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AS1112

更新时间: 2024-01-03 02:28:05
品牌 Logo 应用领域
艾迈斯 - AMSCO 驱动器
页数 文件大小 规格书
2页 116K
描述
16-Channel LED Driver with Dot Correction and Greyscale PWM

AS1112 技术参数

是否无铅:不含铅是否Rohs认证:符合
生命周期:Contact ManufacturerReach Compliance Code:unknown
风险等级:5.62Is Samacsys:N
Base Number Matches:1

AS1112 数据手册

 浏览型号AS1112的Datasheet PDF文件第2页 
Product Brief  
AS1112  
16-Channel LED Driver with Dot Correction and  
Greyscale PWM  
1 General Description  
2 Key Features  
16 Channels  
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 con-  
trol and 64-step constant-current sink (dot correction).  
Greyscale PWM Control: 12-Bit (4096 Steps)  
Dot Correction: 6-Bit (64 Steps)  
The dot correction circuitry adjusts the brightness varia-  
tions between the AS1112 channels and other LED driv-  
ers. Greyscale control and dot correction circuitry are  
accessible via the SPI-compatible serial interface. A sin-  
gle external resistor sets the maximum current value of  
all 16 channels.  
Drive Capability (Constant-Current Sink): 0 to 80mA  
LED Power Supply Voltage: Up to 15V  
Supply Voltage Range: 3.0 to 5.5 V  
SPI-Compatible Serial Interface  
The device features two error detection functions. The  
open & short LED detection function indicates a broken,  
shorted or disconnected LED at one or more of the out-  
puts. The overtemperature flag indicates that the device  
is in an overtemperature condition.  
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  
An additional power-down pin puts the AS1112 into a  
40nA standby-mode.  
The AS1112 is available in a 32-pin TQFN 5x5 mm  
package.  
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.  
Figure 1. Block Diagram  
1
CLK 2 SDI  
32 LD  
29 PD  
Constant Current  
Driver  
Control  
26  
Max OUTn  
Current  
VREF =  
1.24V  
IREF  
4
Greyscale  
Register 11  
12-Bit Greyscale  
PWM Control  
Delay  
x0  
OUT0  
0
24  
Dot Correction  
Register  
6-Bit Dot  
Correction  
Greyscale  
Counter  
GSCLK  
31  
Control  
0
5
Input  
Shift  
Register  
Open&Short LED Detection  
OEN  
Constant Current  
Driver  
Control  
Status  
Open LED Detect,  
Overtemperature  
Flag, Dot  
5
Greyscale  
12 Register 23  
12-Bit Greyscale  
PWM Control  
Delay  
x1  
OUT1  
Correction Data  
Dot Correction  
Register 11  
6-Bit Dot  
Correction  
.
.
.
3
MODE  
27  
6
.
Open&Short LED Detection  
Open  
Thermal  
LED  
.
.
Constant Current  
Driver  
Control  
VCC  
Flag  
Detect  
Input  
Shift  
Register  
21  
Greyscale  
180 Register191  
12-Bit Greyscale  
PWM Control  
Delay  
x15  
OUT15  
Dot Correction  
90 Register 95  
6-Bit Dot  
Correction  
22  
XERR  
30  
Open&Short LED Detection  
23  
AS1112  
GND  
SDO  
www.austriamicrosystems.com  
Revision 1.01  
1 - 2  

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