LED Dot Matrix Driver

The AS1119 LED dot matrix driver from austriamicrosystems (Unterpremstaetten, Austria) drives 144 LEDs but requires only 9 mm² PCB space, reduces external component count, reduces connector pin count, and requires fewer PCB layers. The AS1119 is targeted for dot matrix displays in mobile phones and personal electronics. An 8-bit analog current control allows fine tuning of each matrix to compensate for different brightness of different colors, or to adjust the white balance on RGB LEDs. The AS1119 LED dot matrix driver incorporates 6 frames of memory for small animations or for use as a buffer to reduce host processor load, saving energy and processing time. Battery life is extended with the inclusion of an on-chip 320 mA charge pump.