AS1116 LED Driver IC

Description

The AS1116 is a compact LED driver for 64 single LEDs or 8 digits of 7-segments. The devices can be programmed via an SPI compatible 3-wire interface.

Every segment can be individually addressed and updated separately. Only one external resistor (RSET) is required to set the current. LED brightness can be controlled by analog or digital means.

The devices include an integrated BCD code-B/HEX decoder, multiplex scan circuitry, segment and display drivers, and a 64-bit memory. Internal memory stores the shift register settings, eliminating the need for continuous device reprogramming.

Additionally the AS1116 offers a diagnostic mode for easy and fast production testing and allows the use of the AS1116 for critical applications. The diagnostic allows to detect individual open or shorted LEDs.

The AS1116 features a low shutdown current of typically 200nA, and an operational current of typically 350μA. The number of digits can be programmed, the devices can be reset by software, and an external clock is also supported.

The device is available in a QSOP-24 and TQFN(4x4)-24 package.

Key Features

• 10MHz SPI-Compatible Interface
• Open and Shorted LED Error Detection
  • Global or Individual Error Detection
• Hexadecimal- or BCD-Code for 7-Segment Displays
• 200nA Low-Power Shutdown Current (typ; data retained)
• Individual Digit Brightness Control
• Digital and Analog Brightness Control
• Display Blanked on Power-Up
• Drive Common-Cathode LED Displays
• Supply Voltage Range: 2.7V to 5.5V
• Software Reset
• Optional External Clock
• Package:
  • QSOP-24 and TQFN(4x4)-24

Applications

The AS1116 is ideal for seven-segment or dot matrix displays in public information displays at subway, train or bus stations, at airports and also at displays in public transportation like buses or trains, mobile phones, personal electronics and toys.

Block Diagram