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  1. #1
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    STMicro driver issue

    Hello friends,

    I have a problem and working on it a few days.
    I have L6482H STMicro driver for pumping charge.

    I work with two modes, Pressure and Vacuum.

    When i go to pressure everything work fine, but when i do the vacuum i get THERMAL shutdown.
    When i read the status register i get "11"(device shutdown, pg 58-59 in the datasheet).
    There is no high temperature in the machine and i don't know why it is shutting down itself.
    i will more
    The circuit attached.

    Driver datasheet: http://www.st.com/content/ccc/resour...DM00067131.pdf

    Thanks you all.

    •   Alt11th January 2017, 12:24

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  2. #2
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    Re: STMicro driver issue

    You should know how you are controlling the stepper motor differently in both modes. We can't.

    A possible reason for device overheating might be an inappropriate high PWM frequency in combination with a high MOSFET gate capacitance.



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