Power supply configuration across isolation barrier
AssigneeSignify Holding B.V.
InventorsBERND CLAUBERG, YUHONG FANG
Life of this patent
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Abstract
A device, system, and method configure a power supply of a powered device. The powered device includes a digital addressable lighting interface (DALI) connected to a load to be powered by a power source. The powered device includes an isolator. The powered device includes a controller positioned on a primary side of the isolator. The controller is configured to generate a first signal to select whether to provide power to the 5 DALI at a zero current value or a maximum current value. The controller is further configured to generate a second signal to provide power to the DALI at a selected current value between the zero current value and the maximum current value.
Claims15
A powered device, comprising:
- a digital addressable lighting interface (DALI) connected to a load to be powered by a power source;
- an opto-isolator connected to the DALI;
- a controller positioned on a primary side of the isolator, the controller configured to generate a first signal to select whether to provide power to the opto-isolator so that the opto-isolator is conducting or not conducting, wherein when the opto-isolator is conducting the DALI has a maximum current value and when the opto-isolator is not conducting the DALI at a zero current value, the controller further configured to generate a modulated second signal to provide power to the isolator, so that the opto-isolator is conducting with a duty cycle and frequency, and wherein the DALI has a selected current value between the zero current value and the maximum current value, based on the modulated second signal;
- and
- a buck converter receiving a current reference based on a voltage reference based on the second signal, the buck converter configured to output a fixed voltage to the DALI.
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A method, comprising:
- generating a first signal to select whether to provide power to an opto-isolator so that the opto-isolator is conducting or not conducting, wherein when the opto-isolator is conducting a digital addressable lighting interface (DALI) connected to the opto-isolator and a load to be powered by a power source has a maximum current value and when the opto-isolator is not conducting the DALI at a zero current value;
- generating a modulated second signal to select to provide power to the opto-isolator, so that the opto-isolator is conducting with a duty cycle and frequency, and wherein the DALI has a selected current value that is between the zero current value and the maximum current value, based on the modulated second signal;
- receiving, at a buck converter, a current reference based on a voltage reference based on the second signal;
- and
- outputting, by the buck converter, a fixed voltage to the DALI by the buck converter.
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Dependencies are inferred from the claim text.