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Original question:

AM62A7-Q1: VBUS voltage range

AM62A7-Q1: Adverse effects in the case of unexpected VBUS

KenF
Expert 7150 points
Part Number: AM62A7-Q1

Hello Sreenivasa

You mentioned "The input could be 1.6V (1/3 * 4.75) to 1.73V (1/3 * 5.2)". My customer asks following three questions.

(1) What happens (adverse effects) if VBUS is open when they use it as device?

(2) What happens (adverse effects) if VBUS is less than 1.6V when they use it as device?

(3) What happens (adverse effects) if VBUS is more than 1.73V when they use it as device?

Best regards,
Ken

  • +1
    TI__Guru**** 191939 points

    Hello Ken,

    Thank you for the query.

    KenF said:
    (1) What happens (adverse effects) if VBUS is open when they use it as device?

    (2) What happens (adverse effects) if VBUS is less than 1.6V when they use it as device?

    The USB interface may not function below the recommended VBUS voltage of 1.6V - this is USB spec requirement.

    KenF said:
    (3) What happens (adverse effects) if VBUS is more than 1.73V when they use it as device?

    I would expect the USB to function normal, If the VBUS supply is withing the ROC and above the comparator threshold. (divided USBx_VBUS  value equivalent to 4.75V)

    Regards,

    Sreenivasa