Backlight LED Driver offers inductive boost capabilities.March 19, 2008 -
Supplied in 2.9 x 2.8 mm SOT23-6 package, SP6699 is suited for space-constrained backlighting applications, such as small displays/keypads in handheld portable devices, where LEDs must be tightly regulated to achieve uniform brightness. It can drive up to 5 series LEDs with only 4 external components and is compatible with PWM dimming up to 1 kHz as well as analog dimming. Able to achieve shutdown current of 3.2 µA, product operates from 2.5-16 V.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Exar Corp.
48720 Kato Road
Fremont, CA, 94538
USA
Exar Offers Light Emitting Diode (LED) Driver with Inductive Boost Capabilities - Ideal for Space Constrained Backlighting Applications
FREMONT, Calif., March 10 -- Exar Corporation (NASDAQ:EXAR) released a new LED driver with inductive boost capabilities giving system architects additional design options for backlighting applications. The SP6699 is ideal for small display/keypad LED lighting applications found in handheld portable devices such as PDAs, cell phones and data collection devices.
"Added to Exar's full line of industry-proven charge pump LED drivers, an inductive boost device delivers to system architects a highly efficient device for applications where LEDs must be tightly regulated to achieve uniform brightness," said Joe Vyvijal, vice president, Power Product Line. "The SP6699, available in a small 2.9x2.8mm SOT23-6, is capable of driving up to five series LEDs with only four external components."
Key Product Features
The SP6699 is compatible with PWM dimming up to 1 kHz and analog dimming and achieves the shutdown current of 3.2uA. The SP6699 operates from 2.5V all the way up to 16V achieving 84% efficiency using a 0.2V feedback to minimize power loss. The 0.2V feedback is +/-6% accurate over the full operating temperature range. In addition, the SP6699 has an Over Voltage Protection (OVP) to ensure it can not be damaged in the event of an open circuited LED or a shorted feedback resistor.
"A good example of reducing board real estate needs is seen on the SP6699 with the integration of the schottky diode (a switch boost regulator), and by driving up to five LEDs in series display enabling designers to reduce connector pin count," said Eric Pittana, director of product marketing, Power Product Line.
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
Samples of the SP6699 are available now in a -40 degrees C to +85 degrees C temperature range. In 1,000 piece quantities in a SOT-23-6 package, the SP6699 is $0.59. Additional information on this product can be found at http://www.exar.com/Common/Content/Pr.... Additional information on Exar's other LED drivers can be found at http://www.exar.com/Common/Content/Pr....
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: http://www.exar.com/.
CONTACT: Greg Kaufman, Marketing Communications of Exar Corporation, +1-510-668-7000
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