Aug 24 2010
austriamicrosystems has rolled out the new AS1119 LED dot-matrix driver that has been designed for dot matrix displays in toys, personal electronics, and mobile phones. The LED driver drives 144 LEDs, however, requires a minimal PCB space of 9 mm©÷. Hence, the driver requires less number of PCB layers, and decreases the count of connector pin and external component.
AS1119 LED driver
The dot-matrix driver offers the users smoother running animations, additional colorful effects, and longer battery lifetime of a maximum of 80%. The AS1119 LED driver functions over a -40¢ªC to +85¡ÆC temperature range, and it is offered in a 36-pin WL-CSP package. It has an 8-bit analog current control that enables fine tuning of every matrix to counterbalance different brightness levels of different colors. The LED driver includes six memory frames for smaller animations, or for buffer to decrease the host processor load and save processing time and energy. The driver also has a 320 mA on-chip charge pump, which is used when LEDs needs more voltage than supplied by the battery.
The LED driver also features low-power shutdown current, shorted and open LED error detection, and control through a 1 MHz I©÷C interface. Two operational modes are offered by the LED driver-the RGB mode that drives the LEDs in three 5x6 matrix, and the single/bicolor mode that drives the LEDs in two 8x9 matrix.