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Thread: Half-Bridge Galvanically-Isolated in Low Voltage, Low Power Application?

  1. #1
    Beginner Beginner boom is on a distinguished road
    Join Date
    Sep 2020

    Half-Bridge Galvanically-Isolated in Low Voltage, Low Power Application?

    Can a half-bridge configuration, such as the following, be an efficient solution for the following requirement?

    - Galvanic isolation between input and output
    - Input: 12-24V DC
    - Output: 5V DC @ 2A

    What about SR losses? According to Infineon's chart, below, SR losses would exceed diode losses at our desired output. Is there a way to mitigate that, or an alternate topology?

    From Infineon Video

    Click image for larger version

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    Click image for larger version

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    Last edited by boom; Oct 22nd, 2020 at 08:15 AM.

  2. #2
    Beginner Beginner
    Infineon Employee
    Infineon Employee
    Abhilash P is on a distinguished road
    Join Date
    Dec 2020
    Bangalore, India

    As per the required power specification, a Flyback topology is well preferred. It has less component count compared to half bridge and it is easy to control.

    Please find the attached image with different DC-DC topologies, their specifications and its applications.

    Click image for larger version

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    Please revert back if you need any help in selecting the right switch and the package.

    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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