Patent ID: 7230838
Filing Date: 2007-06-12
Classification: H02M,H03K

Abstract:
1. A switch mode power supply (SMPS) using an actively controlled damping device for suppressing circuit noise and ringing due to parasitic elements, the SMPS comprising: a first and a second input voltage port for connecting an input voltage to the SMPS; a first and a second output voltage port for connecting a load to a regulated output voltage of the SMPS, wherein an output capacitor is connected between the first and the second output voltage ports; an output inductor, wherein a second side of the output inductor is connected to the first output voltage port; a switch SW, connected from a first side to the first input voltage port and connected from a second side to a first side of the output inductor; a rectifier connected from a first side to the second side of the switch SW and connected from a second side to the second input voltage port and the second output voltage port; and a controllable resistor connected between the first and second sides of switch SW or between the first and second sides of the rectifier, wherein the controllable resistor is controlled such that: