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The AS1110 LED driver is a 16-channel, constant-current driver that integrates error diagnostic modes for
detecting open and shorted LEDs (see figure). AUSTRIAMICROSYSTEMS USA INC., Raleigh, NC. (919) 676-5292.
MORE INFO:
The device employs the serial data input/output lines for error information
read back, eliminating the need for PCB tracks for diagnostics. Its 16 regulated ports provide constant current within a wide range of forward voltage variations, and the output ports can endure a maximum voltage of
15V. Via an external resistor, current levels are adjustable from 0.5 mA to
100 mA. Accuracy is ±3% between channels. The driver can be used in
multiplexed mode to drive up to 64 independent LED nodes while maintaining full functionality of the error detection modes. Other features
include an operating temperature range from -40˚C to +85°C and a 30MHz serial interface that ensures high refreshing rates even for huge LED
display modules. The AS1110 is available in a 24-pin SSOP-150 and a
28-pin QFN package.
MORE ABOUT AS1110
LED ERROR DETECTION
Claimed as easy and intuitive to use, the LED error
detection of the AS1110 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
device can detect any open- or short-circuit 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, the company has introduced the Low-Current Diagnostic mode. In this mode, a small test current of only 0.6 mA 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.
PRICE AND AVAILABILITY
The AS1110 is priced at $ 1.59 each/1,000.
Samples are currently available and volume production
is scheduled for March 2007.
ON THE WEB
More product specific information can be downloaded
from the austriamicrosystems website at www.austriamicrosystems.com/03products/products_detail/AS1110/AS1110.htm
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Company: AUSTRIAMICROSYSTEMS
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