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UCC2818A: Questions about operation

Masazumi Ishii
Genius 3945 points
Part Number: UCC2818A

Hello.

I made a 1200W power supply using UCC2818A.
We conducted tests to confirm the performance of this power supply. Noise tests were performed.
UCC2818A stopped its operation.
At this time, VREF pin = 0 V.
It will not recover unless the power is turned on again.
question
Q1
Why did the operation stop?　
Is there a protection function?

Q2
Is there a possibility of latch up?

thank　you.

  • 0
    TI__Mastermind 34465 points
    Hello,
    Can you please explain the noise tests that you performed ?
    Vref should never go to 0V unless there is some severe overload in your system.
    You should look to see which pin of the UCC2818A is exceeding its absolute maximum ratings.
    If this is the case then the ic will most likely be damaged and will not always recover.
    Regards
    John