Patent ID: 9024593
Filing Date: 2015-05-05
Classification: H02M

Abstract:
1. A power supply unit comprising: a boost-converter having an input node and an output node; the output node being coupled to a high-side of an H-bridge for supplying power to a capacitive load that is coupled to a first node and to a second node of the H-bridge; wherein a first diode is coupled in forward direction between the first node of the H-bridge and the input node of the boost-converter and wherein a second diode is coupled in forward direction between the second node of the H-bridge and the input node of the boost-converter; further comprising a first switch and a second switch, wherein the first switch is coupled between a power input node of the power supply unit and the first node of the H-bridge and the second switch is coupled between the power input node of the power supply unit and the second node of the H-bridge.