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TIDA-00917: boot strap rather than dc/dc

Nicholas Carley
Genius 10455 points
Part Number: TIDA-00917


Looking at the nice IGBT gate driver you implemented in TIDA-00917 I think it will be too expensive having 4 dc dc converters to supply gate drive voltages. Is there a way to implement it using bootstrap capacitors and still get the -8v gate drive?

  • 0
    TI__Expert 4135 points

    Hi Nicholas,

    A single flyback converter with multiple output windings similar to  TIDA-00199 or TIDA-010006 can be used for generating the gate drive voltages.

    For higher power output motor drive inverters like TIDA-00917 it is better to use multiple isolated rails rather than using bootstrap for layout, routing and system wiring reasons. Compared to the IGBTs, the additional cost of the flyback will be minimal for higher power levels.

    Regards,

    Pawan