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A S11 22
1 2- C h a n n e l L E D D ri v er w it h D o t Co rr e c ti o n a n d G r ey s c a le P W M
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 indi-
cates that the device is in an overtemperature condition.
A single external resistor sets the maximum current value of all 12
channels.
The AS1122 is available in a 24-pin QFN 4x4mm package.
2 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 Applications
The device is ideal for mono-, multi-, and full-color LED displays,
LED signboards, and display backlights.
Figure 1. AS1122 - Typical Application Diagram
www.austriamicrosystems.com/LED-Driver-ICs
Revision 1.00
1 - 22
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相关代理商/技术参数
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AS1122-BQFT 功能描述:IC LED DVR 12-CH W/DELAY 24-TQFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C
AS1122-XXX-I-A1-D 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter
AS1122-XXX-I-A1-S 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter
AS1122-XXX-I-A2-D 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter
AS1122-XXX-I-A2-S 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter
AS1122-XXX-I-A3-D 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter
AS1122-XXX-I-A3-S 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter