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High intensity LED drivers using NCP3065/NCV3065

Posted: 18 Apr 2008 ?? ?Print Version ?Bookmark and Share

Keywords:High brightness LED? HB LED? LED driver?

High brightness LEDs are a prominent source of light and have better efficiency and reliability than conventional light sources. Improvements in high brightness LEDs present the potential for creative new lighting solutions that offer an improved lighting experience while reducing energy demand. LEDs require constant current driver solutions due to their wide forward voltage variation and steep V/I transfer function. For applications that are powered from low voltage AC sources typically used in landscape lighting or low voltage DC sources that may be used in automotive applications, high efficiency driver that can operate over wide range of input voltages to drive series strings of one to several LEDs.

This application note describes a DC/DC converter circuits that can easily be configured to drive LEDs at several different output currents and can be configured for either AC or DC input. The NCP3065/NCV3065 can be configured in a several driver topologies to a drive string of LEDs: be it traditional low power LEDs or high brightness high power LEDs such as the Lumileds Luxeon K2 and Rebel series, the CREE XLAMP 4550 or XR series, the Osram OSTAR, TopLED and Golden Dragon.

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