Driver arrangement including power factor correction circuitry
AssigneeSignify Holding B.V.
InventorsZhiquan Chen, Jie Fu, Yu Wang, Gang Wang
Life of this patent
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Abstract
A mechanism for controlling a supply voltage for a switched-mode power supply designed for compensating an AC mains power ripple in a PFC output signal produced by a power factor converter. An adjustment circuit is used to synchronize the amplitude of the supply voltage with the amplitude of an offset signal generated by the switched-mode power supply used to compensate for the AC mains power ripple in the PFC output signal. Said synchronizing regulates the difference between the voltage amplitude of the adjusted supply voltage and the voltage amplitude of the offset signal, thereby controlling the power loss of the switched-mode power supply.
Claims15
A driver arrangement comprising a power factor (PFC) converter comprising:
- a first input interface configured to receive an AC mains power;
- a PFC conversion circuitry configured to perform power factor correction on the AC mains power and generate a PFC output signal having a ripple corresponding to a ripple of the AC mains power;
- and
- a first output interface configured to provide the PFC output signal;
- a power supply for providing a supply voltage from the AC mains power;
- and
- a switched-mode power supply arrangement comprising:
- a second input interface coupled to the power supply and configured to receive the supply voltage from the power supply;
- a second output interface electrically connected in series with the first output interface;
- and
- a switched-mode power supply configured to convert the supply voltage into an offset signal provided to the second output interface, the offset signal being configured to superimpose the PFC output signal, to produce a superimposed signal, and compensate for the ripple corresponding to the AC mains power;
- and
- an adjustment circuit electrically coupled between the power supply and the second input interface, and configured to adjust the supply voltage provided to the second input interface to be in-synchronization with the offset signal so as to regulate the difference between the voltage amplitude of the adjusted supply voltage and the voltage amplitude of the offset signal.
Dependencies are inferred from the claim text.