A constant current LED driver is an LED power supply that regulates the current flowing through an LED array so as to maintain a desired level of light output. Conventional power supplies provide an output that is regulated to deliver a constant voltage. A current-regulated LED driver is an AC-DC or DC-DC converter with output tailored to the electrical characteristics of the array of LEDs. It provides accurate output current control regardless of the supply-voltage fluctuations and the changes in other operating conditions. Nevertheless, the current regulation requirement introduces special challenges to the design of LED power supplies and results in a motley crowd of products with various degrees of compromise among cost, performance and lifetime.
at the Open Lighting Product Directory (OLPD)
