Sipex expands LED camera flash driver family

Date Announced: 08 Apr 2005

Sipex Corporation further expands its family of LED drivers with the SP6686, a current regulated buck/boost charge pump delivering 400mA. Providing two independently adjustable and selectable output current levels for flash and torch modes, the SP6686 is an ideal solution for camera flash applications in cell phones.

Operating at an industry leading 2.4 MHz switching frequency, the SP6686 requires only three tiny external capacitors (0.47uF, 1uF, and 2.2uF), reducing the overall solution's footprint to new levels.

The SP6686 delivers up to 94% efficiency thanks to a proprietary feature that enables the IC to automatically transition from the linear buck mode to the 2x boost mode based on the battery input voltage. This also ensures the current does not depend on the LED forward voltage. An extremely low output equivalent resistance and reference voltage allows for the highest white LED flash brightness and an ultra low dropout voltage. The SP6686 also features a very low shutdown current, an automatic soft-start mode to limit inrush current, as well as over current, over voltage and thermal-shutdown control.

"The new SP6686 and the recently announced SP6685 are breakthrough products for high-end and mainstream cell phone camera flash applications, offering high efficiency, the industry's smallest solution size and reduced external component cost," said Kevin Plouse, senior vice president of marketing and business development.

SP6686 Key Features (Typical)

-- Fast 2.4MHz Operation Allowing for Smallest Peripherals and Low Noise
-- Current Regulated Buck/Boost Charge Pump Topology
-- No Inductor Necessary• Output Current: 400mA
-- Two Independently Adjustable and Bit Selectable Output Current Levels
-- High Efficiency Operation: Up to 94%
-- Ultra Low Dropout Voltage
-- Very Low Shutdown Current: 1uA
-- Wide Input Voltage Range: 2.7V to 5.5V
-- Tiny 10-pin 3x3 DFN package

The SP6686 is available now starting at $1.59 in 1,000 piece quantities. Samples and evaluation boards are also available. Datasheets and additional information on the SP6686 can be found on the Sipex web site at www.sipex.com.

Contact
Sharon Guerrand Tel. +1-408-934-7500 Fax: +1-408-935-7600

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Web Site:http://www.sipex.com

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