Opto-Electronics


LED display backlight driver

4 August 2010 Opto-Electronics

The MAX8930 from Maxim integrates a charge pump for white LED display backlighting with ambient light control (ALC) feature. The high-efficiency, adaptive-mode 1x/-0,5x charge pump drives up to 11 LEDs (eight WLEDs + RGB LED) with constant current for uniform brightness. The LED current is adjustable from 0,1 mA to 25,6 mA in 256 linear steps through I²C. High accuracy and LED-to-LED current matching are maintained throughout the adjustment range. The device includes soft-start, thermal shutdown, open-circuit and short-circuit protection.

Three 200 mA LDOs are provided with programmable output voltages to provide power to external circuitry. These three LDOs can also be configured for a GPO function through the I²C. A step-up converter is also available on the IC for biasing a PMOLED subpanel. The MAX8930 is available in the 49-bump, 3,17 x 3,17 mm WLP package.

For more information contact Larry Gordon, CST Electronics, +27 (0)11 608 0070, [email protected], www.cstelectronics.co.za



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