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參數(shù)資料
| 型號(hào)： | AAT3142 |
| 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(yè)數(shù)： | 1/16頁(yè) |
| 文件大?。?/td> | 425K |
| 代理商： | AAT3142 |
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AAT3142
High Efficiency 1X/1.5X/2X Charge Pump
for White LED Applications
3142.2005.12.1.1
1
ChargePump
General Description
The AAT3142 is a low noise, constant frequency
charge pump DC/DC converter that uses a tri-
mode load switch (1X), fractional (1.5X), and dou-
bling (2X) conversion to maximize efficiency for
white LED applications. The device produces cur-
rent levels up to 30mA on each of its three current
source outputs to drive various arrangements of
LEDs from a 2.7V to 5.5V input. Outputs may be
operated individually or in parallel for driving high-
er-current LEDs. A low external parts count (two
1μF flying capacitors and two small 1μF capacitors
at V
IN
and CP) make the AAT3142 ideally suited for
small battery-powered applications.
AnalogicTech's Simple Serial Control (S
2
Cwire)
digital input is used to enable, disable, and set the
LED drive current with a 32-level logarithmic scale
LED brightness control. The AAT3142 has a thermal
management system to protect the device in the
event of a short-circuit condition at an output pin.
Built-in soft-start circuitry prevents excessive inrush
current during start-up. A high charge pump switch-
ing frequency enables the use of very small external
capacitors. In shutdown mode, the device discon-
nects the load from V
IN
and reduces quiescent cur-
rent to less than 1μA. The AAT3142 is available in
the very small, Pb-free 12-pin TSOPJW package.
Features
V
IN
Range: 2.7V to 5.5V
Tri-Mode 1X, 1.5X, and 2X Charge Pump for
Maximum Efficiency and V
F
Coverage
Drives Low-V
F
and High-V
F
Type LEDs
Up to Three 30mA Outputs
32-Position Logarithmic Scale with Digital
Control
Low Noise Constant Frequency Operation
1MHz Switching Frequency
Small Application Circuit
Regulated Output Current
Automatic Soft Start
No Inductors
I
Q
< 1μA in Shutdown
12-Pin TSOPJW Package
Applications
Color (RGB) Lighting
Programmable Current Sources
White LED Backlighting
White Photo Flash for Digital Still Cameras
Typical Application
C
IN
1
μ
F
V
BATTERY
C
CP
1
μ
F
EN/SET
C1
1
μ
F
C2
1
μ
F
D3
D2
D1
VIN
CP
C1+
C1-
C2+
C2-
D1
D2
D3
EN/SET
GND
AAT3142
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT3142ITP-T1 | High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications |
| AAT3151B | High Efficiency 1X/1.5X Charge Pump For White LED Applications |
| AAT3151BIWP-T1 | High Efficiency 1X/1.5X Charge Pump For White LED Applications |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3142_07 | 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 |
| AAT3142ITP-T1 | 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
| AAT3143 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1X/1.5X/2X Charge Pump with PWM Control for White LED Applications |
| AAT3143ITP-T1 | 制造商:Skyworks Solutions Inc 功能描述:2X,1.5X,1X WLED CHPMP, TSOPJW-12 TR |
| AAT3150AIWP-T1 | 制造商:SKYWORKS SOLUTIONS INC 功能描述:1X/1.5X/2X CHPUMP FOR WHITE LED TR |
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