A method for driving a load by using an output stage amplifier in full bridge configuration whose supply is modulated by means of a fast switching power converter, controlled in order to maintain the stage's output common mode at its minimum voltage, is presented. The modulation of the switching power converter output is obtained by a feedback control system regulating directly the voltage of the bridge output stage terminals. This bridge unipolar class H stage allows driving the load with high accuracy and improved efficiency without introducing switching noise and EMI at the load terminals typical of PWM driving. This method can be applied with the same benefits to class AB, pseudo class AB or to class A output stages. When this method is associated with an imposed current driving approach and with a current oversampling digital to analog converter the resulting advantages are very significant for accurate motor control applications.