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Thread: Is the TLE7182E gate driver compatible with the AUIRF7739L2TR DirectFET ?

  1. #1
    New Member New Member johndsd is on a distinguished road
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    Is the TLE7182E gate driver compatible with the AUIRF7739L2TR DirectFET ?

    I plan to use the TLE7182E gate driver to drive a full H-bridge using AUIRF7739L2TR DirectFETs.

    The supply voltage will be 13.8V and the switching frequency will be 25kHz.

    Will this gate driver be able to drive these DirectFETs ?

    I have been reading various application notes to determine the power requirements for a gate driver but its confusing.

    Things I am unsure of are:

    1 - What is the voltage of the TLE7182E gate driver outputs ? Will this be the supply voltage i.e. 13.8V ?
    2 - The AUIRF7739L2TR data sheet has two values for Gate-to-Source charge, Qgs1 (46nC) and Qgs2 (19nC). Whats the difference and which value should I use ?
    3 - What is the maximum output current of the TLE7182E gate driver outputs, I cannot seem to find this value in the datasheet ?

  2. #2
    Administrator Huixian is on a distinguished road
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    You could use TLE7182E to drive AUIRF7739L2TR DirectFET.
    The output volage of TLE7182E gate driver should be almost the same or a Little bit less than the supply voltage. (VS - I * Rdson)
    As can be seen in the data sheet page8 there are 2 sources. You should use the sum of these 2 values Qgs=Qgs1+Qgs2.
    The maximum ouput current is not given in the data sheet, however it should not be more than the supply current, which states in data sheet page8 45mA.

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