US 11,722,070 B2
Alternating current to direct current conversion circuit
Wei Chen, Zhejiang (CN); and Chen Zhao, Zhejiang (CN)
Assigned to SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD, Zhejiang (CN)
Filed by SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD, Zhejiang (CN)
Filed on Dec. 16, 2021, as Appl. No. 17/552,905.
Claims priority of application No. 202011483022.X (CN), filed on Dec. 16, 2020.
Prior Publication US 2022/0190738 A1, Jun. 16, 2022
Int. Cl. H02M 7/49 (2007.01); H02M 7/217 (2006.01); H02M 7/12 (2006.01); H02M 1/00 (2006.01); H02M 1/14 (2006.01); H02M 1/42 (2007.01); H02M 3/07 (2006.01)
CPC H02M 7/12 (2013.01) [H02M 1/007 (2021.05); H02M 1/143 (2013.01); H02M 1/4233 (2013.01); H02M 3/07 (2013.01); H02M 7/2176 (2013.01); H02M 7/49 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An alternating current (AC) to direct current (DC) conversion circuit, comprising:
a rectifier circuit, a first direct current to direct current (DC to DC) conversion module and a second DC to DC conversion module; wherein,
the rectifier circuit is configured to receive an AC input voltage, convert the AC input voltage into a DC input voltage, and output the converted DC input voltage;
an input end of the first DC to DC conversion module is coupled to an output end of the rectifier circuit, an output end of the first DC to DC conversion module is coupled to an input end of the second DC to DC conversion module, and the first DC to DC conversion module is configured to perform power factor correction, so that a waveform of an input current of the first DC to DC conversion module corresponds to a waveform of the DC input voltage, wherein the first DC to DC conversion module comprises N first power converters each comprising an input end, and input ends of the N first power converters are connected in series to receive the DC input voltage, to reduce a voltage across each power switch in the first DC to DC conversion module, wherein N is a positive integer; and
an output end of the second DC to DC conversion module is coupled to a load, and the second DC to DC conversion module is configured to convert a signal outputted by the first DC to DC conversion module into a first output signal, to drive the load, wherein the input ends of the N first power converters are connected in series between a high potential input terminal of the first DC to DC conversion module and a ground, the N first power converters each comprise an output end, and output ends of the N first power converters serve as N output ends of the first DC to DC conversion module correspondingly.