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參數(shù)資料
| 型號(hào)： | AAT3122 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | RAC30-SA(-E)(-ST) Series - Powerline Regulated AC-DC Converters; Output Voltage (Vdc): 12V; Features: AC-DC Power Supply; 30 Watt PCB Mount Package; Universal Input Voltage Range; 3000VAC Isolation; Low Output Ripple and Noise; Short Circuit Protected; UL Certified |
| 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(yè)數(shù)： | 1/12頁(yè) |
| 文件大?。?/td> | 319K |
| 代理商： | AAT3122 |
AAT3122
High Efficiency 1X/1.5X Fractional Charge
Pump for White LED Applications
3122.2004.08.1.2
1
ChargePump
General Description
The AAT3122 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 increase efficiency in White LED appli-
cations. With input voltages ranging from 2.7-5.5
Volts, the device can produce an output current of
up to 120mA. A low external parts count (two 1μF
flying capacitors and two small bypass capacitors
at V
IN
and OUT) makes the AAT3122 ideally suited
for small battery-powered applications.
AnalogicTech's
(S
2
Cwire) interface is used to enable, disable
and set the LED drive current with a 32 level loga-
rithmic scale LED brightness control. The AAT3122
has a thermal management system to protect the
device 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.
High switching frequency enables the use of small
external capacitors. Alow shutdown current feature
disconnects the load from V
IN
and reduces quies-
cent current to less than 1μA. The AAT3122 pro-
vides a single current source output that can be
used to drive up to 6 LEDs at 20mA each. The
AAT3122 is available in a TSOPJW-12 package.
Simple
Serial
Control
Features
V
IN
Range: 2.7V to 5.5V
<1μA of Shutdown Current
1 MHz Switching Frequency
Dual Mode 1x and 1.5x Charge Pump for
Maximum Efficiency
Only 4 External components
Simple Serial Control (S
2
Cwire) Interface
Low Noise Constant Frequency Operation
33% Less Input Current Than Doubler Charge
Pumps
Small Application Circuit
Regulated Output Current
Automatic Soft-Start
No Inductors
TSOPJW-12 Package
-40 to +85C° Temperature Range
Applications
White LED Backlighting
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
D1
V
IN
V
OUT
C1+
C1-
C2+
C2-
D
EN/SET
GND
AAT3122
D2
D3
D4
D5
D6
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PDF描述 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3122_05 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications |
| AAT3122ITP-T1 | 制造商:Skyworks Solutions Inc 功能描述:1.5X, 1X WH LED CHPMP, TSOPJW-12 TR |
| AAT3123 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications |
| AAT3123_08 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications |
| AAT3123A | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications |
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