High-efficiency lighting devices having dimmer and/or load condition measurement

Patent metadata

Field	Value
Publication number	US-9101010-B2
Application number	US-201414212546-A
Country	US
Kind code	B2
Filing date	Mar 14, 2014
Priority date	Mar 15, 2013
Publication date	Aug 4, 2015
Grant date	Aug 4, 2015

Abstract

A circuit for powering high-efficiency lighting devices from a thyristor-controlled dimmer includes a power converter for powering the high-efficiency lighting devices from input terminals of the circuit. The circuit also includes a control circuit that controls the input current drawn by the input terminals at least while the power converter transfers energy to the lighting devices. The circuit also includes a sensing circuit that determines or measures at least one attach current characteristic at the input terminals and stores an indication of the characteristic for subsequent operation of the control circuit.

First claim

What is claimed is:

1. A lighting circuit for powering one or more lighting devices from an output of a thyristor-switched dimmer circuit, comprising:
input terminals for coupling the lighting circuit to the output of the thyristor-switched dimmer circuit, wherein the thyristor-switched dimmer circuit supplies an input voltage and an input current to the lighting circuit at the input terminals;
a power converter having an input coupled to the input terminals and at least one out…

Assignees

• Cirrus Logic Inc

Inventors

• Melanson John L
• King Eric
• Maru Siddharth

Classifications

• H05B45/3575

  Electricity · mapped topic

• H05B45/10

  Electricity · mapped topic

• H05B45/14

  Electricity · mapped topic

• H05B33/0848

  Electricity · mapped topic

• H05B33/0806 Primary

  Electricity · mapped topic