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Original question:

UCC24624: FOR LLC CONVERTER WITH 400V OUTPUT

UCC24624: UCC24624 as synchronous rectifier controller with 48V output

Suraj Sharma
Prodigy 50 points
Part Number: UCC24624

Tool/software:

Hello

I have an LLC DC-DC design with output voltage at 48V and I need to add synchronous rectification controller at the seconder side. I found UCC24624 IC and seems like ok for my design.However as mentioned in the datasheet the VD1 and VD2 pins of UCC24624 can handle up to 230V.If I use center tapped transformer the voltage at each output side will be 48V.

So will the UCC24624  be fine for this design?

  • 0
    TI__Guru* 81146 points

    Hello,

    Your inquiry is under review and I will get back to you shortly.

    Regards,

  • 0 in reply to Mike O'
    TI__Guru* 81146 points

    Hello,

    In this application the UCC24624 should work.  The maximum voltage across VD1 and VD2 should be 96 V.  So the absolute maximum rating should not be exceeded.

    Just to make sure it is a good idea to use an RC snubber across the SRs to snub and dampen ringing caused by leakage inductance.  This will dampen ringing and protect the UCC24624 from possible over voltage and reduce EMI.

    In your design it is important to evaluate the electrical stress of all components to make sure the absolute maximum ratings will not be exceeded.  

    Thank you for interest in Texas Instruments (TI) products.  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.

    Regards,