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參數(shù)資料
| 型號： | AAT3169 |
| 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> | 434K |
| 代理商： | AAT3169 |
General Description
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.
Alow 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.
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 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 V
OUT
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 V
IN
and reduces quiescent cur-
rent to less than 1μA.
The AAT3169 is available in a Pb-free, space-sav-
ing, thermally-enhanced 16-pin 3x4mm TDFN or
4x4mm QFN package.
Features
V
IN
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 I
Q
(65μA) for Single-Channel, Low-
Current Mode
Tri-Mode 1X, 1.5X, and 2X Charge Pump for
Maximum Efficiency and V
F
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
I
Q
<1μA in Shutdown
Thermally-Enhanced TDFN34-16 or
QFN44-16 Package
Applications
Color (RGB) Lighting
Programmable Current Sink
White LED Backlighting
White Photo Flash for Digital Still Cameras
AAT3169
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
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
GND
AAT3169
D6
D6
3169.2006.04.1.0
1
ChargePump
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3169_08 | 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 |
| AAT3169IFO-T1 | 制造商:Skyworks Solutions Inc 功能描述:Voltage Regulators - Switching Regulators 1X/1.5X/2X Charge Pump For WLED Apps 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
| AAT3169ISN-T1 | 制造商:Skyworks Solutions Inc 功能描述:LED Lighting Drivers High Eff 1x/1.5x/2x Mode w/ PWM Control |
| AAT3169ITO-T1 | 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
| AAT3169IWO-T1 | 制造商:Skyworks Solutions Inc 功能描述:Voltage Regulators - Switching Regulators 1x/1.5x/2x H Efficie Chrg Pump,WH LED App 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
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