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EK-TM4C1294XL 5V BoosterPack Powered

Victor L-S
Intellectual 925 points
Other Parts Discussed in Thread: TPS2052B, EK-TM4C1294XL

Hello,

I am planning to supply +5V through the BoosterPack. Actually through the X11 header. Are my assumptions/steps correct?

Move JP1 to position 1-2. 

The power to "U5 TPS73733_DRV_6" will be provided by the BooosterPack +5V.

Since there is no VBUS into "U4 TPS2052B_DRB_8" having +5V presented at its output does no harm. Are there any other precautions needed for this chip?

USB debug. Are there potential problems with having one ground provided through the USB debug connector and another through the BoosterPack?

Thank you for your assistance.

  • 0
    TI__Guru**** 244400 points
    Hello Victor,

    JP1 position 1-2 is for the external 5V supply. However do take care of the following note as given in the schematic for EK-TM4C1294XL

    To power from BoosterPack 5V install jumper on pins 1 - 2 This is also the off position if BoosterPack does not supply power When powered from BoosterPack TPS2052B does not provide current limit protection. When powered by BoosterPack, USB host mode does not supply power to connected devices

    Regards
    Amit
  • 0 in reply to Amit Ashara
    Intellectual 925 points
    Hello Amit,

    I noted that from the documentation. Thank you.

    I have reviewed sheet 5/6 of the schematics. I believe there to be an error with "U4 TPS2052B_DRB_8" in showing *EN1 and *EN2. For this part enables are high as indicated in the part documentation. As shown in the schematic U4 would not turn on when VBUS was present. Can you confirm?

    There remains unresolved the potential ground differences if Debug USB (one ground source) is in use while +5V/GND is supplied from the BoosterPack by an external power supply. Is that a cause for concern?
  • 0 in reply to Victor L-S
    TI__Guru**** 244400 points
    Hello Victor,

    The Debug USb and the +5V/GND are the same.

    Regards
    Amit