Austria launched 16 channel constant current LED driver

Austria Microelectronics Corporation (austriamicrosystems) recently launched the 16 channel constant current LED driver AS1110. The driver has advanced LED open circuit and short circuit fault diagnosis function. AS1110 on the basis of the success of the AS1109, the number of output channels doubled. AS1110 uses serial interface for error information feedback, without the use of additional PCB lines to diagnose external LED status. LED, director of the standard linear division of microelectronics in Austria, Walter Moshammer said: with the increase in LED display resolution, the market needs to be more precise, packaging smaller drive. In addition, in addition to the application of security related traffic lights, even in the information display or video wall, such as the need to optimize the maintenance costs of commercial applications, LED error detection has gradually become an important factor. Therefore, the use of small package, providing superior performance, first-class accuracy and LED error detection capabilities of the AS1110, to meet the needs of the market."

AS1110 has 16 stable current ports, each port can be applied to a wide range of LED forward voltage drop changes, and to provide a constant current for LED. AS1110 output port can withstand voltage of up to 15V. Through an external resistor, the current can be adjusted in the range of 0.5 to 100mA, which provides great flexibility for LED brightness control. Due to the error between channels is only 3%, and the brightness difference between LED and LED module has completely disappeared, AS1110 further improve the quality of LED display screen.

Like AS1109, AS1110 can be used in multiplex mode, independent LED node that a AS1110 device can drive 64 more. And in the multiplexing mode, AS1110 can still achieve one hundred percent error detection function.

Another feature of AS1110 LED built-in error detection function. This feature is simple and intuitive, and can be operated even when the driver is working, without switching to an independent detection mode. This makes the software interface easier to use, the detection is also very fast. AS1110 can detect any open circuit, short circuit and overheating. When the device is in the process of the above error, the global error mark can be output through the serial port, so that the errors can be detected quickly, quickly and accurately. In addition, the specific location of the LED damage can be read from the detailed error report.

To prevent the occurrence of LED display in the error detection process flashing, Austria microelectronics company also launched a unique model of low current diagnosis. In this mode, the display will use only 0.6mA of the test current in a short time. Therefore, the LED test is not obvious, you can use the function in the normal operation of the driver.

30MHz serial interface fast can ensure the high refresh rate, even for large LED display module. AS1110 is suitable for the working environment between -40 and +85 DEG C, which is an ideal choice for industrial and outdoor applications. The device uses a 24 pin SSOP-150 and a small, 28 pin QFN (5 x 5mm) package, the pixel spacing is very small, very suitable for indoor LED display.