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參數(shù)資料
| 型號： | AAT2801IXN-4.5-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | Multi-Mode Charge Pump for White LED Backlight and Flash Applications |
| 中文描述： | 多模電荷泵白光LED背光和閃光燈應用 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 764K |
| 代理商： | AAT2801IXN-4.5-T1 |
AAT2801
Multi-Mode Charge Pump for
White LED Backlight and Flash Applications
2801.2006.04.1.3
1
ChargePump
General Description
The AAT2801 is a member of AnalogicTech's Total
Power Management IC (TPMIC) product family.
It has a dual charge pump architecture designed to
support both the white LED backlight and flash appli-
cations for systems operating with Lithium-Ion bat-
teries. The backlight charge pump provides power
required to drive up to four LEDs. To maximize
power efficiency, it automatically selects 1X, 1.5X, or
2X mode. The device produces current levels up to
30mA on each of its four current source outputs.
AnalogicTech's Simple Serial Control (S
2
Cwire)
interface is used to enable, disable, and set the LED
drive current with a 32-level logarithmic scale LED
brightness control.
The flash charge pump is a charge pump doubler
with a regulated output voltage. It is designed to
deliver 120mA of continuous current and up to
250mA of pulsed current. It has an independent
enable pin for improved power savings.
The AAT2801 is equipped with AnalogicTech’s
AutoBias technology which allows individual LEDs
to be powered either by charge pump or battery
input, determined internally and automatically to
maximize the power efficiency even with a large dif-
ference in LED forward voltage.
The AAT2801 has thermal protection and built-in
soft-start circuitry. Ahigh charge pump switching fre-
quency enables the use of very small external capac-
itors. The AAT2801 is available in the 16-pin
TDFN44 package.
Features
V
IN
Range: 2.7V to 5.5V
Dual Charge Pump
— Flash: Charge Pump Doubler
— Backlight: Tri-Mode Charge Pump
Drives Low-V
F
and High-V
F
LEDs
Up to Four 30mA Outputs
32-Position Logarithmic Scale with Digital
Control
Low Noise Constant Frequency Operation
1MHz Switching Frequency
AutoBias Technology
Regulated 4.5/5.0 Volts V
OUT_FLASH
Up to 250mA of Current for Flash
Automatic Soft Start
No Inductors
I
Q
<1μA in Shutdown
Available in 16-pin TDFN44 Package
Applications
Display Modules
Mobile Phones
PDAs
Smart Phones
Typical Application
AAT2801
C
IN
1
μ
F
V
IN
C
CP
1
μ
F
EN/SET
C1
1
μ
F
D3
D2
D1
IN
CP
C1
+
C1
-
D2
D3
D4
GND
D4
Backlight
Flash LED
C2
1
μ
F
C3
1
μ
F
C2
+
C2
-
C3
+
C3
-
OUT_FLSH
C
F
1
μ
F
R
B
Flash Enable
EN/SET
EN_FLSH
D1
相關PDF資料 |
PDF描述 |
|---|---|
| AAT2801IXN-5.0-T1 | Multi-Mode Charge Pump for White LED Backlight and Flash Applications |
| AAT2803 | Six-Channel White LED Backlight Charge Pump with Flash |
| AAT2803ISK-4.5-T1 | Six-Channel White LED Backlight Charge Pump with Flash |
| AAT2805 | Dual High Efficiency Charge Pump for White LED and Flash Applications |
| AAT2805IXN-4.5-T1 | Dual High Efficiency Charge Pump for White LED and Flash Applications |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AAT2801IXN-5.0-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Multi-Mode Charge Pump for White LED Backlight and Flash Applications |
| AAT2803 | 制造商:AAT 制造商全稱:AAT 功能描述:Six-Channel White LED Backlight Charge Pump with Flash |
| AAT2803ISK-4.5-T1 | 制造商:Skyworks Solutions Inc 功能描述:LED Display Drivers 6-Ch White LED Back- light Charge Pump |
| AAT2805 | 制造商:AAT 制造商全稱:AAT 功能描述:Dual High Efficiency Charge Pump for White LED and Flash Applications |
| AAT2805IXN-4.5-T1 | 制造商:AAT 制造商全稱:AAT 功能描述:Dual High Efficiency Charge Pump for White LED and Flash Applications |
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