• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 2 answers
  • Subscribers 34 subscribers
  • Views 409 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS65987D: Can I use two TPS65987D to replace TPS65983B in reference design TIDA-03027

Victor Chen_HK
Expert 5130 points
Part Number: TPS65987D
Other Parts Discussed in Thread: TPS65983B

Hello,

My customer wants to use 2 pcs of TPS65987D to replace the TPS65983B in reference design TIDA-03027 with the updated block diagram as following:

Q1: TPS65983B use UART interface to share firmware between 2 devices. Does it work using I2C between 2 TPS65987D?

Q2.Tpye A port is not needed. So customer can eliminate USB billboard, right?

Q3,Q4, One HDMI 2.0 port is needed and the typc-C port will also be used to transmit video signal. What is the correct configuration of the SS MUX and TX/RX pairs?

Best regards,

Victor

  • 0
    TI__Mastermind 36756 points

    Hi Victor,

    Yes, it is possible to use the 87D instead of the 83B. However, a few things will need to be considered.

    Q1, UART boot to share FW is not supported with 87D, each 87D will need to have its own SPI Flash.

    Q2, Billboard is still required for a PD device, this can be handled by the USB Hub.

    Q3, If both the HDMI port and downstream Type-C port will need to support video then an MST hub is required on the design. TI does not have an MST hub solution so another chip will be needed for that requirement. Additionally, an alternate mode mux will be needed on the downstream Type-C port, the TUSB1046A can be used there. 

    Thank you,
    Eric

  • 0 in reply to Eric Beljaars
    Prodigy 10 points

    Hi Eric,

    Thanks for your answer.

    1> Regarding Q2 question, if it no need charging device (provide power), the left hand side 87D chip is no needed? or right hand side? Or it must need 2 pcs 87D for each USB Type-C?

    2> The existing TIDA-03027 solution can be achieved below function? Except USB Type-A 3.0 socket, no component can delete,right? It can full power to charge the MAC book pro by 87W charger?

    Thanks & Regards,

    Matthew

  • 0 in reply to Matthew Wong2
    TI__Mastermind 36756 points

    Hi Matthew,

    1. If you want to support video on both Type-C ports then a PD controller is required, the 87D is a good fit for both ports.

    2. That is correct, the downstream Type-C is only capable of providing 5V/1.5A max to power flash drives or small accessories. This is because the notebook connected will provide 5V/3A to the adapter and the remaining power is needed for powering the adapter chips.

    Thank you,
    Eric