Dimmer for resistive or capacitive loads
AssigneeSTMicroelectronics S.r.l.
InventorsLaurent Gonthier, Raynald Achart
Life of this patent
Estimating the term…
Abstract
A power dimmer for an A.C. load comprising, between two terminals, two one-way switches connected in anti-parallel and controllable to be turned off and turned on, each switch being controlled by a driver circuit setting the turn-off times of each of the switches with respect to a reference value, each driver circuit being associated with a supply circuit comprising a voltage storage element in series with a one-way rectifying element, all in parallel with a voltage-limiting element, the two supply circuits being connected to each other by a capacitor and the respective supply voltages of the driver circuits being sampled across the respective capacitors of each supply circuit.
Claims8
A power dimmer for an A.C. load comprising, between two terminals, two one-way switches connected in anti-parallel and controllable to the off and on states, each switch being controlled by a driver circuit setting the turn-off times of each of the switches with respect to a reference value, wherein each driver circuit is associated with a supply circuit comprising:
- a voltage storage element;
- a diode in series with said storage element;
- a voltage-limiting element in parallel with the serial connection of said storage element and said diode, the two supply circuits being connected to each other by a capacitor and the respective supply voltages of the driver circuits being provided across the respective capacitors of each supply circuit.
Dependencies are inferred from the claim text.