TPS2811 does not work with +12V

Hi

I'm developping a Brushless Controller. Recently I had some trouble with my MOSFET Drivers. So I changed to the TPS2811P. The problem is now, that they don't want to work with more than 8.9V. With 8V they turn the MOSFETs on and off very well, but if I turn the voltage above 9V they just stop switching.

Does anyone know this problem and know what to do?

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