TPS65988: TPS65988EVM

Prodigy 210 points

Replies: 12

Views: 123

Part Number: TPS65988

Hi,

I bought a TPS65988EVM recently. In the first time, I used it works. However, it not works in the second time. When I plug in the DC jack or  power supply, it will turn off the power jack automatically. Are they some component short it out? How can I solve the issue?

Best,

Rex

12 Replies

  • Hi Rex,

    Did you happen to change any jumper or switch settings on the EVM board? Also, did you program the board by any chance with another FW configuration? I would recommend reading through the EVM User's Guide to familiarize yourself with the board as well.

    Thank you,

    Hari

  • In reply to Hari Patel1:

    Hi Hari,

    Thanks for the reply. I look through the user's guide already. I did not change any jumper or switch the setting. And I did not program the FW configuration. So, I think it might be the hardware issue. Thank you!

    Best,

    Rex

  • In reply to Rex Li:

    Hi Rex,

    So you are simply connecting the barrel jack connection on the EVM and that's it, nothing else, and then it powered up the first but then when you unplugged it and then plugged in again it didn't turn on the EVM, is that correct? 

    How much power do you barrel jack supply? I believe it only accepts 19V-20V DC supply. Could you measure SYS_PWR (TP5) and P3V3 (TP8)? 

    Also, are you able to negotiate any PD contracts if you connect other devices?

    Thank you,

    Hari

  • In reply to Hari Patel1:

    Hi Hari,

    Yes, it is correct. And It will automatically turn off the power supply. I used Dell laptop power adapter, the model is HA180PM181. It can supply 19.5V/9.2A. It should work with the EVM board. The picture below is the power supply I used.  

    Because when I plug in the power supply, it will turn it off. I can't measure any point of the voltage.

    Thank you,

    Rex

  • In reply to Rex Li:

    Hi Hari,

    Do you know what is the component for Q18 in the TPS65988 EVM board. It is next to the barrel jack. I can not see clear of the component name of it. I think it might be shout out for this particular component. If you can provide the schematic, it will be great. Thank you.

    Best,

    Rex

  • In reply to Rex Li:

    Hi Rex,

    Yes, it seems like a short may have occurred somewhere, I think Q18 may be a FET used in the DC/DC. I will check with my team on this particular component and provide you that schematic tomorrow.

    Thank you,

    Hari

  • In reply to Hari Patel1:

    Hi Hari,

    That will be great. Thank you for the help.

    Best,

    Rex

  • In reply to Hari Patel1:

    Hi Hari,

    Do you get the part number and schematic for the TPS65988 EVM board?

    Thank you,

    Rex

  • In reply to Rex Li:

    Hi Rex,

    The part number is SSM6J507NU,LF for Q18, which looks like is part of the buck converter circuit, you could check the TP7 to see if you are getting any voltage there to debug. 

    TPS65988_Sch.pdf

    Thank you,

    Hari

  • In reply to Hari Patel1:

    Hi Hari,

    The TPS65988 EVM board still not work. Can I exchange a new board? I bought it directly from Ti web. Thanks.

    Best,

    Rex