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Micrel Launches High Power Monolithic Boost LED Driver With 3.5A Integrated FET

Micrel, Inc., an industry leader in analog, high bandwidth communications and Ethernet IC solutions, rolled out the MIC3223, a high power Boost regulator for driving high power LEDs.

MIC3223 is a monolithic switching regulator with integrated 3.5A, 37V power switch and can be used for driving high brightness 1-W or 3-W LEDs. The MIC3223 is currently available in volume quantities, with pricing starting at $1.46 for 1K quantities. Samples can be ordered at: http://www.micrel.com/ProductList.do

“Micrel's MIC3223 provides the performance, flexibility and ease-of-use required by LED lighting system designers to meet backlighting challenges,” noted Doyle Slack, senior marketing director of analog power, linear and RF at Micrel. “In addition to the low feedback reference voltage and an integrated high current power MOSFET, the MIC3223 provides the ability to drive an external N-channel switch to control the brightness of the series connected high power LEDs.”

The MIC3223 is capable of driving up to ten LEDs in series with +/- 5 percent current accuracy from an input voltage range of 4.5V to 20V. With its peak current mode control boost architecture and integrated power switch delivering greater than 90 percent efficiency, the solution is well positioned to provide constant current with changes in input voltage and output load. The device implements a fixed 1.0 MHz PWM control scheme to allow flexibility in the design. The LED current can be programmed to a wide range of values through the use of an external resistor.

The MIC3223 features a PWM dimming input and an output driver to drive an external N-channel FET for PWM dimming at frequencies up to 20 kHz. It also offers an enable pin for very low power shutdown and an UVLO. The device has a wide range of protection features including output over voltage protection and an over temperature protection. In addition to enhanced power driving capability/reliability, the MIC3223 comes in an exposed pad TSSOP-16L package and operates over a junction temperature range of -40degC to 125degC.


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Samsung Electronics Co., Ltd., a world leader in digital consumer electronics and information technology, today announced the fastest external hard drive yet in its STORY Station product portfolio – the Samsung STORY™ Station 3.0 with the SuperSpeed USB 3.0 interface. The top-of-line 3.5-inch external hard drive now offers 10 times faster speed compared to the previous USB 2.0 interface, making it the ideal storage solution for saving and retrieving crucial data in the blink of an eye.

“The Samsung STORY Station 3.0 has been built for advanced users who demand fast transfer speed and data security without sacrificing design,” said H.S. Lee, vice president, storage marketing, Samsung Electronics. “The STORY Station creates a seamless user experience that allows users to move large chunks of high-quality multimedia content with minimal wait time.”

The SuperSpeed USB 3.0 interface offers a maximum transfer rate of 5 gigabits per second (Gbps) compared to 480 megabits per second (Mbps) in USB 2.0. Users can now transfer 4MB of music (equivalent of a 3-minute song) or image files (6 megapixel camera inhi-resolution photos) in approximately 0.02 seconds and an HD movie in 2.3 minutes. The new interface is backward-compatible with USB 2.0 and 1.1 interfaces.

In keeping with Samsung’s world-class design tradition, the STORY Station line-up is the winner of an iF award 2009 in product design category. The minimalist design was inspired by retro electronics and combines a grey, brushed aluminum casing with the logo stenciled in red. The casing materials are RoHS-compliant, and the ventilation slits facilitate even heat dissipation to ensure reliable performance.

Designed with the environment in mind, the STORY Station 3.0 features three energy-saving modes including idle, sleep and suspend. The standby power level meets requirements for the European Union EuP (Energy Using Products) Directive for Standby Regulation.

The STORY Station 3.0 drive, available in densities ranging from 1TB to 2TB, is a part of the growing STORY product portfolio. The line-up now offers the widest range available in premium desktop storage – The STORY Station USB 2.0, the STORY Station Plus with e-SATA and USB 2.0, and the latest STORY Station 3.0. Preloaded software suites include Samsung Auto Backup, SecretZone™ and SafetyKey™ for data encryption and password protection.

The Samsung STORY Station 3.0 drives will be available globally by April, 2010 and it features a three-year warranty.


IT에 관심 있으시다면 아래 ‘디토커’ 페이스북 페이지 좋아요를 클릭해주시면 
빠른 IT 정보와 훨씬 재미있는 IT 이야기를 페이스북에서 받아 보실 수 있습니다!



자동차에 관심 있으시다면 아래 ‘카스토리’ 페이스북 페이지 좋아요를 클릭해주시면 
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