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Original question:

LM25118EVAL: Radiated noise of LM25118EVAL

LM25118EVAL: LM25118EVAL: Radiated noise of LM25118EVAL This is a related question.

user6144845
Prodigy 160 points
Part Number: LM25118EVAL

user6144845
LM25118EVAL: Radiated noise of LM25118EVAL

This is a related question.

Hello.

Although the noise due to the snubber could be reduced, the output voltage fluctuates when the input voltage is set to 30V or higher.
There is a voltage drop of VCC.
As I announced in the previous question, a snubber circuit (10Ω + 2000p) is inserted between GATE and SGND of Q1-Q2 of FET.
Please comment on the insertion location and constants .

  • 0
    TI__Mastermind 26620 points

    Hello,

    The waveforms do not look like the design is operating correctly.  Can you please post the schematic you are testing?  Also please state the input and output voltage setting and what load level you are seeing the issue at?    

    I have also reassigned this thread to the correct team supporting this device.

    Thanks.

    David.

  • 0 in reply to David Baba
    TI__Mastermind 26620 points

    Hello,

    A number of days have past and I have not received a response.  I will assume the issue has been resolved, if you still have an issue please feel free to reopen thread.

    Thanks.

    David.