Abstract: A terminal connector for attachment to a circuit board. The terminal connector comprises first and second terminals, each comprising a connection end for connection to respective contacts in the circuit board and a wire attachment formation for connecting a wire to the respective terminal. The terminal connector further comprises a ferrite core surrounding a section of both the first and second terminals between their terminal contacts and wire attachment formations. The ferrite core is directly connected to the terminals and is secured to the circuit board by the terminals when their connection ends are connected to the respective contacts in the circuit board.

Abstract: An apparatus (21) is described for facilitating emulated current-mode control of a resonant converter (1). The apparatus (21) comprises: an input (21) a for a first signal suitable for use in determining a phase of a resonant current, wherein the resonant current corresponds to a current in a resonant network (3) of the converter (1); an input (21b) for a second signal suitable for use in determining a target phase difference between the resonant current and a driving voltage, wherein the driving voltage corresponds to a voltage provided by a switch network (2) of the converter (1) to the resonant network (3); one or more outputs (21c, 21d) for one or more control signals for controlling operation of the switch network (2); and circuitry (21e-i).

Abstract: A SEPIC-type voltage converter for converting an input voltage supplied by a power supply into an output voltage comprises an inductive component comprising primary and secondary windings, an output capacitor for delivering power to a load by way of an output node, an AC coupling capacitor, a first rectifier for rectifying the output voltage, and a switch for periodically switching between an ON state in which the primary winding is energized by the power supply and in which the secondary winding is energized by the coupling capacitor, and an OFF state in which the output capacitor is charged by both the primary winding and the secondary winding. A second rectifier is connected in series with the secondary winding and the secondary winding is inductively coupled to the primary winding such that the secondary winding is influenced by changes in the voltage applied across the primary winding by the power supply.

Abstract: Disclosed is a PFC (power factor correction) device for shaping an input current of a power converter. The device includes means for receiving a rectified input voltage derived from an AC input voltage; load determining means for determining a load value L which represents the power drawn by a load supplied by the power converter; current shaping means for shaping the input current of the power converter to follow a reference waveform; and control means for controlling the current shaping means to operate over a conduction interval ? during each positive and negative half cycle of the AC input voltage. The duration of the conduction interval is controlled in accordance with the load value L. The current shaping means may shape the input current to follow the reference waveform which crosses zero at phase angles which substantially correspond to the start and end of the conduction interval.

Abstract: Load sharing apparatus for load sharing between a plurality of power supplies (1, 2). The apparatus comprises one or more load sharing modules (Share1, Share2), each for association with a respective power supply. The or each load sharing module comprises load determining means for generating a signal which represents a load value corresponding to the power or current supplied by the respective power supply, and voltage control means for controlling the output voltage of the respective power supply to vary inversely with said load value at a first rate when the load value is below a threshold value, and for controlling the output voltage of the respective power supply to vary inversely with said load value at a second rate when the load value equals or exceeds said (first) threshold value. Said second rate is greater than said first rate.