US 12,348,118 B2
Switched mode power supply
Kimmo Koli, Turku (FI); Janne Peltonen, Salo (FI); and Sami Vilhonen, Lieto (FI)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Jul. 7, 2021, as Appl. No. 17/369,272.
Application 17/369,272 is a continuation of application No. 15/795,439, filed on Oct. 27, 2017, granted, now 11,088,619.
Application 15/795,439 is a continuation of application No. 14/916,155, granted, now 9,819,267, issued on Nov. 14, 2017, previously published as PCT/EP2014/068683, filed on Sep. 3, 2014.
Claims priority of application No. 13183040 (EP), filed on Sep. 4, 2013.
Prior Publication US 2021/0376728 A1, Dec. 2, 2021
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2006.01); H02M 1/38 (2007.01); H02M 3/15 (2006.01)
CPC H02M 1/0006 (2021.05) [H02M 1/38 (2013.01); H02M 3/158 (2013.01); H02M 3/1588 (2013.01); H02M 3/15 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A switched mode power supply comprising:
a reactive element comprising a first terminal and a second terminal, the second terminal being configured to provide an output voltage for the switched mode power supply;
a switching stage having first and second inputs, the switching stage being configured to charge and discharge the reactive element, via the first terminal, dependent on first and second control signals applied to the first and second inputs, respectively;
a control signal generator arranged to generate the first and second control signals at the first and second inputs, respectively, via respective first and second control signal paths, wherein the first control signal path is arranged to determine a first drive voltage for application to the first input to the switching stage, dependent on a difference between a first node voltage at a first node, which is coupled to the first control signal path, and a voltage at the first terminal of the reactive element;
a first capacitive element coupled between the first terminal of the reactive element and the first node; and
a voltage regulator coupled to the first node and configured to regulate the first node voltage relative to the voltage at the first terminal of the reactive element.