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PMP3162: Some design question for PMP3162..

Peter Tseng
Genius 5770 points
Part Number: PMP3162
Other Parts Discussed in Thread: UCC2897A

Dear Sir,

Based on the schematics, there are gate drivers on board.(U1/U3/U4)!

Are they necessary?

What is the influence if no use them? Performance? 

Thanks.

  • 0
    TI__Intellectual 2825 points

    Hi Peter,

    U3 can be eliminated, as the UCC2897A is capable of driving the primary FETs.  Only be careful that the UCC2897A is not too far away from the FETs in the layout.

    U1 and U4 are needed.  These two drivers buffer the synchronous rectifier FETs from the secondary windings, and provide strong drive signals for the synchronous rectifier FETs.

    thank you,

    Brian