Help: Rt8249c

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  • dhan
    Senior Member
    • Jun 2018
    • 132
    • hp
    #1

    Help: Rt8249c

    Hello, I wonder how EN1 and EN2 will be turn ON, I have 3.3V on LD03, which is always ON.
    but I don't have LD05 5V.
    as the datasheet says, LD05 will turn on if there is 3.3V on EN1 or EN2,
    Phase 1 and Phase 2 voltage is also not present.

    the laptop takes 22mA only.

    could be the chip is faulty?

    Thank You
    Attached Files
    Tags: None
    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india
      #2
      Re: Help: Rt8249c

      5V LDO will be generated when EN1 is high. EN1 is enabled by EC_ON signal from kbc.

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