ON Semiconductor introduces tiny triple-output LED driver with I2C interface

July 20, 2007
Date Announced: 20 Jul 2007 ON Semiconductor Introduces Tiny Triple-Output LED Driver with I2C Interface for RGB Fun Lighting or LCD Backlighting in Portable Devices-- New NCP5623 requires minimal board space, delivers gradual dimming and achieves 94 percent peak efficiency while enabling the display of more than 32,000 colors PHOENIX, Ariz. – ON Semiconductor (Nasdaq: ONNN), a global leader in power semiconductor solutions, today introduced the NCP5623 – a high efficiency triple output LED driver with I2C interface and built-in gradual dimming. The device is specifically designed to drive tricolor RGB (red, green, blue) LEDs for fun lighting or enhanced LCD backlighting in portable applications such as cell phones and MP3 players. Offered in the compact LLGA-12 package, the NCP5623 is the smallest RGB LED charge pump driver housed in a non-bump plastic package on the market today.“The use of LEDs to generate lighting patterns continues to enhance the appeal and interactivity of portable devices,” said Manor Narayanan, vice president and general manager of ON Semiconductor’s Digital and Consumer Products Group. “ON Semiconductor’s highly efficient and ultra-small NCP5623 LED driver offers a unique built-in control algorithm that generates plug-and-play lighting effects with a vast palette of colors for portable applications.”The NCP5623 LED driver performs autonomous operations upon the command of the processor via its I2C interface. Its three independently controlled current outputs - with +/- 0.5 percent typical matching tolerance and 32 current levels - allow the display of more than 32,000 colors with a tricolor RGB LED. The device features an integrated gradual dimming feature, which progressively increases or decreases output current to produce a theatrical fade-in/fade-out effect. The use of a logarithmic current profile ensures the light and color changes appear smooth and linear to human eyes. To help maximize battery life, the NCP5623 achieves 94 percent peak efficiency with less than 1 micro ampere (µA) standby current over the operating range of a Lithium based battery. Despite the small IC package, the device requires only four passive components to operate in a typical application. The device also features short-circuit and overvoltage protection, which protects the system in case of LED failure.Packaging and PriceThe NCP5623 is housed in the lead-free (Pb-free) 2.0 mm x 2.0 mm x 0.55 mm LLGA-12 package and is budgetary priced at $0.55 USD per unit for 3,000 unit quantities.

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