US 11,671,009 B2
Switching converter for converting a DC input voltage into a DC output voltage
Edoardo Botti, Vigevano (IT)
Assigned to STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed by STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed on May 6, 2021, as Appl. No. 17/313,505.
Claims priority of application No. 102020000015232 (IT), filed on Jun. 24, 2020.
Prior Publication US 2021/0408903 A1, Dec. 30, 2021
Int. Cl. H02M 3/158 (2006.01); H02M 3/155 (2006.01); H03F 3/217 (2006.01); H04R 3/04 (2006.01)
CPC H02M 3/155 (2013.01) [H03F 3/217 (2013.01); H04R 3/04 (2013.01); H03F 2200/03 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A switching converter for converting a direct current (DC) input voltage into a DC output voltage, the switching converter comprising:
first and second Zeta converters having respective output terminals configured to be connected across a load, each the first and second Zeta converters comprising:
an output stage configured to provide a respective output voltage to the load;
a first switching stage configured to be switched between a first state in which the input voltage is allowed to be provided to an input stage, and a second state in which the input voltage is prevented from being provided to the input stage;
a second switching stage configured to be switched between the first state in which a reference voltage is allowed to be provided to the output stage, and the second state in which the reference voltage is prevented from being provided to the output stage; and
the input stage, configured to receive the input voltage and comprising an input inductor having a first terminal electrically coupled to the first switching stage;
wherein the input inductors of the input stages of the first and second Zeta converters are magnetically coupled to each other such that in response to current entering the first terminal of the input inductor of the first Zeta converter that is coupled to the first switching stage of the first Zeta converter, a voltage induced by the current is positive at the first terminal of the input inductor of the second Zeta converter that is coupled to the first switching stage of the second Zeta converter.