Thank you for your immediate response,
I use UCC3626. My engine has Hall sensors 120 °, two quadrant.
I believe that the problem is the management of the IR2110 in HO out that despite the bootstrap capacitor and a charge pump system, made with a 7 kHz oscillator, does not change status than its LIN. After turning on the circuit by increasing the voltage PWM you see out I always high and just moving the motor shaft that starts regularly. The current consumption is minimal and it seems to run very well. thanks Luciano