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AAT2847IML-QI-T1 PDF预览

AAT2847IML-QI-T1

更新时间： 2024-02-15 22:04:06
品牌 Logo 应用领域
ANALOGICTECH 驱动器驱动程序和接口接口集成电路
页数 文件大小 规格书
20页 382K
描述
Four-Channel Backlight Driver with Dual LDOs

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AAT2847IML-QI-T1 技术参数

生命周期：Active包装说明：,
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.69
接口集成电路类型：LED DISPLAY DRIVERBase Number Matches：1

AAT2847IML-QI-T1 数据手册

 浏览型号AAT2847IML-QI-T1的Datasheet PDF文件第2页浏览型号AAT2847IML-QI-T1的Datasheet PDF文件第3页浏览型号AAT2847IML-QI-T1的Datasheet PDF文件第4页浏览型号AAT2847IML-QI-T1的Datasheet PDF文件第5页浏览型号AAT2847IML-QI-T1的Datasheet PDF文件第6页浏览型号AAT2847IML-QI-T1的Datasheet PDF文件第7页 
AAT2847  
Four-Channel Backlight Driver with Dual LDOs  
™
ChargePump  
General Description  
Features  
The AAT2847 is a highly integrated power solution  
for single cell Li-Ion/Polymer based liquid crystal  
display (LCD) display applications. It includes a  
four channel light emitting diode (LED) backlight  
driver and two integrated 200mA low dropout volt-  
age regulators (LDOs) as additional power sup-  
plies for display and camera related chipsets.  
•
•
Input Supply Voltage Range: 2.7V to 5.5V  
Tri-Mode (1X/1.5X/2X) Charge Pump:  
— Delivers up to 120mA of Output Current  
Integrated LCD Display Solution:  
•
— Four-Channel WLED Backlight  
•
User-Programmable WLED Current  
Scales: 30mA, 20mA and 15mA.  
— Sixteen Programmable Current  
Level Settings  
User Selectable Low Level Current Scale  
— Four Programmable Current  
Level Settings  
The backlight driver in the AAT2847 is a low noise  
tri-mode DC/DC charge pump converter. Each of  
the four channels of the backlight driver is capable  
of delivering up to 20mA of bias currents for white  
LEDs. The white LED (WLED) backlight bias cur-  
rent matching is 1% which helps provide uniform  
display brightness.  
•
— Dual 200mA LDOs (w/Separate Enables)  
2
•
Single-Wire AS Cwire Serial Interface for  
Configuration/Control  
2
AnalogicTech’s AS Cwire™ (Advanced Simple  
— Four Addressable Registers  
— Fast, 1MHz Serial Interface  
> 90% Peak Efficiency  
Serial Control™) serial digital interface is used to  
enable, disable, and set the current for each back-  
light LED channel. Each LED channel has sixteen  
available current level settings in three separate  
current scales, plus four available current level set-  
tings on a low level current scale.  
•
•
LDO Output Voltages:  
— AAT2847-EE: User-Programmable  
— AAT2847-QG: 2.8V and 1.5V  
— AAT2847-QI: 2.8V and 1.8V  
Over-Temperature Protection  
Available in 3x4x0.75mm TQFN34-20 Package  
-40°C to +85°C Temperature Range  
•
•
•
Each LED channel is equipped with built-in short  
circuit protection and auto disable functionality. A  
low shutdown current feature disconnects the load  
from the input and reduces quiescent current to  
less than 1µA.  
Applications  
The AAT2847 is available in the thermally  
enhanced 20-pin 3x4x0.75mm TQFN package.  
•
•
•
•
Camera Function Power Supplies  
Camera Phone Displays  
LCD Modules  
White LED Backlighting  
Typical Application  
C1  
1μF  
C2  
1μF  
C1  
1μF  
C2  
1μF  
C1- C1+ C2- C2+  
OUT  
C1- C1+ C2- C2+  
OUT  
WLEDs  
WLEDs  
OSRAM LW M673  
OSRAM LW M673  
or equivalent  
COUT  
1μF  
or equivalent  
COUT  
1μF  
IN  
IN  
AAT 2847-EE  
AAT2847-QI  
VBAT  
3.6V  
D1  
D2  
D3  
D4  
VBAT  
3.6V  
D1  
D2  
D3  
D4  
CIN  
2.2μF  
CIN  
2.2μF  
200mA  
VOUTA  
IN  
LDOA  
IN  
LDOA  
2.8V, 200mA  
CLDOA  
2.2μF  
AS2Cwire  
Backlight control  
CLDOA  
2.2μF  
EN/SET  
FBA  
AS2Cwire  
EN/SET  
ENA  
ENB  
LDO A Enable  
LDO B Enable  
Backlight Control  
LDO A Enable  
LDO B Enable  
200mA  
VOUTB  
1.8V, 200mA  
LDOB  
PGND  
LDOB  
ENA  
ENB  
CLDOB  
2.2μF  
CLDOB  
2.2μF  
GND  
FBB  
GND  
PGND  
2847.2007.09.1.0  
1
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