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WEBENCH® Tools/UCC27324: quarries about the IC schematic

Part Number: UCC27324
Other Parts Discussed in Thread: UCC27322,

Tool/software: WEBENCH® Design Tools

Dear supporting team,

can i use UCC27324 IC as a gate driver to my project instead of UCC27322. If not,Please give me the differences between these two ICs. is their any way to get 9A peak current from UCC27324 design by adding circuitry at outside of the IC.

  • Harijarani,

    The UCC27322 is a single 9-A driver, whereas the UCC27324 is a dual driver, both inside the same package, each rated to 4-A peak.

    The peak current rating of the driver relates to the Rds(on) rating of the internal drive FETs - lower Rds(on) can drive higher peak current, which in turn leads to faster turn-on and turn-off of the external power MOSFET.

    For the UCC27324, it might be possible to parallel the two channels to drive a single MOSFET, to get higher drive capability. But I am not 100% sure if this is ok to do, I will get someone from the driver team to respond to you.

    However, I don't see any advantage of using UCC27324 with both channels paralleded, it would be better to use the UCC27322, if very high peak drive current is required.

    What external MOSFET is being used? What is the total gate charge? Why is 9-A peak required?


    Thanks,
    Bernard