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LMG5200: Avoiding Overshoot

Part Number: LMG5200

Are the complementary outputs of a typical comparator sufficient to avoid overshoot when connected to HI and LI,    Or is a more elaborate scheme necessary to guarantee that both are not driven high at the same time?

Regards

Andy

  • Andy,

    Thanks for inquiring about LMG5200. My recommendation is to design in the dead-time, whether via a logic circuit or in firmware if using a micro-controller that drives HI and LI independently. The dead time necessary to avoid a shoot-through condition will vary based on SW node slew rate and VIN bus voltage, so it is best to optimize this parameter on a case-by-case basis.

    A sample dead-time generation circuit is shown in the user's guide for the LMG5200EVM-02 evaluation module.

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    - Daniel