• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 106 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.

UCC21530-Q1: ucc21530-q1 with Enable PIn shows less voltage?

suresh rajaram
Prodigy 50 points
Part Number: UCC21530-Q1
Other Parts Discussed in Thread: UCC21551

The VCC and the Enable PIN are provided with 5v. Please find the picture below. Why the enable pin shows less voltage of around 2.6V? Is there any reason for this?

Please find the picture.

  • 0
    TI__Genius 15856 points

    Hi Suresh,

    EN is supposed to be a high-Z input. Is the device damaged? Maybe see if replacing the device fixes the problem. A damaged ESD diode could draw excessive current and cause 2.4V drop across the 50m resistor. Is this resistor 50 milliOhms or Mega ohms? Maybe short it out it the latter.

    Also, please use the updated version, the UCC21551. It is a much improved device.

    Best regards,

    Sean