it is no longer recommended for new designs.

Looking forward to your Feedback.

Best Regards

Norbert

Hello Chris,

O.K. I understand even if I don't need the alternate mode and USB 3, only the TPS25751 is not suitable for the application shown in my last block-diagram. Is there any substitute you could recommend?

According to TI's overview there will be the TPS26744E-Q1, soon: As far as I understand this PD-controller would provide the features of the TPS65987 (of course amon others) - Right? Currently the status is marked with "Preview", when is it expected to be available?

Back to TPS65987: It is not EOL yet, but how long will it still be available?

Thank you

Regards

Norbert

Norbert,

The TPS65987 will not EOL.  We highlight the NRND because we will not make any updates to this device to support updates/changes to the USBC-PD specification.  This device will continue in production for customers already using this design.  You are still free to select/use this device but be advised of the customer responsibility to adhere to the USBC-PD spec.

I will defer to Eric to comment on the Q1 device.

Regards,
Chris

Hello Chris,

I would like to get back to your answer below: "No.  The TPS25751 does not support USB3 data.  The connection manager status is not available."

I checked again the datasheet  and on page-47 and page-48 it seems like the the connection manager is available. In addition I checked the "Advanced Configuration" in the "USBCPD Application Customization Tool" and in the section "IO Config" you can select "plugevent_port1" and "cable_orientation_event_port1". Therefore I don't understand why there shouldn't be a connection manager. 

If I'm right, could I use the TPS25751 for the application I described (see block-diagram) at the beginning of this thread?

Thank you very much

Regards

Norbert

Hello,

Norbert Erhart said:

If I'm right, could I use the TPS25751 for the application I described (see block-diagram) at the beginning of this thread?

You are correct and I was mistaken.  The TPS25751 does support USB3 data.

Regards,
Chris

Hi Chris,

sorry to bother you again. Regarding the application, shown in the diagram above, do you see any problems regarding the power-switching (DRP) 5V/3A to 20V/5A?

Thank you

Norbert

Hello,

No bother.  The TPS25751 will not have issue with the power role swap.  Please be advised that the device is configured in the context of a battery charging system and is pre-loaded with I2C events to configure the charger (BQ device) when transitioning to battery charging to OTG (sourcing).

You can also choose to not have a battery charger implementation you would just need to manage the sink and sourcing of power on the other side of the TPS25751.  I hope that is clear.

Regards,
Chris

Hello,

Please see also this reference.

https://www.ti.com/tool/PMP41062

https://www.ti.com/lit/ug/tidt349a/tidt349a.pdf

Regards,
Chris

Hello Chris,

thanks a lot for your answer and links. As shown in the initial block-diagram I would like to use the TPS25751 in a monitor which either sinks 5V/3A from a notebook, or - as soon as the monitor is supplied externally - it should act as a source and charge the notebook (up to 20V/5A). The power-role swaps must be seamless in order not to interrupt the USB connection. As far as I can see in the schematics of the evaluation board (PMP41062) the setup in the diagram below should be posssible.

If this is not possible, do you have any reference designs for a seamless power role swap?

Thank you

Norbert