AC/DC converter circuit

摘要

There is disclosed an AC/DC converter circuit. The circuit comprises: an input terminal for receiving an AC supply voltage; a driver circuit adapted to supply a DC drive current or voltage to an output of the circuit based on a signal provided to a control terminal of the driver circuit; and an AC coupling network connected between the input terminal and the control terminal of the driver circuit. The AC coupling network is adapted to derive a signal from an AC supply voltage received by the input terminal and to supply the derived signal to the control terminal of the driver circuit.

主权项

1. An AC/DC converter circuit comprising:
an input terminal for receiving an AC supply voltage; a driver circuit adapted to supply a DC drive current or voltage to an output of the circuit based on a signal provided to a control terminal of the driver circuit; and an AC coupling network connected between the input terminal and the control terminal of the driver circuit, wherein the AC coupling network is adapted to derive a signal from an AC supply voltage received by the input terminal and to supply the derived signal to the control terminal of the driver circuit, and wherein the control terminal of the driver circuit is adapted to control at least one of: a peak inductor current; a switching frequency of the driver circuit; and a pulse interval, wherein the driver circuit comprises a driver integrated circuit and a switch circuit connected between two pins of the driver integrated circuit, and wherein the switch circuit is configured to modulate the peak inductor current and the switching frequency of the driver circuit based on a signal supplied to a base terminal of the switch circuit.