TPS65988: TPS65988EVM

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

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

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

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

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

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

Hi Hari,

That will be great. Thank you for the help.

Best,

Rex

Hi Hari,

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

Thank you,

Rex

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

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

Hi Rex,

I would recommend contacting customer service directly regarding an exchange and they will be able to better assist you. You will see options to open a support request, chat or call the support team there.

Here is the link: 

Thank you,

Hari

Hi Hari,

I did contact the costumer service, but they need the technical specialist talk with them and do the exchange or return process. If you can do that , it will be great. I appreciate that. Thank you!

Best,

Rex 

Hi Rex,

I will have to look into this. I will be out of office until next week so there may be delays.

Thank you,

Hari

Hi Hari,

Do you have any update for the replacement board? Because the customer said they need you to confirm the replacement statues to continues the process. Thank you!

Best,

Rex 

Hi Rex,

Hari is currently out of the office and will follow up with you next week when he returns. Thank you for your patience.

Thanks,

Emma

Hi Hari,

I still did not receive any info regarding to the replace board. If you have some info for that, it will be great. Thanks.

Best,

Rex