The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 2017
Filed:
May. 15, 2014
Telefonaktiebolaget L M Ericsson (Publ), Stockholm, SE;
Magnus Karlsson, Oskarshamn, SE;
Oscar Persson, Kalmar, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A switched mode power supply comprises a switched mode converter () and a controller for controlling the switched mode converter, wherein the switched mode converter is provided for converting an input voltage (V) to an output voltage (V) and includes, on a primary side, a primary winding (X) and a controllable switch based circuitry () connecting the input voltage over the primary winding; and, on a secondary side, a secondary winding (X) coupled to the primary winding, and a capacitive element (C) connected over the secondary winding, wherein the output voltage is obtained as the voltage over the capacitive element. The primary winding comprises a first winding portion (n) and at least one further winding portion (n); and the switch based circuitry comprises controllable switches (Q, Q, Q, Q, Q, Q) capable of switching between a first operation state wherein the input voltage is connected only over the first winding portion and at least a second operation state wherein the input voltage is connected over the first and the at least one further winding portions, thereby enabling switching between two different transformer ratios (n, n).