US 9,425,684 B2 · Reduced noise power converter using novel shield

Abstract

Power converters that produce less noise are disclosed. For example, in an embodiment, power converter can include a first inductor magnetically coupled to a second inductor, wherein a first end of the second inductor is electrically open and a second end of the second inductor is electrically coupled to ground via a second capacitor, a transistor electrically connected to the first inductor, and control circuitry to control switching of the transistor, wherein when the transistor is repeatedly switched on and off by the control circuitry, a current loop is formed through the transistor, the second capacitor, the first inductor and the second inductor, the current loop causing a reduced amount of switching noise to be generated by the power converter.

Claims17

Dependent claims

A power converter, comprising:

a first inductor having a first end and a second end, the first inductor being electrically connected to a direct-voltage power source at the first end, and electrically connected to a first power lead of a transistor and an anode of a diode at the second end;
a first capacitor having a first end and a second end, the first capacitor being electrically coupled to the direct-voltage power source at the first end of the first capacitor, and electrically coupled to a cathode of the diode at the second end the first capacitor;
a second inductor having a first end and a second end and magnetically coupled to the first inductor, wherein the first end of the second inductor is electrically open and the second end of the second inductor is electrically coupled to ground via a second capacitor;
and
control circuitry to control switching of the transistor.

2 more elements

Dependencies are inferred from the claim text.

Reduced noise power converter using novel shield

Life of this patent

Reduced noise power converter using novel shield

Life of this patent

Abstract

Claims17