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Thread: Drop-in alternative to TC4428A?

  1. #1
    New Member New Member Sharmalee is on a distinguished road
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    Drop-in alternative to TC4428A?

    Hi,
    Can you please advise if there is a drop-in alternative from Infineon to Microchip TC4428A?
    IRS4428S is not suitable:
    The propagation delay is 50ns typ and 95ns max (compared with 30ns typ and 35ns max).
    Customer is using 1 driver per power MOSFET in a full bridge application and the deadtime between high-side and low-side power MOSFET can be as low as 30ns. This implies propagation delay variation between two drivers could result in longer than expected dead time (reduced efficiency) or in the other direction shoot through (both high-side and low-side MOSFETs on at the same time). Said another way they are not worried about the 50ns delay time but the variation of this number between parts (variation needs to be much less than 30ns).

    There doesn't appear to be a drop-in from the newer Infineon parts.
    Trying to use either the 2EDN7523 or 2EDN7524 and make use of the Enable pin to create an inv / non-inv part looks like it will require PCB changes, and the customer uses the TC4428A on multiple projects.

    Would be good to hear if you know of any way to implement this without PCB changes.

    Thanks,
    Sharmalee

  2. #2
    Intermediate Intermediate
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    Infineon Employee
    Abhilash P is on a distinguished road
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    Hi,

    As per the datasheet of the 2EDN7523/524, the ENA and ENB pins can be enabled by keeping it open. Hence as per the pin configurations, the pin 1 of TC4428A can be overlapped with ENA and similarly with ENB.

    The possible replacements for TC4428A can be the following,

    2EDN7523
    2EDN7524
    2EDN852X
    2EDN7424

    Regards,
    Abhilash P
    The views expressed here are my personal opinions, have not been reviewed or authorized by Infineon and do not necessarily represent the views of Infineon.

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