Circuit to keep electronic transformers working while under-loaded

摘要

An LED light source includes a sub-circuit (24) that is connectable via terminals (12,13) to an electronic transformer and to a powered circuit including at least one LED (4). The sub-circuit (24) includes a sub-circuit rectifier (1a, 1b, 1c, 1d) that is connectable to the transformer (25), and a constant current regulator (7) and a sub-circuit capacitor (6) that are connected parallel to the sub-circuit rectifier (1a, 1b, 1c, 1d).

主权项

1. An electrical device that includes a sub-circuit, said sub-circuit including first connectors configured for connecting the sub-circuit to at least one electronic transformer and second connectors whereby the sub-circuit is connected to at least one powered circuit, said sub-circuit forming part of an electronic circuit with the powered circuit;wherein said sub-circuit includes:
at least one sub-circuit rectifier that is connectable to the electronic transformer via the first connectors and that is configured to supply DC to the second connectors; a constant current regulator connected to the second connectors; and a sub-circuit capacitor that is connected parallel to the constant current regulator; wherein said electronic circuit includes a buffer capacitor connected parallel to the powered circuit; and wherein said electronic circuit includes at least one anti reverse current diode connected between the sub-circuit and the powered circuit.