Constant Current LED Driver features 16 channels.
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Press Release Summary:
AS1110 16-channel LED driver has LED error detection that can be invoked during normal operation. It employs low-current diagnostic mode that applies test current of 0.6 mA to display, with serial data input/output lines providing error information readback. Output ports can withstand up to 15 V, and with external resistor currents can be adjusted from 0.5-100 mA for controlling brightness. Accuracy is ±3% between channels, and device can drive up to 64 independent LED nodes.
Original Press Release:
Austriamicrosystems Unveils 16-Channel Constant Current LED Drivers with Innovative Diagnostics Function
Unterpremstaetten, Austria (February 21, 2007) - austriamicrosystems (SWX: AMS), a leading global designer
and manufacturer of analog integrated circuits (ICs) for communication, industrial, medical and automotive
applications, introduces the AS1110 16-channel constant current LED driver with advanced error diagnostics for
open and shorted LEDs. The AS1110 follows the successful AS1109 while doubling the output channels. The
AS1110 uses the serial data input/output lines for the error information readback so that no additional PCB tracks
are needed for LED error diagnostics.
"As the resolution of LED displays increases, the market is demanding more accurate LED drivers in smaller
packages that are able to drive a large number of LEDs. Additionally, LED error detection is becoming a very
important factor, not only for security related applications like traffic signs, but also for commercial applications
such as information displays or video walls, in order to optimize maintenance cost," said Walter Moshammer,
Director Marketing Standard Linear at austriamicrosystems. "Housed in a small package and offering extremely
high performance, as well as best-in-class accuracy with LED error detection, the AS1110 addresses these
market demands."
The AS1110 features sixteen regulated ports that provide constant current for driving LEDs within a wide range of
forward voltage variations. The AS1110 output ports are guaranteed to endure a maximum voltage of 15V.
Through an external resistor the currents can be adjusted from 0.5 to 100mA which gives the utmost flexibility in
controlling LED brightness. With an excellent accuracy of ±3% between channels, the AS1110 improves picture
quality of LED displays since intensity variations between LEDs and LED modules completely disappear.
The AS1110, as the AS1109, can be used in multiplexed mode, meaning that a single AS1110 can drive up to 64
independent LED nodes. In this multiplexed mode the AS1110 still maintains the full functionality of the error
detection.
Another highlight of the AS1110 is the built-in LED error detection. Easy and intuitive to use, it can be invoked
during normal operation without switching into a separate detection mode. This makes the software interface
even more user-friendly while detection can be done extremely fast. The AS1110 can detect any open- or shortcircuit
as well as an over-temperature occurrence. For immediate detection of those errors, a global error flag is
available at serial data output, detecting any of those errors quickly and precisely. Furthermore, a detailed error
report can be produced with the exact position of the broken LED.
In order to avoid the typical flickering of LED displays during error detection, austriamicrosystems has introduced
the Low-Current Diagnostic mode. In this mode, a small test current of only 0.6mA is applied to the display for a
very short time. As a result, LED testing is not visible and can therefore be applied during normal operation.
The fast 30MHz serial interface ensures high refreshing rates even for huge LED display modules. With an
operating temperature range from -40 to +85°C, the AS1110 is also ideal for industrial and outdoor applications.
The AS1110 is available in a 24-pin SSOP-150 and a small 28-pin QFN (5x5mm) package, allowing a very small
pitch between LED pixels which is ideal for indoor LED displays.
More product specific information can be downloaded from the austriamicrosystems website at
http://austriamicrosystems.com/03products/products_detail/AS1110/description_AS1110.htm
About austriamicrosystems
austriamicrosystems is a leading designer and manufacturer of high performance analog ICs, combining more
than 25 years of analog design capabilities and system know-how with its own state-of-the-art manufacturing and
test facilities. austriamicrosystems leverages its expertise in low power and high accuracy to provide industryleading
customized and standard analog products. Operating worldwide with more than 1,000 employees,
austriamicrosystems focuses on the areas of power management, sensors & sensor interfaces, portable audio
and car access in its markets Communications, Industry & Medical and Automotive, complemented by its Full
Service Foundry activities. austriamicrosystems is listed on the SWX Swiss Exchange in Zurich (ticker symbol:
AMS). For more information, please visit the web site at www.austriamicrosystems.com.
For further information:
Technical Contact
austriamicrosystems AG
Manfred Kogler
Marketing Manager Standard Linear
Tel: +43 (0) 3136 500 5274
Fax: +43 (0) 3136 500 5420
manfred.kogler@austriamicrosystems.com
www.austriamicrosystems.com
