Patent ID: 8946931
Filing Date: 2015-02-03
Classification: H02J,H02M

Abstract:
1. A power converter, comprising: a first power input to receive AC input power; a second power input to receive backup power; a first DC bus configured to provide a positive DC output voltage; a second DC bus configured to provide a negative DC output voltage; and a power conversion circuit switchably coupled to the first power input and the second power input, the power conversion circuit operable to generate the positive and negative DC output voltages and configured such that, in a backup mode of operation, the negative DC output voltage is generated using the backup power through a first current path of the power conversion circuit that includes a first diode coupled between the second power input and the second DC bus, and, in a line mode of operation, the negative DC output voltage is generated using the AC input power through a second current path of the power conversion circuit that bypasses the first diode and includes a second diode coupled between the first power input and the second DC bus.