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TUSB1046-DCI: DP to USB-C dongle

Laurence Symonds
Intellectual 545 points
Part Number: TUSB1046-DCI
Other Parts Discussed in Thread: TPS65982, TUSB1046EVM, TPS65981, HD3SS460, TPS65981EVM, DP-EXPANSION-EVM

Hi

I want to have a dongle to take the DP source output from a laptop and send it through a USB-C cable to a USB-C only monitor.

Just wanted to confirm that the TUSB1046-DCI could do this.

The application will also need USB2.0 for touch input from the monitor to the laptop.

I've looked through the TUSB1046EVM and it looks almost suitable but it uses the TPS65982, which I would prefer not to use as it is only in BGA package.

Would the TUSB1046-DCI would be able to do this on its own, without any other chips, or would I need to use a USB-C controller such as the TPS65981?

Thanks

  • 0
    TI__Guru** 105055 points

    you need USB-C controller, TUSB1046-DCI can not do this on its own

  • 0 in reply to Brian Zhou
    Intellectual 545 points

    Hi

    Thanks for the reply.

    I have been looking into the different evaluation board example from TI and am a little confused.

    The TUSB1046EVM uses the TUSB1046-DCI and TPS65982 as the PD controller.

    As I said previosuly, I'd prefer to use the TPS65981. The TPS65981EVM board just consists of the TPS65981 and a flash chip. On the DP-EXPANSION-EVM that goes with that, there is just the HD3SS460 mux.

    Both the TUSB1046EVM and the TPS65981EVM with the DP-EXPANSION-EVM show they can perform the task I require.

    So my question is, what is the benefit of using TUSB1046-DCI + TPS65982  versus TPS65981 + HD3SS460?

    Thanks

  • 0 in reply to Laurence Symonds
    TI__Guru*** 140065 points

    Laurence

    For the difference between TPS65981 and TPS65982, please refer to this e2e post: https://e2e.ti.com/support/interface/f/138/p/525452/1911358.

    For the difference between HD3SS460 and TUSB1046:

    HD3SS460 is a Type C Alt Mode Mux only which means it will not compensate for the signal loss from the DP source to the HS3SS460 RX.

    TUSB1046 is a Type C Alt Mode Mux + Linear Re-driver functionality, the RX equalizer of the linear re-driver will compensate for the signal loss between the DP source and the TUSB1046 RX up to 14.4dB at 4.05GHz Nyquist frequency. The RX equalizer in the TUSB1046 is a fixed, not an adaptive equalizer, so you may want to consider:

    a. Place TUSB1046 to the Type C connector as close as possible

    b. Using a captive DP cable and have the TUSB1046 RX equalizer set the equalization to compensate for the loss of the captive DP cable.

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    Intellectual 545 points

    Hi David

    Thanks for your reply. Very heplful information, really appreciate it.

    I think I should be able to go for the combination of TPS65981 & TUSB1046. Having a captive DP cable shouldn't be a problem. Thanks for the advice.

    Thanks