1 General Description
The AS1112 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 AS1112 channels and other LED drivers. 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 & short LED detection function indicates a broken, shorted
or disconnected LED at one or more of the outputs. The overtemperature
flag indicates that the device is in an overtemperature condition.
2 Key Features

16 Channels

Greyscale PWM Control: 12-Bit (4096 Steps)

Dot Correction: 6-Bit (64 Steps)

Drive Capability (Constant-Current Sink): 0 to 100mA

LED Power Supply Voltage: Up to 15V

Supply Voltage Range: 3.0 to 5.5 V

SPI-Compatible Serial Interface

Controlled In-Rush Current

Data Transfer & PWM Clock Rate: up to 30 MHz

CMOS Level I/O

Diagnostic Features
- LED Open/Short Detection
- Overtemperature Flag

32-pin TQFN 5x5 mm Package
3 Applications
The device is ideal for mono-, multi-, and full-color LED displays,
LED signboards, and display backlights.