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AAT3171IWP-T1 PDF预览

AAT3171IWP-T1

更新时间: 2024-02-18 11:56:07
品牌 Logo 应用领域
ANALOGICTECH 驱动程序和接口接口集成电路
页数 文件大小 规格书
19页 389K
描述
High Current, High Efficiency Charge Pump with Auto-Timer

AAT3171IWP-T1 技术参数

生命周期:Obsolete包装说明:,
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.83
接口集成电路类型:LED DISPLAY DRIVERBase Number Matches:1

AAT3171IWP-T1 数据手册

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AAT3171  
High Current, High Efficiency  
Charge Pump with Auto-Timer  
ChargePump  
General Description  
Features  
The AAT3171 is a high output current, high effi-  
ciency, low noise, low profile charge pump DC/DC  
converter. The device is ideal for multi-functional  
LED photo-flash applications where solution cost,  
size, and efficiency are critical.  
Up to 800mA Output Current  
Tri-Mode 1X/1.5X/2X in Current Mode  
16 Current Level Steps Set by S2Cwire  
External RSET to Set Maximum Current  
<1µA of Shutdown  
Small Application Circuit  
No Inductors  
Automatic Soft Start  
12-Pin TDFN 3x3mm Package  
-40°C to +85°C Temperature Range  
The AAT3171 is capable of driving a regulated out-  
put current up to 800mA. Output current levels can  
be easily programmed in 16 steps through  
AnalogicTech's Simple Serial Control™ (S2Cwire™)  
interface controlled by a single microcontroller  
GPIO line. This allows smooth transitions and flexi-  
ble adjustment of brightness in flash or other light-  
ing modes. The maximum output current can also  
be set with an external RSET resistor.  
Applications  
The tri-mode (1X/1.5X/2X) operation of the internal  
charge pump offers excellent power efficiency  
throughout the output current range for both flash  
and movie modes. Combined with a low external  
parts count (two 1µF flying capacitors and two small  
bypass capacitors at VIN and OUT), the AAT3171 is  
ideally suited for small battery-powered applications.  
Camcorders  
Camera Phones  
Digital Still Cameras  
PDAs and Notebook PCs  
Smart Phones  
The AAT3171 has a thermal management system to  
protect the device in the event of a short-circuit con-  
dition at the output pin. Built-in soft-start circuitry pre-  
vents excessive inrush current during start-up. The  
shutdown feature disconnects the load from VIN and  
reduces quiescent current to less than 1µA.  
The AAT3171 is available in a Pb-free, thermally-  
enhanced 12-pin 3x3mm TDFN package and is spec-  
ified over the -40°C to +85°C temperature range.  
Typical Application  
1µF  
1µF  
C1+  
C1- C2+  
C2+  
2.7V  
to 5.5V  
OUT  
VIN  
CIN  
4.7µF  
COUT  
2.2µF  
Flash  
LED  
AAT3171  
EN  
EN/SET  
CT  
FL  
RSET  
GND  
0.1µF  
187K  
3171.2007.03.1.1  
1

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