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參數(shù)資料
| 型號： | AAT3152IWP-T1 |
| 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)： | 1/10頁 |
| 文件大?。?/td> | 127K |
| 代理商： | AAT3152IWP-T1 |
AAT3152
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Applications
P
3152.2004.12.0.9
1
ChargePump
General Description
The AAT3152 is a low noise, constant frequency
charge pump DC/DC converter that uses a tri-mode
load switch (1X), fractional (1.5X), and doubling (2X)
conversion to maximize efficiency for white LED
applications. The AAT3152 is capable of driving
four-channel LEDs from a 2.7V to 5.5V input. The
current sinks may be operated individually or in par-
allel for driving higher-current LEDs. Low external
parts count (two 1μF flying capacitors and two small
1μF capacitors at V
IN
and V
OUT
) makes this part ide-
ally suited for small battery-powered applications.
AnalogicTech's S
2
Cwire (Simple Serial Control)
serial digital input is used to enable, disable, and
set current for each LED with eight settings (20mA
down to 50μA) including main/sub-display group
control. The AAT3152 consumes extremely low cur-
rent internally (80μA typical) at light load for opti-
mized efficiency.
Each output of the AAT3152 is equipped with built-
in protection for V
OUT
short circuit and auto-disable
for load short-circuit condition. Built-in soft-start cir-
cuitry 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 AAT3152 is available in a space-saving, ther-
mal-enhanced 12-pin 3x3mm DFN package.
Features
V
IN
Range: 2.7V to 5.5V
Fully Programmable Current with Single Wire
Eight-Step Current: 20mA to 50μA
Individual Main-Sub Group Control
Low I
Q
(80μA) at Light Load
Tri-Mode 1X, 1.5X, and 2X Charge Pump for
Maximum Efficiency and V
F
Coverage
Drives 1-4 Channels of LEDs
No Inductors, Low Noise Operation
1MHz Constant Switching Frequency
Small Application Circuit
Built-In Thermal Protection
Built-In Auto-Disable for Short-Circuit
Automatic Soft-Start
I
Q
<1μA in Shutdown
Thermal-Enhanced 3x3mm12-Pin DFN
Package
Applications
Color (RGB) Lighting
Programmable Current Sinks
White LED Backlighting
White Photo Flash for DSCs
Typical Application
C1
1
μ
F
C2
1
μ
F
D1
D2
D3
D4
C
OUT
1
μ
F
C
IN
1
μ
F
2.7V to 5.5V
EN/SET
V
IN
EN/SET
C1+
C1-
C2+
C2-
V
OUT
D1
D2
D3
D4
GND
AAT3152
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3153 | 制造商:AAT 制造商全稱:AAT 功能描述:High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
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| AAT3155 | 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 |
| AAT3155ITP-T1 | 制造商:Skyworks Solutions Inc 功能描述:1X,1.5X,2X WLED CHPMP 12TSOPJW TR 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
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