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Exar Introduces New Drivers
for High-Power LEDs

Exar Provides New Scalable Evolutionary Solutions for Driving High Power Light Emitting Diodes

Exar Corporation Press Release

FlashlightNews.org - 4/8/2009


Click photo to enlarge

XRP7603 Schematic

XRP7603 Schematic

FREMONT, Ca. - Exar Corporation (Nasdaq: EXAR) has released the XRP7603 and XRP7604 LED drivers capable of driving high power, high brightness LEDs up to 0.5Amp and 1Amp respectively. These devices complement and are pin-to-pin compatible with Exar's SP7600 rated at 2Amp. With a 4.5V to 29V operating range these LED drivers can support most retail and architectural lighting systems which typically use 12V or 24V power sources. New consumer electronics devices can also find a use for these high current LED drivers, such as the latest LED compact projectors.

"The XRP7603 and XRP7604 are designed to meet the needs of the latest high current LEDs," said David Matteucci, vice president, Power Management Products. "Leveraging the success of Exar's SP7600 announced in February 2008, the XRP7603 and XRP7604 provide system architects and designers with a single scalable design solution capable of seamlessly supporting many LED lighting applications from 500mA to 2A."

Key Product Features

Operating at a frequency of 1.2MHz with integrated loop compensation, Exar's family of high power step-down LED drivers fit within a minimal solution footprint -- merely the combined size of the high brightness LED and its heatsink. A low 200mV feedback reference voltage reduces the power dissipation in the current sense resistor while maximizing efficiency at up to 95%. Conversions from 29V can be a challenge for many buck regulators; however, these LED drivers easily convert from 29V to the 4V across the LED with a guaranteed minimum on-time of 100ns. Dynamic brightness control is achieved through a PWM or analog dimming scheme and a programmable over current and under voltage lock-out protection insures safe operation under abnormal operating conditions.

Power Management Products

Highly reliable, accurate, power management is a critical part of any technology system. Exar has a broad array of industry-proven power management solutions. Exar's families of high current single chip PowerBlox™ step-down regulators and high power LED drivers demonstrate innovative solutions for industry standard POLA module replacements and high performance general lighting.

Prices, Packages, Availability and Additional Information

Samples of the XRP7603 and XRP7604 are available now. Offered in a thermally enhanced SO-8 package operating over the -40AC to +85AC temperature range, the XRP7603 and XRP7604 are respectively priced at $0.79 and $0.99 in 1K piece quantities.

Additional information on the XRP7603 product can be found at exar.com/Common/Content/ProductDetails. Additional information on the XRP7604 product can be found at exar.com/Common/Content/ProductDetails. Additional information on these and other power products can be found at exar.com/Common/Content/Product.

About Exar

Exar Corporation is Powering Connectivity by delivering highly differentiated silicon solutions empowering products to connect. With distinctive knowledge in analog and digital technologies, Exar enables a wide array of applications such as portable devices, home media gateways, communications systems, and industrial automation equipment. Exar has locations worldwide providing real-time system-level support to drive rapid product innovation. For more information about Exar visit: exar.com.

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