Targeted at mobile backlighting applications, the latest LED driver device supports up to six LEDs with a maximum current of 32mA per channel. The industry-standard I2C serial interface product joins the previously announced six-channel PWM and 1-wire interface products to give mobile phone design engineers more flexibility with a new set of performance/interface choices.
"Mobile phone design houses everywhere are adding content-rich multimedia applications. This creates the need for larger displays, requiring six LEDs instead of four for illuminating the display's backlight," said Adolfo Garcia, Senior Director of LED Drivers at Leadis Technology. "These multimedia applications also create a need for more efficient LED drivers in order to conserve battery power. Whether mobile cell phone designers prefer a PWM, 1-wire, or now an I2C serial interface, Leadis is well positioned to support this new six-channel market. Moreover, Leadis' LED drivers will continue to address and improve on the most important requirement in these mobile appliances: longer battery life."
Leadis' ultra low voltage dropout PowerLite Current Regulator provides a typical transition threshold of only 50mV, allowing the device to stay in a charge-pump driver's highest-efficiency mode longer than competing devices. Additionally, this patent-pending technique also solves one of the most significant problems associated with charge-pump based LED drivers, namely the transition between the high-efficiency state (1x-mode) and the lower efficiency states. By lowering the dropout voltage of the driver to only 50mV, battery life can be extended by up to 10%.
About the LDS8860
The LDS8860 is a high-efficiency 1x/1.5x/2x fractional charge pump with programmable current in six LED channels. The addition of an ultra low dropout PowerLite Current Regulator increases the LDS8860's efficiency up to 91%. Low noise and input ripple performance is achieved by operating the charge pump at a constant switching frequency of 1 MHz, which allows the use of small external ceramic capacitors.
The LED channels are configured into three independent banks, each containing 2 matched channels. Each pair can be separately programmed from zero to 32mA, in 0.5mA increments, using the I2C serial interface. Any individual channel can be disabled, while others remain active. The device is available in a 16-lead TQFN 4mm x 4mm or a 3mm x 3mm package with a maximum height of 0.8mm.
For more information, visit www.leadis.com. Contact Information: Tracy Lam Director, World-Wide Marketing Communications, Leadis International Ltd., Tel: 852-21528880
About Leadis Technology, Inc.
Leadis Technology, Inc., headquartered in Sunnyvale, California, designs, develops and markets analog and mixed-signal semiconductors that enable and enhance the features and capabilities of mobile and consumer electronics devices. Leadis' product offerings include color display drivers, which are critical components of displays used in mobile consumer electronic devices; LED drivers, which provide controlled levels of current required to drive light emitting diodes in diverse applications including mobile backlight units; Power Management ICs including LDOs, LDO controllers, shunt references, thermal switches, current regulators, and battery charger controllers; and audio CODEC and FM transmitter ICs, which are integral components in mobile media players and their associated aftermarket accessories. Leadis currently supplies display drivers supporting the major small panel display technologies, including a-Si and LTPS TFT LCDs, color STN LCDs, and color OLED displays, LED drivers supporting mobile backlighting applications, and audio ICs supporting portable media players and aftermarket audio accessories.
Certain statements in this press release including, but not limited to, statements as to the anticipated features, capabilities, benefits, potential market size, intended uses and performance of Leadis' new LED Driver IC, are forward-looking statements that are subject to risks and uncertainties that could cause results to be materially different than expectations. Such risks and uncertainties include, but are not limited to, delays in ramping new products into production, lack of market acceptance of our new products, risks associated with the company's efforts to expand its business beyond LCD display drivers, including the new LED drivers, delays in the integration of our products into consumer electronic devices, our reliance on third-party manufacturers, general mobile handset and semiconductor industry trends, and other risks detailed from time to time in Leadis' reports filed with the Securities and Exchange Commission including its Form 10-K for the year ended December 31, 2006 and its Form 10-Q for the quarter ended September 30, 2007. Leadis disclaims any obligation to update these forward-looking statements. (LDISG)
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