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Intersil's Latest Single Ended Buck LED Driver Controllers Reduce Cost, Maximize Efficiency

ISL1903/04 Provide Great Dimming Capability for Isolated and Non-Isolated AC Mains LED Lighting Applications

MILPITAS, CA -- (Marketwire) -- 01/31/13 -- Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high-performance analog and mixed signal semiconductors, has introduced two new LED driver controllers that not only operate in critical conduction mode (CrCM) but also deliver the industry's highest efficiency and dimming performance in industrial and commercial lighting systems.

The ISL1903 and ISL1904 are high-performance; single-ended buck and flyback LED driver controllers that support single-stage conversion of the AC mains to a constant current source with power factor correction (PFC). Designed for isolated and non-isolated power applications, the ISL1903 supports buck converter topologies including isolated forward converters and non-isolated source return buck converters. The ISL1904 supports isolated flyback as well as non-isolated SEPIC and Boost topologies. They operate in CrCM to allow near zero-voltage switching, maximizing both efficiency and magnetic core utilization. Both the ISL1903 and ISL1904 may also be used with DC input sources.

Both devices deliver near-universal dimmer compatibility, and are designed for industrial and commercial lighting installations and retrofits. Additionally, they can be used in DC or AC input LED ballasts and in universal AC mains input LED retrofit lamps.

Features and Specifications

  • Configurable for either PWM or DC current dimming control of LEDs
  • Compatible with leading and trailing edge dimmers
  • Zero to 100 percent dimming capability
  • Corrected power factor of 0.995 enables Energy Star rating
  • Less than 20% harmonic content
  • Closed loop soft-start assures no overshoot
  • Primary side current sensing eliminates the need for opto-couplers, lowering BOM cost
  • -40 degrees to +125 degrees C operation

Pricing and Availability
The ISL1903 and ISL1904 are available now in compact 16-lead QSOP packages, with prices starting at $0.84 each in 1,000-unit quantities.

For more information please visit:
http://www.intersil.com/content/intersil/en/products/power-management/led-drivers/led-lighting-drivers/ISL1903.html
http://www.intersil.com/content/intersil/en/products/power-management/led-drivers/led-lighting-drivers/ISL1904.html

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About Intersil
Intersil Corporation is a leader in the design and manufacture of high-performance analog, mixed-signal and power management semiconductors. The company's products address some of the fastest growing markets within the industrial and infrastructure, personal computing and high-end consumer markets. For more information about Intersil or to find out how to become a member of our winning team, visit our website and career page at www.intersil.com.

Intersil and the Intersil logo are trademarks or registered trademarks of Intersil Corporation. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners.

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