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參數(shù)資料
| 型號(hào)： | AAT3158 |
| 廠商： | Advanced Analog Technology,lnc. |
| 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)： | 1/11頁 |
| 文件大?。?/td> | 287K |
| 代理商： | AAT3158 |
General Description
The AAT3158 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 AAT3158 is capable of
driving up to four LED channels at 20mA per chan-
nel from a 2.7V to 5.5V input. The current sinks
may be operated individually or in parallel for driv-
ing higher 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
Control) serial digital input is used to enable, dis-
able, and set current for each LED with 16 settings
down to 50μA. The low current mode supply cur-
rent can be as low as 50μA to save power.
S
2
Cwire
(Simple
Serial
Each output of the AAT3158 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 AAT3158 is available in a Pb-free, space-saving
2.85x3.0mm TSOPJW-12 package.
Features
V
IN
Range: 2.7V to 5.5V
Fully Programmable Current with Single Wire
— 16 Current Levels
— 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 Up to Four LED Channels
No Inductors, Low Noise Operation
1MHz Constant Switching Frequency
Small Application Circuit
Built-In Thermal Protection
Automatic Soft-Start
I
Q
<1μA in Shutdown
2.85x3mm TSOPJW-12 Package
Applications
Color (RGB) Lighting
Programmable Current Sinks
White LED Backlighting
White Photo Flash for Digital Still Cameras
AAT3158
High Efficiency 1X/1.5X/2X Charge Pump
for White LED Applications
Typical Application
2.7V to 5.5V
EN/SET
VIN
EN/SET
C2+
C2-
C1+
C1-
VOUT
D1
D2
D3
GND
AAT3158
C
IN
1μF
C
OUT
1μF
C
1
1μF
C
2
1μF
D1
D2
D3
D4
D4
3158.2006.02.1.0
1
ChargePump
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3158ITP-T1 | 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
| AAT3159 | 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 |
| AAT3159ITO-T1 | 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 |
| AAT3164 | 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 Six-Channel White LED Applications |
| AAT3164IRN-T1 | 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 Six-Channel White LED Applications |
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