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AAT2846INJ-EE-T1

更新时间： 2024-02-24 06:45:52
品牌 Logo 应用领域
ANALOGICTECH 驱动程序和接口接口集成电路泵
页数 文件大小 规格书
25页 646K
描述
High Current Charge Pump with Dual LDO for Backlight and Flash Applications

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AAT2846INJ-EE-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：5.76
接口集成电路类型：LED DISPLAY DRIVERBase Number Matches：1

AAT2846INJ-EE-T1 数据手册

 浏览型号AAT2846INJ-EE-T1的Datasheet PDF文件第2页浏览型号AAT2846INJ-EE-T1的Datasheet PDF文件第3页浏览型号AAT2846INJ-EE-T1的Datasheet PDF文件第4页浏览型号AAT2846INJ-EE-T1的Datasheet PDF文件第5页浏览型号AAT2846INJ-EE-T1的Datasheet PDF文件第6页浏览型号AAT2846INJ-EE-T1的Datasheet PDF文件第7页 
AAT2846  
High Current Charge Pump with Dual LDO  
for Backlight and Flash Applications  
™
ChargePump  
General Description  
Features  
The AAT2846 is a highly integrated charge pump  
with dual linear regulators optimized for systems  
powered from lithium-ion/polymer batteries. The  
charge pump provides power for both white LED  
backlight and flash. Six backlight LEDs can be driv-  
en at up to 30mA each, while up to two flash LEDs  
can be driven at up to 600mA total. AnalogicTech's  
•
•
Input Voltage Range: 2.7V to 5.5V  
Tri-Mode Charge Pump:  
— Drives up to Six Backlight LEDs and Two  
Flash LEDs  
— 32 Programmable Backlight Current  
Settings Ranging from 95µA to 30mA  
— 16 Programmable Flash Current Settings  
— Maximum Flash LED Current  
Programmable using External Resistor  
— 2MHz Switching Frequency  
Two Linear Regulators:  
— 200mA Output Current  
— 200mV Dropout Voltage  
— Output Voltage Adjustable from 1.2V to  
VBATTERY  
— Output Auto-Discharge for Fast Shutdown  
— Individual LDO Enable Inputs  
Built-In Thermal Protection  
Automatic Soft Start  
-40°C to +85°C Temperature Range  
TQFN44-28 Package  
2
AS Cwire™ (Advanced Simple Serial Control™) sin-  
gle-wire interface is used to enable, disable, and set  
the current to one of 32 levels for the backlight and  
one of 16 levels for the flash. An external resistor sets  
the maximum flash current. Backlight current match-  
ing is 1% for uniform display brightness, and flash  
current matching is 4% for uniform power dissipation.  
•
The AAT2846 offers two high-performance low-  
noise MicroPower™ low dropout (LDO) linear regu-  
lators. Both regulators use individual enable inputs  
and each will supply up to 200mA load current. LDO  
ground pin current is only 80µA, making the  
AAT2846 ideal for battery-operated applications.  
•
•
•
•
The AAT2846 is equipped with built-in short-circuit  
and over-temperature protection. The soft start cir-  
cuitry prevents excessive inrush current at start-up  
and mode transitions.  
Applications  
The AAT2846 is available in a Pb-free TQFN44-28  
package and operates over the -40°C to +85°C  
ambient temperature range.  
•
•
•
Camera-Enabled Mobile Devices  
Digital Still Cameras  
Multimedia Mobile Phones  
Typical Application  
C1  
1μF  
C2  
1μF  
C1+  
C1- C2+  
C2-  
VOUT  
IN  
OUT  
COUT  
2.2μF  
CIN  
4.7μF  
VBAT  
IN  
AAT2846  
BL1  
BL2  
BL3  
BL4  
BL5  
BL6  
FL1  
FL2  
ENABLE/SET  
ENS  
FEN  
EN_FLASH  
CT  
CT  
0.1μF  
FSET  
RFSET  
280k  
OUTA  
VOUT LDOA  
REF  
R2A  
R1A  
COUTA  
CBYP  
0.1μF  
FBA  
VOUT LDOB  
COUTB  
OUTB  
FBB  
ENA  
ENB  
EN_LDOA  
EN_LDOB  
R2B  
R1B  
AGND PGND  
2846.2007.08.1.0  
1
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