Alternating current to direct current conversion circuit
AssigneeSilergy Semiconductor Technology (Hangzhou) LTD
InventorsWei CHEN, Chen ZHAO
Life of this patent
Estimating the term…
Abstract
An alternating current to direct current conversion circuit includes N first power converters instead of a boost circuit including a power switch with a high withstand voltage. The N first power converters each have an input end and theses input ends are connected in series, to perform power factor correction. Therefore, the alternating current to direct current conversion circuit includes no power switch with a high withstand voltage, so that the alternating current to direct current conversion circuit has a small volume, low switching loss, less energy loss, and good heat dissipation, thereby increasing power density.
Claims19
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, wherein 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.
Dependencies are inferred from the claim text.