Exar Releases 8-Channel Compact Power Optimizing LED Driver

Smart Talk™ Technology Minimizes Power Needed to Drive Multiple Strings of Multiple LEDs

Sep 26, 2011, 07:45 ET from Exar Corporation

FREMONT, Calif., Sept. 26, 2011 /PRNewswire/ -- Exar Corporation (Nasdaq: EXAR) unveiled today the XRP7618 an 8-channel constant current LED driver. Supporting up to 30V on its LED channel inputs, the XRP7618 is ideally suited to drive up to eight strings of multiple LEDs at currents up to 100mA. Several devices can be cascaded to drive additional channels. This makes the XRP7618 the solution of choice for mid to large panel backlighting applications using a matrix of LEDs. Channels may also be combined to achieve customized higher currents per channel while Exar's Smart Talk™ technology reduces overall system power consumption and heat dissipation.

"LEDs are becoming increasingly more prevalent in all aspects of lighting, where they provide a simple, efficient and highly customizable solution," said Eric Pittana, director of marketing, Power Product Line. "The XRP7618 provides the same versatility and performance at the driver level for all lighting applications requiring multiple strings of several LEDs."

Key Product Features

With a capability of 100mA per channel and outputs rated at 30V, the XRP7618 can control strings of multiple LEDs with better than +/- 1.5% channel to channel current matching. Multiple channels can be combined to increase current driving capability per channel, up to 800mA, and multiple XRP7618s can be placed in parallel for applications requiring more than eight strings of LEDs. Current is programmed via an external resistor while analog or PWM dimming control is supported up to 25kHz. Featuring Exar's Smart Talk™ technology, the XRP7618 maximizes the overall system efficiency by dynamically reporting the minimum LED voltage necessary to maintain current regulation mode. The under voltage lock out, open LED, and over temperature protection functions insure 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 high-performance and industry-proven power management solutions including handset and lighting controls, power conversion, and standard linear devices.

Prices, Packages, Availability and Additional Information

The XRP7618 is available now in volume quantities and offered in a RoHS compliant, "green" halogen free exposed pad 20-pin TSSOP package. Pricing starts at $0.69 for 1K units.

Additional information on the XRP7618 product can be found at:


Additional information on Exar's other power distribution switches can be found at


About Exar

Exar Corporation delivers highly differentiated silicon, software and subsystem solutions for data communication, storage, consumer and industrial applications. For over 40 years, Exar's comprehensive knowledge of end-user markets along with the underlying analog, mixed signal and digital technology has enabled innovative solutions that meet the needs of the evolving connected world. Exar's product portfolio includes power management and interface components, communications products, storage optimization solutions, network security and applied service processors. Exar has locations worldwide providing real-time customer support to drive rapid product development. For more information about Exar, visit: www.exar.com.

SOURCE Exar Corporation