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參數(shù)資料
| 型號： | AAT3156 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
| 中文描述： | 高效率1x/1.5x/2x電荷泵白光LED應(yīng)用 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 333K |
| 代理商： | AAT3156 |
General Description
The AAT3156 is a low noise, constant frequency
charge pump DC/DC converter that uses a tri-
mode load switch (1X), fractional (1.5X), and dou-
bling (2X) conversion to maximize efficiency for
white LED applications. The AAT3156 is capable of
driving six-channel LEDs at a total of 180mA from
a 2.7V to 5.5V input. The current sinks may be
operated individually or in parallel for driving high-
er-current LEDs. A low external parts count (two
1μF flying capacitors and two small 1μF capacitors
at V
IN
and V
OUT
) make this part ideally suited for
small battery-powered applications.
AnalogicTech's AS
2
Cwire (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 50μA for optimized efficiency, with
a low housekeeping current of only 50μA.
Each output of the AAT3156 is equipped with built-
in protection for V
OUT
short circuit and auto disable
for LED failure condition. Built-in soft-start circuitry
prevents excessive inrush current during start-up.
A low current shutdown feature disconnects the
load from V
IN
and reduces quiescent current to less
than 1μA.
The AAT3156 is available in a space-saving, ther-
mally-enhanced 16-pin 4x4mm QFN package.
Features
V
IN
Range: 2.7V to 5.5V
Fully Programmable Current with Single Wire
— 16-Step Logarithmic Scale
— 15/20/30mA Max Current
— Four Low Current Settings Down to 50μA
— Low I
Q
(50μA) for Low Current Mode
Tri-Mode 1X, 1.5X, and 2X Charge Pump for
Maximum Efficiency and V
F
Coverage
Drives Six Channels of LEDs
Individual Main/Sub-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
I
Q
<1μA in Shutdown
Thermally-Enhanced QFN44-16 Package
Applications
Color (RGB) Lighting
Programmable Current Sinks
White LED Backlighting
White Photo Flash for DSCs
AAT3156
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Applications
Typical Application
C1
1
μ
F
C2
1
μ
F
D1
D2
D3
D4
D5
D6
C
OUT
1
μ
F
C
IN
1
μ
F
2.7V to 5.5V
EN/SET
VIN
EN/SET
C1+
C1-
C2+
C2-
VOUT
D1
D2
D3
D4
D5
D6
GND
AAT3156
3156.2005.06.1.1
1
ChargePump
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3156_05 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
| AAT3156ISN-T1 | 制造商:Skyworks Solutions Inc 功能描述:1X,1.5X,2X WLED CHPMP 16QFN TR 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
| AAT3157 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
| AAT3157ITP-T1 | 制造商:Skyworks Solutions Inc 功能描述:IC LED DRVR BCKLGHT FLASH 12TSOP 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
| AAT3158 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications |
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