Products, Materials + Tools | Feb 04, 2013

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

Intersil Corporation, 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° to +125°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

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.

FEATURED

Edison Released Brand New DOB III Series Products

Edison Released Brand New DOB III Series Products The DOB III series increased the efficiency, dimming smoothness also provide ultra- low flicker function (flicker 5% and even 5% during dimming). It is compliant to the 2021 European flicker standard IEC TR61547( PstLM) and to CIE TN006 (SVM) on request. It can be applied in many different lighting ... Read more »

EDITORIAL

Würth Elektronik's Power-Saving WL-SMTW: Colors for Feeding Plants

Würth Elektronik's Power-Saving WL-SMTW: Colors for Feeding Plants SMT mountable LEDs in a 2835 package extend Würth Elektronik extensive range of horticulture LEDs. The three WL-SMTW series LEDs emit light of the wavelengths 450 nm (Deep Blue), 660 nm (Hyper Red) and 730 nm (Far Red) – ideal for applications controlling plant growth through specific light ... Read more »

EDITORIAL

Higher-Performance UV-C Solutions from Lumitronix Feature Nichia's New NCSU334B UVC LED

Higher-Performance UV-C Solutions from Lumitronix Feature Nichia's New NCSU334B UVC LED Following the successful introduction of the first UVC LED modules in August 2020, LED expert Lumitronix from Hechingen is expanding the existing concept of linear module solutions with three new, more powerful versions. These are as well mainly addressed to professional customers who are trained ... Read more »

EDITORIAL

Nexperia Launches Industry-First LED Drivers in DFN Package with Side-Wettable Flanks

Nexperia Launches Industry-First LED Drivers in DFN Package with Side-Wettable Flanks Nexperia, the expert in essential semiconductors, today announced a new range of LED drivers in the space-saving DFN2020D-6 (SOT1118D) package. This case style features side-wettable flanks (SWF) which facilitate the use of AOI (automated optical inspection), and improve reliability. This is the ... Read more »