AS1113
50mA, 16-Channel LED Driver with Diagnostics
Datasheet
www.austriamicrosystems.com Revision 1.03 1 - 24
1 General Description
The AS1113 is designed to drive up to 16 LEDs through
a fast serial interface and features 16 outp ut constant
current drivers and an on-chip diagnostic read-back
function.
The high clock-frequency (up to 50MHz), adjustable out-
put current, and flexible serial interface makes th e
device perfectly suited for hi gh -vo l ume transmission
applications.
Output current is adjustable (up to 50mA/channel) using
an external resistor (R
EXT).
The serial interface with Schmitt trigger inputs includes
an integrated shift register. Additionally, an internal data
register stores the currently displayed data.
The device features integrated diagnostics for over-
temperature, open-LED, and shorted-LED conditions.
Integrated registers store glob al fault status information
during load as well as the detailed te mperature/open-
LED/shorted-LED diagnostics results.
The AS1113 also features a low-current diagnostic
mode to minimize display flicker during fault testing.
The AS1113 is available in a 24-pin SSOP and the 28-
pin QFN (5x5mm) package.
If a higher output current is needed, please see the
AS1110 with 100mA drive capability.
Figure 1. Main Diagram and Pin Assi gnments
2 Key Features
! 16 Constant-Current Output Channels
! Excellent Output Current Accuracy
- Between Channels: <±3%
- Between Devices: <±6%
! Output Current Per Channel: 0.5 to 50mA
! Controlled In-Rush Curren t
! Over-Temperature, Open-LED, Shorted-LED
Diagnostic Functions
! Low-Current Test Mode
! Global Fault Monitoring
! Low Shutdown Mode Current: 10µA
! Fast Serial Interface: 50MHz
! Cascaded Configuration
! Extremely Fast Output Drivers Suitable for PWM
! 24-pin SSOP and 28-pin QFN (5x5mm) Package
3 Applications
The device is ideal for fixed- or slow-rolling displays
using static or multiplexed LED matrix and dimming
functions, large LED matrix displays, mixed LED display
and switch monitoring, displays in elevators, public
transports (underground, trains, buses, taxis, airplanes,
etc.), large displays in stadiums and public areas, price
indicators in retail stores, promotional panels, bar-graph
displays, industrial controller displays, white good pan-
els, emergency light indicators, and traffic signs.
AS1113
SDI SDO
CLK LD OEN REXT
+V
LED
OUTN3
OUTN4
OUTN5
OUTN6
OUTN7
OUTN8
OUTN9
OUTN10
GND
VDD
OUTN0
OUTN1
OUTN2
OUTN11
OUTN12
OUTN13
OUTN14
OUTN15
