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LED drivers promise flexibility, ease-of-use

Posted: 03 Jul 2009 ?? ?Print Version ?Bookmark and Share

Keywords:LED driver? solid-state lighting? PWM?

MIC3230 LED driver

Micrel Inc. has unveiled a new series of high-brightness that target solid-state lighting applications. The first three of the series, the MIC3230/31/32, drive 1W, 3W and higher power LEDs.

Andrew Cowell, VP of analog 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, overvoltage protection, over temperature protection and undervoltage 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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