Patent ID: 7253592
Filing Date: 2007-08-07
Classification: H02M

Abstract:
1. A DC voltage converter, comprising: an energy store coupled to an input and configured to supply a DC voltage; a first output configured to provide a first output voltage; a second output configured to provide a second output voltage; a first switch configured to selectively couple the energy store to the first output, the first switch comprising a first field effect transistor; a second switch configured to selectively couple the energy store to the second output, the second switch comprising a second field effect transistor; a further switch coupled to the energy store; and a control unit configured to receive signals at the first and second outputs, and coupled to the first switch, the second switch, and the further switch; wherein the second field effect transistor comprises a substrate terminal coupled to the control unit, and wherein the control unit is configured to provide a substrate potential to the substrate terminal that is dependent on an operating mode of the DC voltage converter.