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參數(shù)資料
| 型號： | AAT3141 |
| 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)： | 1/16頁 |
| 文件大?。?/td> | 481K |
| 代理商： | AAT3141 |
AAT3141
High Efficiency 1X/1.5X/2X Charge Pump
for White LED Applications
P
3141.2004.07.0.91
1
ChargePump
General Description
The AAT3141 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 device produces cur-
rent levels up to 30mA on each of its 4 current
source outputs to drive various arrangements of
LEDs from a 2.7V to 5.5V input. Outputs 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 CP) make the AAT3141 ideally suited
for small battery-powered applications.
Analogic Tech's Advanced Simple Serial Control
(AS
2
Cwire) digital input is used to enable, disable
and set the LED drive current with a 32 level loga-
rithmic scale LED brightness control. The AAT3141
has a thermal management system to protect the
device in the event of a short circuit condition at an
output pin. Built-in soft-start circuitry prevents exces-
sive inrush current during start-up. A high charge
pump switching frequency enables the use of very
small external capacitors. In shutdown mode, the
device disconnects the load from V
IN
and reduces
quiescent current to less than 1μA. The AAT3141 is
available in the very small 12 pin TSOPJW package.
Features
Tri Mode 1x, 1.5x, and 2x Charge Pump for
Maximum Efficiency and V
F
coverage
Drives Low-V
F
& High-V
F
Type LEDs
Up to 4, 30mA Outputs
AS
2
Cwire Independent 3+1 output addressing
32 Position Logarithmic Scale with Digital
Control
Low Noise Constant Frequency Operation
1MHz Switching Frequency
Small Application Circuit
Regulated Output Current
Automatic Soft-Start
V
IN
Range: 2.7V to 5.5V
No Inductors
Iq < 1μA in Shutdown
12 pin TSOPJW package
Applications
White LED Backlighting
White Photo-Flash for DSCs
Color (RGB) Lighting
Programmable Current Sources
Typical Application
C
IN
1
μ
F
V
BATTERY
C
CP
1
μ
F
EN/SET
C1
1
μ
F
C2
1
μ
F
D3
D2
D1
V
IN
CP
C1+
C1-
C2+
C2-
D1
D2
D3
D4
EN/SET
GND
AAT3141
D4
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3141_07 | 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 |
| AAT3141ITP-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 |
| AAT3142 | 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 |
| AAT3142_07 | 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 |
| AAT3142ITP-T1 | 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
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