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Thread: using only two leg of CIPOS IGCM20F60GA

  1. #1
    New Member New Member AndreaC is on a distinguished road
    Join Date
    Apr 2019

    using only two leg of CIPOS IGCM20F60GA

    Hello All,

    I'm using IGCM20F60GA to drive a three phase motor.

    It is working very well.

    Now I'm trying to use the CIPOS as two leg full bridge.

    In order to spin the dc motor in one direction I keep phase V high in full conduction.
    and I modulate phase U low.

    It is possible for the power module to work like this?

    I suspect we can have some problem with bootstrap circuit.

    Can anyone help me to understand why this configuration is not working?

  2. #2
    Infineon Employee
    Infineon Employee
    Srivatsa is on a distinguished road
    Join Date
    Apr 2018

    We see no issue in using only two legs of the IGCM20F60GA. What is the switching frequency / duty cycle and the bootstrap capacitor value? Make sure there is sufficient time to charge the bootstrap capacitor or use lower values. Also look at any undervoltage conditions.
    The under-voltage detection operates with a rising supply threshold of typical VBSUV+ = 12.1V and a falling threshold of VBSUV- = 10.4V.

    Best regards,

    More information can be found under
    Please contact our Technical Assistance Center for further inquiries

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