- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375166 > AAT3151BIWP-T1 (Advanced Analogic Technologies, Inc.) High Efficiency 1X/1.5X Charge Pump For White LED Applications PDF資料下載
參數(shù)資料
| 型號： | AAT3151BIWP-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | High Efficiency 1X/1.5X Charge Pump For White LED Applications |
| 中文描述： | 高效1x/1.5x電荷泵為白光LED應(yīng)用 |
| 文件頁數(shù)： | 1/15頁 |
| 文件大?。?/td> | 274K |
| 代理商： | AAT3151BIWP-T1 |
AAT3151B
High Efficiency 1X/1.5X Charge Pump
For White LED Applications
3151B.2007.09.1.0
1
ChargePump
General Description
The AAT3151B is a low noise, constant frequency
charge pump DC/DC converter that uses a dual
mode load switch (1X) and fractional (1.5X) charge
pump conversion to maximize efficiency for white
LED applications. The AAT3151B is capable of
driving four white LEDs at a total of 120mA from a
2.7V to 5.5V input. The current sinks may be oper-
ated individually or in parallel for driving higher-cur-
rent LEDs. A low external parts count (two 1μF fly-
ing capacitors and two small 1μF capacitors at V
IN
and V
OUT
) makes the AAT3151B ideally suited for
small battery-powered applications.
AnalogicTech's AS
2
Cwire (Advanced Simple
Serial Control) serial digital input is used to
enable, disable, and set current for each LED with
a 16-level logarithmic scale plus four low-current
settings down to 50μA for optimized efficiency, with
a low housekeeping current of only 50μA.
The charge pump output of the AAT3151B is
equipped with built-in protection for V
OUT
. Each
current sink input has short-circuit and auto-disable
to guard against LED failure conditions. Built-in
soft-start circuitry prevents excessive inrush cur-
rent during start-up. A low-current shutdown fea-
ture disconnects the load from V
IN
and reduces
quiescent current to less than 1μA.
The AAT3151B is available in a Pb-free, space-
saving, thermally-enhanced, 12-pin 3x3mm TDFN
package.
Features
V
IN
Range: 2.7V to 5.5V
Fully Programmable Current with Single Wire
— 16-Step Logarithmic Scale
— 15/20/30mA Max Current
— Four Low-Current Settings Down to 50μA
— Low I
Q
(50μA) for Low-Current Mode
Dual Mode 1X and 1.5X Charge Pump for
Maximum Efficiency and V
F
Coverage
Drives Four 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
TDFN33-12 Package
Applications
Color (RGB) Lighting
Programmable Current Sinks
White LED Backlighting
White Photo Flash for Digital Still Cameras
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
VIN
EN/SET
C1+
C1-
C2+
C2-
VOUT
D1
D2
D3
D4
GND
AAT3151B
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT3151 | High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
| AAT3151IWP-T1 | High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
| AAT3152 | High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
| AAT3152IWP-T1 | High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
| AAT3155 | High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3151IFP-T1 | 制造商:Skyworks Solutions Inc 功能描述:LED Lighting Drivers High Eff 1x/1.5x/2x Mode w/ PWM Control |
| AAT3151IWP-T1 | 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
| AAT3152 | 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 |
| AAT3152_05 | 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 |
| AAT3152IWP-T1 | 制造商:SKYWORKS SOLUTIONS INC 功能描述:1X,1.5X,2X WLED CHPMP 12TDFN TR 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。