Power factor corrector circuit in interrupted conduction mode and continuous conduction mode

Abstract

Embodiments of a method and a device are disclosed. A circuit can include a power factor corrector, wherein two or more desired input variables can be defined for the power factor corrector, and a processor that communicates with the power factor corrector, and which selects variables in the power factor corrector with respect to the two or more desired input variables defined for the power factorcorrector. The two or more desired input variables can include a switching frequency and an input current and the variables can include an amount of operation in a conduction mode and at least one ofa primary peak current and a primary conduction interval. The variables in the power factor corrector can be adapted to the two or more desired input variables to allow the power factor corrector tooperate in an operating mode that can include the conduction mode.

Description

technical field [0001] Involves power factor corrector circuits with discontinuous conduction mode and continuous conduction mode based on desired switching frequency and input current Background technique [0002] Common alternating current (AC) power ("mains power or mains electricity") may need to be converted to direct current (DC) power for use by various consumer devices. Power management systems can use components with very low losses in terms of power dissipation such as inductors, diodes, capacitors, transformers, and other switches (e.g., Junction Gate Field Effect Transistors, Metal Oxide Semiconductor Field Effect Transistors, etc.) The AC power of the mains power supply is converted into DC power. Mains losses can be reduced by paying attention to the harmonics of the current drawn from the mains and the phase relationship between the mains voltage and the current drawn from the mains. The power factor of an AC to DC power system can be defined as the differen...

AI Technical Summary

Problems solved by technology

To date, the CCM method and the DCM method have not been combined in a way that allows the power factor corrector to operate DCM and CCM during the mains half cycle

Also, loop gain and dynamic behavior are different in CCM applications and DCM applications in power factor correctors, which makes it more complicated to define closed loops and obtain dynamic performance

Another issue with power factor correctors is related to potential instability that can occur for duty cycles greater than 50% in CCM (e.g. short long periods)

Additionally, operating frequency in BCM can result in an undesirably large frequency during a portion of the mains half cycle

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