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參數(shù)資料
| 型號(hào)： | AAT3114 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | High Efficiency 1.5X Fractional Charge Pumps For White LED Applications |
| 中文描述： | 高效率1.5倍分?jǐn)?shù)電荷泵為白光LED應(yīng)用 |
| 文件頁(yè)數(shù)： | 1/15頁(yè) |
| 文件大?。?/td> | 331K |
| 代理商： | AAT3114 |
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AAT3113, AAT3114/14A
High Efficiency 1.5X Fractional Charge
Pumps For White LED Applications
Typical Application
C
IN
1
μ
F
V
BATTERY
C
OUT
1
μ
F
EN/SET
C1
1
μ
F
C2
1
μ
F
D4
D3
D2
D1
VIN
OUT
C1+
C1-
C2+
C2-
D1
D2
D3
D4
D5
D6
EN/SET
GND
AAT3114/14A
D5
D6
3113.2006.07.1.9
1
ChargePump
General Description
The AAT3113 and AAT3114/14A are low noise, con-
stant frequency charge pump DC/DC converters
that use fractional (1.5X) conversion to increase effi-
ciency in white LED applications. The devices can
be used to produce current levels up to 20mA for
each output from a 2.7V to 5.5V input. A low exter-
nal parts count (two 1μF flying capacitors and two
small bypass capacitors at V
IN
and OUT) makes
these devices ideally suited for small, battery-pow-
ered applications.
AnalogicTech’s Simple Serial Control (S
2
Cwire)
interface is used to enable, disable, and set the
LED drive current for 32-level logarithmic scale LED
brightness control. AAT3113 and AAT3114/14A
devices have a thermal management system for
protection in the event of a short-circuit condition on
any of the output pins. Built-in soft-start circuitry
prevents excessive inrush current during start-up.
Ahigh switching frequency enables the use of small
external capacitors. A low-current shutdown feature
disconnects the load from V
IN
and reduces quies-
cent current to less than 1μA. The AAT3113 pro-
vides four LED current source outputs, and the
AAT3114/14A provides six. The AAT3113 is avail-
able in a Pb-free 12-pin TSOPJW package, and the
AAT3114/14A is available in a Pb-free 16-pin QFN
package.
Features
AAT3113: Four Outputs
AAT3114/14A: Six Outputs
20mA Full-Scale Current
Simple Serial Control (S
2
Cwire) Interface
— 32-Position Logarithmic Scale with Digital
Control
Low Noise Constant Frequency Operation
33% Less Input Current Than Doubler
Charge Pump
High Accuracy Brightness Matching
Small Application Circuit
Regulated Output Current
Automatic Soft Start
V
IN
Range: 2.7V to 5.5V
No Inductors
600kHz Switching Frequency
I
Q
<1μA in Shutdown
Temperature Range: -40°C to 85°C
12-Pin TSOPJW Package (AAT3113)
16-Pin QFN Package (AAT3114/14A)
Applications
Programmable Current Source
White LED Backlighting
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT3114A | High Efficiency 1.5X Fractional Charge Pumps For White LED Applications |
| AAT3114AISN-20-T1 | High Efficiency 1.5X Fractional Charge Pumps For White LED Applications |
| AAT3119 | High Efficiency 2X Charge Pump |
| AAT3119IJS-4.5-T1 | High Efficiency 2X Charge Pump |
| AAT3119IJS-5.0-T1 | High Efficiency 2X Charge Pump |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3114A | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1.5X Fractional Charge Pumps For White LED Applications |
| AAT3114AISN | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1.5X Fractional Charge Pumps For White LED Applications |
| AAT3114AISN-20-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1.5X Fractional Charge Pumps For White LED Applications |
| AAT3114ISN | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1.5X Fractional Charge Pumps For White LED Applications |
| AAT3114ISN-20-T1 | 制造商:Skyworks Solutions Inc 功能描述:FRACT CHPMP FOR WHT LED, QFN44-1 TR 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
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