• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 2 answers
  • Subscribers 63 subscribers
  • Views 224 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

UCC28951-Q1: UCC28951-Q1

Rajashekar Koutla
Intellectual 590 points
Part Number: UCC28951-Q1

Hello Sir

Can you explain how to test a four pin mosfet (like part no C3M0065100K) with the help of Digital multimeter ?

In what cases ,the mosfet may get damage or pins get shorted ?

Thanks and regards

Rajashekar

  • 0
    TI__Mastermind 25570 points

    Hello Rajashekar

    I'm afraid that I cannot answer questions related to another company's product. You should contact Cree support to get a definitive answer to your question.

    Regards

    Colin

  • 0 in reply to Colin Gillmor
    Intellectual 590 points

    Thanks for reply Colin.

    Can you explain me in general that how to test a mosfet whether it got damaged or working properly with the help of Digital multimeter ?

    and in which cases that the mosfet may damage or pins get shorted ?

    Thanks and regards

    Rajashekar.

  • 0 in reply to Rajashekar Koutla
    TI__Mastermind 25570 points
    Hi Rajashekar

    In general - First, short gate to source together - to remove gate charge
    Measure resistance Drain to Source and then Source to Drain - you should see O/C in one direction and a Diode in the other.
    O/C the gate
    While on resistance range put positive lead of DVM onto the gate and negative onto Source (assuming Nch) - also do not assume that the black lead of the DVM is negative and red is positive !.
    This should charge the gate to above its threshold.
    Don't touch the gate - yet
    Measure drain to source resistance in the 'non diode' direction - the gate charge should partially turn on the MOSFET so the Rds_on will be less than before.
    While measuring Rds, connect the gate to the source using your finger (I'm assuming low voltages here of course <10V) and watch Rds increase as the gate charge leaks away.

    That's about as much as you can do with a DVM.

    Regards
    Colin