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AS1113
50mA, 16-Channel LED Driv e r w i t h D i a g n o s t i c s
1 General Description
2 Key Features
The AS1113 is designed to drive up to 16 LEDs through
a fast serial interface and features 16 output 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 the
device perfectly suited for high-volume 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 global fault status information
during load as well as the detailed temperature/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-
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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 Current
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
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 Assignments
+V LED
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.
SDI
AS1113
SDO
CLK
LD
OEN
REXT
GND
V DD
www.austriamicrosystems.com/LED-Driver-ICs/AS1113
Revision 1.04
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