1 General Description
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 output
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 (REXT).
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 overtemperature,
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-
pin QFN (5x5mm) package.
If a higher output current is needed, please see the
AS1110 with 100mA drive capability.
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 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
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 panels,
emergency light indicators, and traffic signs.