National Semiconductor Introduces LM3530, Industry’s Smallest White Light-Emitting Diode (LED) Driver with Dynamic Display Backlight Control
The LM3530 is a member of National’s PowerWise(R) energy-efficient product family, drives up to 11 high-current LEDs in series, illuminating larger displays in portable media devices such as smartphones. The LM3530 is offered in a 12-bump micro SMD package measuring just 1.615 mm × 1.215 mm × 0.425 mm. The LM3530 LED driver employs sophisticated ambient light-sensing algorithms and content-adjustable backlighting to optimize the display, realizing up to a 55 percent power saving over the common practice of driving the backlight at a constant brightness. LM3530 current-mode boost converter can supply up to 29.5 mA of power to 11 white LEDs from a single-cell Lithium-Ion battery. The LM3530’s programmable ambient light response along with a separate pulse-width modulation (PWM) dimming input enable the backlight LED driver to intelligently determine lighting requirements and select between various dimming options, optimizing the light output for the given conditions. The LM3530 brings power savings to the serial implementation of large display backlighting…
LM3530
(Pictures: National Semiconductor)
