Thursday, 30 September 2010
9-Channel LED Drivers Improve LCD Backlighting Performance
The inductor-less solution requires only three external capacitors to complete the driver circuit. High levels of functional integration coupled with thin QFN packages mean that these devices save board space and reduce manufacturing costs. The devices offer up to 93% power efficiency, maximize battery life, and feature 1% current matching accuracy between channels to deliver an extremely even, consistent screen image.
LED open and short-circuit protection, thermal and under-voltage lockout and over voltage protection are provided on all channel outputs to maximize reliability. A soft start function reduces power supply inrush current to maximize battery-operating life. Both drivers are available in a lead-free, thermally enhanced, 20-pin 3mm x 3mm 0.6mm height QFN package.