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Optoelectronics/Displays  

New drivers light solid-state LEDs

Posted: 03 Jul 2009     Print Version  Bookmark and Share

Keywords:LED driver  solid-state lighting  PWM 

MIC3230 LED driver

Micrel Inc. unveiled a family of three high-brightness LED drivers targeting solid-state lighting applications, as well as general lighting solutions. The MIC3230/31/32 are the first in a new series of high-brightness LED drivers that provide the flexibility of driving 1W, 3W and higher power LEDs that are available on the market today.

Andrew Cowell, VP of analogue at Micrel, explained that as the world continues to look for green technology and energy efficient solutions to meet the challenges of energy prices and resources, "High power LEDs provide much needed energy efficiency in lighting." He claimed that "Micrel's LED drivers provide the flexibility and ease-of-use for efficiently powering this growing alternative lighting solution."

The MIC3230/31/32 series offers operating input voltage range from 6V to 45V. It has a feedback voltage of 250mV to cut system level power dissipation and a programmable current control to drive different current levels available for a variety LEDs. The entire product family can boost up to a very high voltage and is capable of driving an output up to 70W. The MIC3230/31 has an adjustable operating frequency from 10kHz to 1MHz and the MIC3232 has a fixed frequency operation of 400kHz to allow flexibility in the design. The MIC3231 features a dithering capability which can reduce EMI by up to 12dB. The three products feature PWM dimming capability, an enable pin for very low power shutdown, over-voltage protection, over temperature protection and under-voltage lockout.

The MIC3230/31come in 12-lead MLF and 16-lead exposed pad TSSOP packages. The MIC3232 is available in a MSOP-10 package.





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