AS1119,pdf (144 LED driver wit

The AS1119 is a compact LED driver for 144 (90) single LEDs. The devices can be programmed via an I?C compatible interface.

The AS1119 offers two blocks driving each 72 LEDs (3 blocks each 30LEDs) with 1/9 (1/6) cycle rate. The required lines to drive all 144 (90 )LEDs are reduced to 18 by using the cross-plexing feature optimizing space on the PCB. Every block driving 72(30) LEDs can be analog dimmed from 1 to 30mA in 1mA steps.

Additionally each of the 144 (90) LEDs can be dimmed individually with 8-bit allowing 256 steps of linear dimming. To reduce CPU usage up to 6 frames can be stored with individual time delays between frames to play small animations automatically.

The AS1119 operates from 2.7V to 5.5V and includes a 320mA charge-pump to drive also white LEDs. The charge-pump operates in 2:3 and 1:2 mode.

The AS1119 features very low shutdown and operational current.

The device is available in a ultrasmall 36-pin WL-CSP.