Datasheet
A S1119
144-LED Cross-Plexing Driver with 320mA Charge-Pump
1 General Description
The AS1119 is a compact LED driver for 144 (90) single LEDs. The
devices can be programmed via an I²C 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 opti-
mizing 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.
2 Key Features
1MHz I²C-Compatible Interface
Open and Shorted LED Error Detection
144 LEDs in Dot Matrix
Low-Power Shutdown Current
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
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.
Figure 1. AS1119 - Typical Application Diagram
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Supply Voltage Range: 2.7V to 5.5V
Minimum PCB space required
36-pin WL-CSP
package
System-clk synchronisation for multiple devices
3 Applications
The AS1119 is ideal for dot matrix displays in mobile phones, per-
sonal electronic and toys.
9
9
9
9
V
DD
4.7µF
2.7V to 5.5V
4.7µF
VCP
V
DD
2.2µF 4.7µF
1µF
AS1119
1µF
1µF
AS1119
SDA
SCL
RSTN
µP
Revision 1.04
lv
VCP
2.2µF
1µF
al
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AMSCO [ AUSTRIAMICROSYSTEMS AG ]
