Relating to Power Adaptors
AssigneeHOLDIP Limited
InventorsDavid Thomas Summerland, Charles Pollock, Helen Pollock
Life of this patent
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Abstract
A power adaptor (20) is provided, comprising an input (22) for connection to an AC power supply, and a resonant circuit (34) coupled to the input (22) that provides an output suitable for driving a load (50). The capacitance and inductance of the resonant circuit (34) are selected to provide a pre-determined change in effective voltage, and a corresponding pre-determined change in effective current, between the input (22) and the output (24) of the power adaptor (20).
Claims13
1-34. (canceled)
A power adaptor for one or more solid state light sources comprising an input for connection to an AC power supply, and an LCL series-parallel resonant circuit coupled to the input that provides an output suitable for driving the one or more solid state light sources, wherein the lighting unit includes a controller and electronic switches for driving the resonant circuit, the controller being adapted to use on-time modulation of the switches to determine the waveform of the current drawn from the input by the resonant circuit.
Dependencies are inferred from the claim text.