US 11,705,809 B2
Voltage converter
Shohei Hirose, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Jan. 12, 2022, as Appl. No. 17/573,687.
Claims priority of application No. 2021-030843 (JP), filed on Feb. 26, 2021.
Prior Publication US 2022/0278612 A1, Sep. 1, 2022
Int. Cl. H02M 1/00 (2006.01); H02M 3/07 (2006.01); H02M 3/158 (2006.01)
CPC H02M 3/07 (2013.01) [H02M 1/0009 (2021.05); H02M 3/158 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A voltage converter comprising:
a capacitive voltage conversion circuit to receive an input voltage, convert the input voltage into an output voltage, and output the output voltage;
an output capacitor;
an inductor coupled in series between the capacitive voltage conversion circuit and the output capacitor;
a current detector; and
a controller; wherein
the capacitive voltage conversion circuit includes a plurality of switches, at least one flying capacitor, and an intermediate capacitor provided at an output portion;
the current detector is configured to detect a current flowing in the inductor;
the controller is configured or programmed to control the plurality of switches to change between at least two states by comparing the current flowing in the inductor to a threshold current; and
the inductor is coupled in series between the intermediate capacitor and the output capacitor.