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TDA4VH EVB doesn't work

fengwei liu
Prodigy 90 points

Other Parts Discussed in Thread: TDA4VH

hi experts，

     My TDA4VH EVB doesn't work，Input  voltages is 30V，current 5A。 but the leds of power status with MCU DOMAIN and MAIN DOMAIN are off

     LD7   ON

     LD8   OFF

     LD9   OFF

                     

     and i find that both of mcu and main  domain  will be power down when pmic detects error，but i have checked  all the power supply are OK，so why my EVB doesn't work

     can you give me some suggestioin? 

  • 0
    TI__Guru 54675 points

    Regarding the input voltage - what is the voltage on the board (location TP31)?  (At higher current levels you can have substantial voltage drops across the cable).

    Regarding the input current - is that supply's current limit or the actual current the supply is generating?  (The board should NOT be pulling 5A at 30V)

    You mention "when PMCI detects error".  Can you please provide more information on how/why you believe PMIC is detecting error?

    You mention "checked all power supply are OK", which supplies are you referring?  MCU and MAIN domain supplies are OFF, thus all supplies are NOT ok.