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[General] STMicro driver issue

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manush30

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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: https://www.st.com/content/ccc/reso...df/jcr:content/translations/en.DM00067131.pdf

Thanks you all.
 

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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