• State TI Thinks Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 3 answers
  • Subscribers 62 subscribers
  • Views 115 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

Original question:

TPS65987EVM: Powering up the EVM with 12V

TPS65987EVM: Powering up the EVM with 12V supply on SYS_PWR

Shwetanshu Singh
Prodigy 170 points

Part Number: TPS65987EVM

Hi,

I am trying to power up the TPS65987EVM using 12V external supply on SYS_PWR. Can you please tell me the connections required and the changes required on the GUI?


Thanks

  • 0
    TI__Mastermind 26126 points

    Hi Shwetanshu, 

    If you haven't already I recommend watching the tutorial series on how to use the EVM and the GUI tool to configure the PD controller (linked below). You can download the GUI directly through here: https://www.ti.com/tool/TPS6598X-CONFIG 

    EVM Tutorial: https://www.ti.com/video/6139824207001 

    GUI Tutorial: https://www.ti.com/video/6122862051001 

    Thanks and Regards,
    Raymond Lin

  • 0 in reply to Raymond Lin
    Prodigy 170 points

    Hi Raymond,

    Thank you for your reply.

    I have already watched the tutorials. However, they only talk about using the EVM by providing power using the 20V barrel jack connector, and not using the SYS_PWR. I want to know the connections required for supplying 12V using SYS_PWR. 
    Is connecting a wire to pin 1 of J4 or J5 sufficient? Also, for using the EVM as a source to charge a PD device, connection to which of the two, J4 or J5 is recommended?

    Thanks,
    Shwetanshu

  • 0 in reply to Shwetanshu Singh
    TI__Mastermind 26126 points

    HI Shwetanshu, 

    In order to enable the EVM by connecting to SYS_PWR, we recommend using 20V power supply since the buck converter on the EVM will not enable with 12V (refer to schematic on page 12 of datasheet). 

    TPS65987D has two internal high voltage power path (PP_HV1 and PP_HV2). Depending which one you configured as source or sink (this will need to be done via GUI), you'll need to adjust the jumpers on J4 or J5. For example, if PP_HV1 is configured to be the source power path, then you'll need to use the jumper to connect pins 2 and 3 (PP_HV1 to VAR_DCDC) on J4. You can then use J5 to connect SYS_PWR to the external power supply (make sure PP_HV2 is configured to be sink and the jumper connects PP_HV2 to SYS_PWR). 

    For easier setup, I recommend using a Dell Barrel Jack to supply power to the EVM.

    Thanks and Regards,

    Raymond Lin

  • 0 in reply to Raymond Lin
    Prodigy 170 points

    Hi Raymond, 

    Thanks for the explanation. 

    I have some further queries. 

    I am using the board in its default setup (PPHV1 as sink path (J4) and PPHV2 as source path (J5)). Jumpers are connected to pins 2 & 3 on J5; and pins 1&2 on J4.

    My understanding till now was that the power would have to be connected to pin 1 of either J5 or J4. But that does not seem to be the case. Please guide as to where exactly to connect the power supply.

    Thanks

  • 0 in reply to Shwetanshu Singh
    TI__Mastermind 26126 points

    Hi Shwetanshu, 

    You should be able to connect the power supply to the power path that is tied to the sink path (J4 in this case). As long as SYS_PWR is connected to power supply (where Barrel Jack supplies power to), you should be able to power on EVM by using jumpers. SYS_PWR is connected to VAR_DCDC which is the output side of the DCDC for source path. 

    Thanks and Regards,
    Raymond Lin