AS1119
144-LED Cross-Plexing Driver with
320mA Charge-Pump
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 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
•
Excellent PCB real estate vs LED count
•
16.7M full color matrix with white balance
•
Reduces MCU load and increases battery
lifetime
•
Extends battery lifetime while reducing BOM
and increasing ease of use
Features
•
Up to 144LEDs as 2x 8x9 or 3x 5x6
•
8bit PWM per LED and current control per matrix
•
6 frames of memory
•
Internal automatic charge pump
•
1MHz I²C-compatible interface
•
Open and shorted LED error detection
•
144 LEDs in dot matrix
•
Low-power shutdown current
ams Datasheet
[v2-00] 2016-Sep-21
Page 1
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AS1119 −
General Description
•
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
9
9
9
9
CS0..8
2.7V to 5.5V
4.7uF
C1+
1uF
C1-
CS9..17
VCP
2.7V to 5.5V
VDD
2.2uF
4.7uF
C1+
CS0..8
CS9..17
VCP
2.2uF
VDD
AS1119
C2+
1uF
C2-
GND
1uF
C1-
AS1119
C2+
1uF
C2-
GND
SDA
SCL
XRES IRQ
SDA
SCL
XRES IRQ
μP
SDA
SCL
RSTN
IRQ
Page 2
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ams Datasheet
[v2-00] 2016-Sep-21
AS1119 −
Pin Assignments
Pin Assignments
The AS1119 pin assignments are described below:
Figure 4:
Pin Diagram (Top View)
Pin A1
indicator
A1
A2
A3
A4
A5
A6
B6
C6
D6
E6
F6
B1
C1
D1
E1
F1
B2
C2
D2
E2
F2
B3
C3
D3
E3
F3
B4
C4
D4
E4
F4
B5
C5
D5
E5
F5
Figure 5:
Pin Description
Pin Name
V
DD1
, V
DD2
,
V
DD3
VCP
C1-, C1+
C2-, C2+
GND1
GND2
GND3
SDA
SCL
AD0
AD1
Pin Number
A6, E5, E1
F1
B1, C1
A1, D1
B5
F5
A2
C6
D6
C5
D5
Description
Positive Supply Voltage.
Connect to a +2.7V to +5.5V supply. Bypass
this pin with 10μF capacitance to GND1, GND2, GND3.
Charge-Pump Output Voltage.
Connect a 2.2μF capacitor to GND3.
Flying Cap 1.
Connect a 1μF capacitor.
Flying Cap 2.
Connect a 1μF capacitor.
Ground for VDD1.
Used for CS0-CS8
Ground for VDD2.
Used for CS9-CS17
Ground for VDD3.
Used for Charge-Pump.
Serial-Data I/O.
Open drain digital I/O I²C data pin.
Serial-Clock Input.
I²C Address for bit 0.
Put to GND or VDD to set I²C addresses.
I²C Address for bit 1.
Put to GND or VDD to set I²C addresses.
Page 4
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ams Datasheet
[v2-00] 2016-Sep-21
AS1119 −
Pin Assignments
Pin Name
RSTN
SYNC_IN,
SYNC_OUT
IRQ
CS0 - CS8
CS9 - CS17
CS0 - CS5
CS6 - CS11
CS12 - CS17
Pin Number
F6
Description
Reset Input.
Pull this pin to logic low to reset all control registers (set to
default values) and to put the device into power-down. For normal
operation pull this pin to VDD.
Synchronization Clock Input or Output
Interrupt Request.
Open drain digital Output.
B6
E6
A5-A3, B4-B2,
C4-C2
D4-D2, E4-E2,
F4-F2
A5-A3, B4-B2
C4-C2, D4-D2
E4-E2, F4-F2
2 Matrices
3 Matrices
Sinks and Sources
for 72 LEDs each matrix.
Sinks and Sources
for 30 LEDs each matrix.
ams Datasheet
[v2-00] 2016-Sep-21
Page 5
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