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AS1122 - 12-Channel LED Driver

General Description

The AS1122 is a 12-channel, constant current-sink LED driver.

Each of the 12 channels can be individually adjusted by 4096-step greyscale PWM brightness control and 64-step constant-current sink (dot correction).

Key Features

  • 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: 2.7V to 3.6V Output Delay for controlled Inrush Current (factory set, can be turned off) Factory set rise- and fall-time for EMI improvement Internal PWM Clock: 10 MHz (typ) Data Transfer Clock Rate: up to 5 MHz CMOS Level I/O Diagnostic Features 24-pin QFN 4x4mm Package 3.

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Datasheet Details

Part number AS1122
Manufacturer austriamicrosystems AG
File Size 1.70 MB
Description 12-Channel LED Driver
Datasheet download datasheet AS1122 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Technical coantmesntAsGtill valid Datasheet AS1122 12-Channel LED Driver with Dot Correction and Greyscale PWM 1 General Description The AS1122 is a 12-channel, constant current-sink LED driver. Each of the 12 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 AS1122 channels and other LED drivers. Greyscale control and dot correction circuitry are accessible via a simple SPI-compatible serial interface. The open LED detection function indicates a broken or disconnected LED at one or more of the outputs. The overtemperature flag indicates that the device is in an overtemperature condition.