AS1119-BWLT ams

AS1119 144-LED Cross-Plexing Driver with 320mA Charge-Pump The AS1119 is a compact LED driver for 144 (90) single LEDs. General Description The devices can be programmed via an IC 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 256 steps (8 bit). 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. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of the AS1119, 144-LED Cross-Plexing Driver with 320mA Charge-Pump are listed below: Figure 1: Added Value of Using AS1119 Benefits Features Excellent PCB real estate vs LED count Up to 144LEDs as 2x 8x9 or 3x 5x6 16.7M full color matrix with white balance 8bit PWM per LED and current control per matrix Reduces MCU load and increases battery 6 frames of memory lifetime Extends battery lifetime while reducing BOM Internal automatic charge pump and increasing ease of use 1MHz IC-compatible interface Open and shorted LED error detection 144 LEDs in dot matrix Low-power shutdown current ams Datasheet Page 1 v2-00 2016-Sep-21 Document FeedbackAS11 19 G e n e ral D e sc r i ption Individual 8-bit LED PWM control 8-bit analog brightness control (1:1), 2:3, 1:2 320mA charge pump 6 frames memory for animations System-clk synchronisation for multiple devices Supply voltage range: 2.7V to 5.5V Minimum PCB space required 36-pin WL-CSP package Applications The AS1119 is ideal for dot matrix displays in mobile phones, personal electronics and toys. Figure 2: Typical Application Diagram 99 99 CS0..8 CS9..17 CS0..8 CS9..17 2.7V to 5.5V VDD 2.7V to 5.5V VDD VCP VCP 4.7uF 4.7uF 2.2uF 2.2uF C1+ C2+ C1+ C2+ AS1119 AS1119 1uF 1uF 1uF 1uF C1- C2- C1- C2- GND GND SDA SCL XRES IRQ SDA SCL XRES IRQ SDA SCL P RSTN IRQ Page 2 ams Datasheet Document Feedback v2-00 2016-Sep-21