Products, Materials & Tools | May 14, 2010

Micrel Brings Savings To Mainstream Lighting Apps: New Wide Input Voltage HBLED Driver Controller IC

Micrel Inc., an industry leader in analog, high bandwidth communications and Ethernet IC solutions, today rolled out the MIC3203, a new Step-Down High Brightness LED (HBLED) driver controller IC with high-side current sense and PWM dithering feature for EMI control.

This device reduces the complexity and cost of LED driver solutions for high current MR-16 lamps, track/pathway lighting and other architectural lighting applications.  The MIC3203 is currently available in volume quantities, with 1Ku pricing starting at $0.82. 

Samples can now be ordered at:  http://www.micrel.com/ProductList.do

Features:
• 4.5V to 42V input voltage range
• High efficiency ( >90%)
• ±5% LED current accuracy
• MIC3203: Dither enabled for low EMI
• MIC3203-1: Dither disabled
• High-side current sense
• Dedicated dimming control input
• Hysteretic control (no compensation!)
• Up to 1.5MHz switching frequency
• Adjustable constant LED current
• Over-temperature protection
• -40 °C to +125 °C junction temperature range

"With the ever increasing concern regarding carbon emissions and energy costs, high-efficiency lighting has become one of the highest growth segments of the electronics market," noted Doyle Slack, senior marketing director for analog power, Micrel.  "Micrel's LED driver products provide the performance, flexibility and ease-of-use required by LED lighting system designers to meet these challenges."

The MIC3203 is capable of driving multiple HBLEDs in series at more than 90 percent efficiency with +/-5 percent current accuracy from input voltages of 4.5V to 42V.  With its hysteretic control architecture and high-side current sense scheme, the MIC3203 provides an ideal solution to drive the HBLED's with constant current.  The MIC3203 operating frequency is adjustable up to 1.5MHz to allow flexibility in the design.  The MIC3203 features a dedicated PWM dimming pin, an enable pin for very low power shutdown, over temperature protection and an under voltage lockout.  The MIC3203 has an external power switch and requires no external compensation.  In addition to enhanced power driving capability and reliability, the MIC3203 is available in an SOIC-8L package.

About Micrel:
Micrel Inc. is a leading global manufacturer of high performance analog and high-speed mixed signal solutions. The Company's products include advanced mixed-signal, analog and power semiconductors; high performance communication, clock management, Ethernet switch and physical layer transceiver ICs. Company customers include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer products. Corporation headquarters and state-of-the-art wafer fabrication facilities are located in San Jose, CA, with regional sales and support offices and advanced technology design centers situated throughout the Americas, Europe and Asia. In addition, the Company maintains an extensive network of distributors and sales representatives worldwide.

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