Abstract: A power converter comprising an inverter for receiving a supply power and providing an alternating output. An output rectifier receives the alternating output and provides a rectified output to a load. An output winding receives the rectified output, and a sensing winding is inductively coupled to the output winding and provides a sensing output. A controller receives the sensing output and provides a control signal to the inverter for controlling the alternating output. A related method of converting power is also provided.

Abstract: A power converter comprising an active power factor correction (APFC) circuit. A first compensation circuit provides a first compensation signal to the APFC circuit. A second compensation circuit provides a second compensation signal to the APFC circuit. A load demand sensing circuit receives a load demand signal to switch on the second compensation circuit to provide the second compensation signal. There is also provided a controller for a power converter, with the controller comprising a first compensation circuit for providing a first compensation signal to an active power factor correction (APFC) circuit, and a second compensation circuit for providing a second compensation signal to the APFC circuit. The controller also comprises a load demand sensing circuit for receiving a load demand signal to switch on the second compensation circuit to provide the second compensation signal.

Abstract: A controller for a power converter having at least a first switch and a second switch. Each switch is a transistor with a collector terminal, an emitter terminal, and a base terminal. The controller is connectable to the base terminals of the first and second switches to provide a base current to the base terminals of the first and second switches, and connectable to the emitter terminals of the first and second switches to provide a short-circuit between the base and emitter terminals of the first and second switches. The controller also comprises a timing circuit for controlling the provision of the base current and the short-circuit in a sequence. An associated method is also provided.

Abstract: A controller for a power converter. The power converter comprises an inverter for receiving a supply power and providing an inverter output at an inverter frequency. There is a primary inductance for receiving the inverter output and providing a primary output. There is at least one current sensor for sensing at least one output current and providing at least one output current signal based on the at least one output current. The controller is adapted to receive the at least one output current signal, and control the inverter frequency by providing a switch control signal to the inverter based on the at least one output current signal and a reference signal thereby providing a desired primary output corresponding to the reference signal.

Abstract: A control circuit for a power converter. The power converter comprises a primary circuit for receiving a supply power, with the primary circuit having a primary connection. A secondary circuit provides a load power to a load. The secondary circuit has a secondary connection connected to the primary connection. There is a current sensing circuit for detecting a current sense signal derived from an output current, and a voltage sensing circuit for detecting a voltage sense signal derived from an output voltage. The control circuit comprises a controller for controlling one or more switches in the primary circuit to control the output current and/or the output voltage in accordance with one or more control profiles and based on the current sense signal and/or the voltage sense signal.

Abstract: There is provided a current control circuit for a power converter. The power converter has a primary circuit for receiving a supply current across a first supply rail and a second supply rail. There is a primary connection in the primary circuit. The power converter also has a secondary circuit providing an output current. There is a secondary connection in the secondary circuit. The secondary connection is connected to the primary connection. A controller controls one or more switches in the primary circuit to control the output current. The nature of the power converter is such that it has a reactive circuit which produces a reactive current. The current control circuit comprises a current sensing circuit connected to bypass or cancel the reactive current. The controller is connected to the current sensing circuit and controls the one or more switches based on a signal current sensed by the current sensing circuit.

Abstract: A power converter circuit and an associated method of converting an AC power supply. The power converter circuit comprises: a supply rectifier circuit (2) for rectifying an AC supply power to generate a rectified supply power; an inverter circuit (3) for receiving the rectified supply power to generate an inverted supply power; a load rectifier circuit (4) for rectifying the inverted supply power to generate a rectified load power for supplying a load current to a load (5); and a boost circuit (6) driven by the load current to provide a boosted voltage to the rectified supply power.