• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 62 subscribers
  • Views 124 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.

TPS1H000EVM: Spike on OUT1 while applying power supply

CY Yang1
Prodigy 120 points
Part Number: TPS1H000EVM
Other Parts Discussed in Thread: TPS1H000-Q1

Hello,

            There's a ~110us spike on OUT1 (CH3, no load. probe only) while I turn on supply power on EVM.

       On EVM, only J9/J1/J5/J11/J8 are short, the rest jumpers are left open.

       Is there any way to eliminate this spike on the circuit? 

       

        Thank you!

         CYYang

  • 0
    TI__Mastermind 28215 points

    CYYang,

    Does the voltage eventually taper off to the supply voltage? Also just to make sure I am reading your scope shot correctly, is yellow the supply voltage and purple the output voltage of the TPS1H000-Q1?

    What sort of probe are you using here? Would you be able to take a picture of the EVM setup and post here for reference?

  • 0 in reply to Timothy Logan
    Prodigy 120 points

    Timothy

                 No, the voltage eventually taper off to GND. Yellow on the scope is supply voltage and purple is output voltage.

           The probe is passive probe, Rigol PV2350. EVM setup shows below:

          

             CYYang

  • 0 in reply to CY Yang1
    TI__Mastermind 28215 points

    CYYang,

    This isn't normal behavior and is not being seen on the EVM locally. From the picture it looks like your EVM is in pretty rough shape- would you be able to test it with another, undamaged EVM?