TPS65400: TPS65400 and EVM software communication problems

Hi Ruby!

  Thanks for replying.

I performed the both suggested answers, and the GUI still does not show the proper values on turn on sequence, and the expected voltage outputs on SW1 through SW 4 (see below).

  The GUI is acting as if program is not properly communicating with my PCB despite my board having the correct SW1 through SW4 voltage configuration and software interface.  Can you please double check my 

TPS65400RGZR design (pdf enclosed)?Main_Board_PG2.pdf

Thanks

Art

Hi Ruby!

  For some reason, the first picture did not transfer correct on my last message.  Here it is (expected voltage outputs on SW1 through SW 4:

Thanks

Art

Let me try this one more time:

Hi Art

To get the correct output: Please change the resistive divider as is highlighted in the picture below.

To get the correct the sequence: Please make sure to ignore the enable pins in GUI, as is highlighted in the picture below. 

If there is any question, please let me know. Thanks for your feed back.

BR 

Ruby

Hi Ruby!

  Thank you for your help.

I was finally able to get the voltage values and the voltage sequencing to work with the GUI.  I do have one more question.  In case there is a need to program a part for power up/power down sequence on a board only.  What are the minimum connections needed on the TPS65400 without using a USB2ANY full connector?

Thanks

Art

Good morning Ruby!

  Perfect!

So, as long as pins:18, 19, 20, 21, 23,and 39 are properly connected on the PCB, then USB2ANY connections to TPS65400 are only pins 38, 42, and 43, and maybe a ground pin, correct?

I'm in the process of optimizing the USB2ANY connections to the our development board while being able to program power supply sequencing.

Thanks

Art

Thanks

Art

Hi Art,

Ruby will feedback to you after CNY vacation.

Hi Art

Thanks for your feedback. Yes, you should connect pins 38, 42, and 43, and a ground pin. 

BR

Ruby