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Product Focus
Reviewing Recent Developments on the LED Driver IC Front
Doug Bess
Editor, PowerPulse.Net
The past several months have witnessed significant new product releases, technological developments, and industry news related to the field of LED Driver ICs.
July witnessed several announcements, beginning with Atmel Corp.’s new family of intelligent multi-string LED drivers for the backlighting and solid state lighting markets. Atmel states that their LED drivers offer design engineers industry-proven efficiency optimizer (EO) technology, flexible dimming options, scalability across wide range of power levels, user programmability and lower bill of material (BOM). These features are well suited for rapidly growing LED applications in direct and edge-lit LCD TVs, PC monitors, industrial, military and avionics displays, as well as general illumination in the commercial, residential, industrial and infrastructure market segments.
The LED drivers incorporate Atmel’s patent-pending efficiency optimizer technology that minimizes power consumption to the lowest practical level. This technology allows designers to use any dc-dc or ac-dc converter topology with isolated or non-isolated implementation, while dynamically maintaining the highest system power efficiency by minimizing excess voltage across LED strings.
The full story can be found here http://powerpulse.net/story.php?storyID=24240
ZMDI AG announced the availability of the ZLED7320, a new member of its high current ZLED7x20 family of 40V LED-Driver-ICs. The ZLED7320, which operates at up to 98% efficiency and is available in a small-footprint DFN-5 package, is designed to help manufacturer’s cost-effectively address the growing high-brightness (HB) LED lighting market.
"The ZLED7320 bridges the gap between our existing 0.75 and 1.2A high-efficiency drivers while the small-footprint package provides easier assembly" stated Dr. Hendrik Ahlendorf, Product Manager at ZMDI. "The ZLED7320 provides an ideal solution for many cost- and size- sensitive applications, including Retrofit LED lamps, signage, street and traffic lights, spotlights, appliance lighting and all types of general home and office illumination."
The LED driver features on-chip switching transistor, 1200:1 dimming via PWM signal or fixed voltage, up to 1A of output current at ±3% accuracy and high-side current sensing. Built-in protection includes thermal shutdown, open-circuit and short-circuit protection. Due to its output current capabilities, the ZLED7320 supports the new high brightness and high current LEDs from major LED manufacturers without requiring an additional MOSFET to the application circuit. Only the addition of 4 passive components is required for a complete LED driver solution. The device operates at a temperature range of -40 to 105°C.
The full story can be found here http://powerpulse.net/story.php?storyID=24345
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