Switched mode power supply and a method for operating a switched mode power supply

摘要

A switched mode power supply provides a reduction of switching losses and increased efficiency. The switched mode power supply includes a first switch coupled to an input terminal configured to receive an input voltage, a second switch, an inductor and an output capacitor. The first switch and the second switch are coupled together at a node, the inductor is coupled between the node and an output terminal, and the output capacitor is coupled to the output terminal. The switched mode power supply further includes a transformer coupled between a control input of the first switch and the node and a pulse generator connected to a control input of the second switch. Further, the transformer includes at most two windings, in particular a primary winding and a secondary winding which are not directly connected to each other.

主权项

1. A switched mode power supply, comprising:
a first switch coupled to an input terminal configured to receive an input voltage, a second switch, an inductor and an output capacitor, wherein the first switch and the second switch are coupled together at a node, the inductor is coupled between the node and an output terminal, and the output capacitor is coupled to the output terminal; a transformer coupled between a control input of the first switch and the node; and a pulse generator connected to a control input of the second switch, wherein the transformer comprises a primary winding and a secondary winding, the switched mode power supply further comprising:
a first capacitor and a second capacitor, wherein the first capacitor is connected between the primary winding and an input node terminal, and the second capacitor is connected between the secondary winding and the input node, andwherein the input node is configured to receive a predetermined potential that is different than the input voltage.