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TPS50601ASPEVM-S: What is the reason you have added D3 to the design from pins (11-15) to GND?

Neli08
Prodigy 190 points
Part Number: TPS50601ASPEVM-S

  • +1
    TI__Genius 14540 points

    Hi,

    D3 is a Schottky diode placed across the switching node to ground.  Although not required it is nice to have in the design as the diode reverse recovery loss is superior in the external Shottky diode compared to the body diode of the integrated low side FET.   With this, a slight improvement in efficiency can be realized with improved charge recovery.  Figure 5 of this app note touches on this subject a bit.

     

    http://www.ti.com/lit/an/slpa009a/slpa009a.pdf

    Thanks

    Christian