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LED driver boasts multiple dimming control

Posted: 24 Sep 2012 ?? ?Print Version ?Bookmark and Share

Keywords:LM3463? LED driver? high-power application?

Texas Instruments Inc. has unleashed a six-channel LED driver that delivers a dynamic headroom control for high-power applications. The company indicated that the LM3463 is the industry's first wide-input voltage LED driver with multiple dimming control modes that maximises system efficiency and reduces complexity in LED area lighting applications such as street, high-bay and ceiling lights.

The LM3463 is a 12-95V device that drives up to 28 LEDs per string with dimming control that is easily managed by an external microcontroller via the dimming input pins. It works in conjunction with external N-channel MOSFETs and sense resistors to accurately and individually regulate current to each LED string. Dynamic headroom control improves system efficiency by automatically adjusting the LED supply to the lowest level required for LED current conduction. This reduces component count and increases system efficiency while reducing system complexity and cost, TI noted.

The LM3463 is available in volume from TI and its authorised distributors. The LM3463 is offered in a 7 x 7mm, 48-pin LLP package and is priced at $4.19 each in 1,000-unit quantities.

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