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參數(shù)資料
| 型號： | AAT3131ITP-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications |
| 中文描述： | 高效率電荷泵分?jǐn)?shù)電荷泵白光LED應(yīng)用 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大小： | 329K |
| 代理商： | AAT3131ITP-T1 |
AAT3131
High Efficiency 1X/1.5X Fractional
Charge Pump for White LED Applications
3131.2004.08.1.1
1
ChargePump
General Description
The AAT3131 is a low noise, constant frequency
charge pump DC/DC converter that uses a dual
mode Load Switch (1X) and fractional (1.5X) con-
version to maximize efficiency for White LED appli-
cations. The device can be used to produce cur-
rent levels up to 20mA in three of its outputs, and
30mA in one of its outputs to drive LEDs from a
2.7V to 5.5V input. Outputs may be operated indi-
vidually or paralleled for driving higher-current
LEDs. Low external parts counts (two 1μF flying
capacitors and two small 1μF capacitors at V
IN
,
and OUT) make the AAT3131 ideally suited for
small battery-powered applications.
AnalogicTech's
(S
2
Cwire) interface is used to enable, disable
and set the LED drive current in two groups: the
three 20mA outputs and the single 30mA output
with multiple level logarithmic scales. The AAT3131
has a thermal management system to protect the
device in the event of a short circuit condition at the
output pin. Built-in soft-start circuitry prevents
excessive inrush current during start-up. A high
charge pump switching frequency enables the use
of very small external capacitors. A low current
shutdown feature disconnects the load from V
IN
and reduces quiescent current to less than 1μA.
The AAT3131 is available in very small 12 pin
TSOPJW12 package.
Simple
Serial
Control
Features
V
IN
Range: 2.7 - 5.5 Volts
< 1.0μA of Shutdown current
1.0 MHz Switching Frequency
White LED Backlighting
Fully Independent Display Lighting
Dual Mode 1x and 1.5x Charge Pump for
Maximum Efficiency
Drives Low-V
F
& High-V
F
f Type LED's
Up to three 20mA Outputs
Single 30 mA Output
Multi Position Logarithmic Scale with Digital
Control
Low Noise Constant Frequency Operation
Regulated Output Current
Automatic Soft-Start
No Inductors
-40 to +85°C Temperature Range
12 pin TSOPJW-12 package
Applications
White LED Backlighting
White Photo-Flash for DSC's
Color (RGB) Lighting
Programmable Current Source
Typical Application
C
IN
1
μ
F
V
BATTERY
C
OUT
1
μ
F
EN/SET
C1
1
μ
F
C2
1
μ
F
D5
D3
D2
D1
V
IN
V
OUT
C1+
C1-
C2+
C2-
D1
D2
D3
D4
EN/SET
GND
AAT3131
D4
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT3132 | High Efficiency 1.5X Fractional Charge Pump for White LED Applications |
| AAT3132A | High Efficiency 1.5X Fractional Charge Pump for White LED Applications |
| AAT3132AITP-1-T1 | High Efficiency 1.5X Fractional Charge Pump for White LED Applications |
| AAT3132ITP-1-T1 | High Efficiency 1.5X Fractional Charge Pump for White LED Applications |
| AAT3132ITP-T1 | High Efficiency 1.5X Fractional Charge Pump for White LED Applications |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3132 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1.5X Fractional Charge Pump for White LED Applications |
| AAT3132A | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1.5X Fractional Charge Pump for White LED Applications |
| AAT3132AITP-1-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1.5X Fractional Charge Pump for White LED Applications |
| AAT3132ITP-1-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1.5X Fractional Charge Pump for White LED Applications |
| AAT3132ITP-T1 | 制造商:Skyworks Solutions Inc 功能描述:LED Lighting Drivers High Efficiency 1.5x Fractional Chrg Pump |
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