AAT3169ISN-T1 PDF预览

AAT3169ISN-T1

更新时间: 2025-07-14 03:05:39
品牌 Logo 应用领域
ANALOGICTECH
页数 文件大小 规格书
14页 421K
描述
High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications

AAT3169ISN-T1 数据手册

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AAT3169  
High Efficiency 1X/1.5X/2X Charge  
Pump for White LED Applications  
ChargePump  
General Description  
Features  
The AAT3169 is a low noise, constant frequency  
charge pump DC/DC converter that uses a tri-mode  
load switch (1X), fractional (1.5X), and doubling  
(2X) conversion to maximize efficiency for white  
LED applications. The AAT3169 is capable of driv-  
ing six LEDs for a total of 180mA from a 2.7V to  
5.5V input. The current sinks may be operated indi-  
vidually or in parallel for driving higher current LEDs.  
A low external parts count (two 1µF flying capacitors  
and two small 1µF capacitors at VIN and VOUT)  
make this part ideally suited for small, battery-pow-  
ered applications.  
VIN Range: 2.7V to 5.5V  
Fully Programmable Current with Single Wire  
— 16-Step Logarithmic Scale  
— 20/30/15mA Max Current  
— Four Low-Current Settings Down to 115µA  
— Low IQ (65µA) for Single-Channel, Low-  
Current Mode  
Tri-Mode 1X, 1.5X, and 2X Charge Pump for  
Maximum Efficiency and VF Coverage  
Drives Up to Six LEDs  
Individual Main-Sub (5-1) Group Control  
No Inductors, Low Noise Operation  
1MHz Constant Switching Frequency  
Small Application Circuit  
Built-In Thermal Protection  
Built-In Auto-Disable for Open Circuit  
Automatic Soft Start  
IQ <1µA in Shutdown  
Thermally-Enhanced TDFN34-16 or  
QFN44-16 Package  
AnalogicTech's AS2Cwire™ (Advanced Simple  
Serial Control™) serial digital input is used to  
enable, disable, and set current for each LED with  
a 16-level logarithmic scale plus four low-current  
settings down to 115µA. For optimized efficiency,  
low-current settings require only 65µA of house-  
keeping current.  
Each output of the AAT3169 is equipped with built-  
in protection for VOUT short-circuit and auto-disable  
for load short-circuit conditions. Built-in soft-start  
circuitry prevents excessive inrush current during  
start-up. A low-current shutdown feature discon-  
nects the load from VIN and reduces quiescent cur-  
rent to less than 1µA.  
Applications  
Color (RGB) Lighting  
Programmable Current Sink  
White LED Backlighting  
The AAT3169 is available in a Pb-free, space-sav-  
ing, thermally-enhanced 16-pin 3x4mm TDFN or  
4x4mm QFN package.  
White Photo Flash for Digital Still Cameras  
Typical Application  
C1+  
C2+  
C1  
C2  
1μF  
1μF  
C1-  
C2-  
VIN  
VOUT  
2.7V to 5.5V  
COUT  
1μF  
CIN  
1μF  
D1  
D2  
D3  
D4  
D5  
D6  
AAT3169  
GND  
D1  
D2  
D3  
EN/SET  
EN/SET  
D4  
D5  
D6  
3169.2006.04.1.0  
1

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