Austriamicrosystems releases AS1115 LED driver

The AS1115 combines display driving and key scanning, providing a complete front-panel solution that eliminates the use of secondary uP or other logics plus discrete devices, reducing BOM count and cost.

The AS1115 can drive either eight seven-segment digits or 64 individual LEDs with 47mA per digit or 5mA per LED.

An external resistor can easily adjust the current.

The AS1115 features an accuracy of +/- three per cent, which improves picture quality for LED displays by minimising intensity variations between the LEDs and LED modules.

For either global digital brightness control or separate dimming of each single digit, a 4-bit PWM is implemented.

Additionally the AS1115 offers the read back of up to 16-keys, completing the single-chip UI solution.

The AS1115 features built-in LED error detection.

Simple and intuitive to use, the user-friendly software interface allows the error diagnostics to be easily accessed during normal operation.

This solution can detect any open- or short-circuit within the multiplexed 8x8 LED array; a detailed error report can be read out with the exact position of the broken LED, which can reduce test time during production.

The AS1115 helps designers achieve a more efficient and simplified design for front panels, such as those found on set-top boxes, DVD players, washing machines, dryers and microwave ovens.

The AS1115 operates from a single 2.7 to 5.5V supply while requiring the lowest supply current of 0.6mA during operation and 200nA in shutdown mode.

The AS1115 interfaces via IC and up to four devices can be addressed on a single IC bus.

The AS1115 is suitable for operating environments ranging from -40 to +85C and requires a minimum of external components, reducing system costs to a minimum.

The AS1115 comes in a QSOP 24-pin package.

For space-sensitive applications, a TQFN(4x4)-24 package is also available.