austriamicrosystems AG AS1121
The AS1121 is a 16-channel, constant current-sink LED driver. Each of the 16 channels can be individually adjusted by 4096-step greyscale PWM brightness control and 64-step constant-current sink (dot correction). The dot correction circuitry adjusts the brightness variations between the AS1121 channels and other LED drivers.| Part No. | AS1121 |
|---|---|
| Datasheet | AS1121 Download |
| Manufacturer |  austriamicrosystems AG |
| Description | 16-Channel LED Driver |
| Buy | Stock & Price |
GENERAL DESCRIPTION
Greyscale control and dot correction circuitry are accessible via the SPI-compatible serial interface. A single external resistor sets the maximum current value of all 16 channels. The open LED detection function indicates a broken or disconnected LED at one or more of the outputs. The overtemperature protectionflag indicates that the device is in an overtemperature condition. An additional power-down pin puts the AS1121 into a 40nA standbymode. The AS1121 is available in a 32-pin TQFN 5x5 mm package. 2 KeyFEATURES
Greyscale PWM Control: 12-Bit (4096 Steps) Dot Correction: 6-Bit (64 Steps) Drive Capability (Constant-Current Sink): 0 to 40mA LED Power Supply Voltage: up to 30V Supply Voltage Range: 3.1V to 3.6V SPI-Compatible Serial Interface Output Delay for controlled Inrush Current (factory set, can be turned off) Factory set rise- and fall-time for EMI improvement PWM Clock Rate: up to 10 MHz Data Transfer Clock Rate: up to 30 MHz CMOS Level I/O DiagnosticFEATURES
32-pin TQFN 5x5 mm Package 3APPLICATIONS
Figure 1.
