The Austrian microelectronics introduces LED driver with control function of the faceplate
A few days ago, Austrian little electronics corporation put out the simple user interface (UI) apt to use LED driver AS1115, have expanded its overall LED driver product mix. AS1115 integration shows driving and the keyboard scans the function, realize the intact faceplate solution, the province goes to & micro; P or other logical circuits and discrete devices, have and then reduced BOM number and cost.
AS1115 can be with 8 7 sections of figures of electric-current driving of the figure 47mA of each one, can also be by the electric-current driving 64 independent LEDs of each LED 5mA. The external resistance can adjust the electric current easily. AS1115 has the outstanding precision of ± 3%, because the intensity difference between driven LED and between LED module is minimum, have improved the image quality on LED display screen greatly. No matter the overall situation digital dimmer control or each one is numberical adjusts luminance independently, adopt 4 PWM mechanisms. In addition, AS1115 offers up to 16 readback functions of key, thus has realized the single chip UI solution.
AS1115 of the little electronics corporation of Austria has a unique function, namely the error detection of built-in LED. The ocular, user friendly software interface simple to use makes error diagnosis realize easily during normal operation. This scheme can detect any open circuit or short trouboe appearing in the multiplexing 8x8 LED array, can also offer the exhaustive error reporting at the same time, and read and damage the concrete position of LED, this has shortened the testing time in the production process greatly.
The standard linear director Bruce Ulrich of department's market of Austrian microelectronics shows: "Because the market competition is very fierce, the consumption electronic product or household electrical appliance manufacturer of today is facing the pressure of lowering costs constantly. Most user interface needs a display unit display information, need key set to carry on mutually. In addition, LED error detection is a very important factor of reducing testing, production and maintenance cost. AS1115 has met all these demands, can help the designer to realize faceplates such as more high-efficient, simpler set-box, DVD broadcaster, washing machine, clothes dryer and microwave oven,etc. are designed. "
The working voltage of AS1115 is 2.7V - 5.5V form power, the power electric current while working is only 0.6mA, it is 200nA to shut off under the mode. AS1115 passes I² C bus connection, a I² C bus line can connect up to 4 devices.
AS1115 applicable operating temperature is - 40-85 degrees of C, need few outside component, can minimize the system cost. To facilitate dealing with, AS1115 adopts QSOP 24 pin to capsulate. Can also offer TQFN(4x4) as to the responsive application of space -24 is capsulated.
