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參數(shù)資料
| 型號： | AAT3175 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | High Efficiency 1X/1.5X/2X Charge Pump For White LED Flash Applications |
| 中文描述： | 高效率1x/1.5x/2x電荷泵白光LED閃光燈應(yīng)用 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 255K |
| 代理商： | AAT3175 |
General Description
The AAT3175 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 flash applications. The AAT3175 is capable of
driving up to three flash LEDs at 300mA total cur-
rent from a 2.7V to 5.5V input. A low external parts
count (two 1μF flying capacitors and two small 1μF
capacitors at V
IN
and V
OUT
) make this part ideally
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 all LEDs with 16 level settings down
to 0.
The AAT3175 is equipped with built-in protection
for V
OUT
short-circuit condition and auto-disable for
load short-circuit condition on any one of the chan-
nels. Built-in soft-start circuitry prevents excessive
inrush current during start-up. A low-current shut-
down feature disconnects the load from V
IN
and
reduces quiescent current to less than 1μA.
The AAT3175 is available in a Pb-free, space-saving,
thermally-enhanced 12-pin 3x3mm TDFN package.
Features
V
IN
Range: 2.7V to 5.5V
Up to 300mA Total Flash Current
Fully Programmable Current with Single Wire
— 16 Logarithmic Current Levels
Tri-Mode 1X, 1.5X, and 2X Charge Pump for
Maximum Efficiency and V
F
Coverage
Drives 3-in-1 or 2-in-1 Flash LEDs
— 0.5% Current Matching
No Inductors, Low Noise Operation
1MHz Constant Switching Frequency
Small Application Circuit
Built-In Thermal Protection
Automatic Soft-Start
I
Q
<1μA in Shutdown
TDFN33-12 Package
Applications
Programmable Current Sinks
White LED Backlighting
White Photo Flash for Mobile Phones
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Flash Applications
Typical Application
C2+
C2-
VOUT
C1+
C1-
VIN
GND
EN/SET
EN/SET
2.7V to 5.5V
D1
D2
D3
AAT3175
D1
D2
D3
D4
C
IN
1
μ
F
C1
1
μ
F
C
OUT
1
μ
F
3175.2006.01.1.2
1
ChargePump
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3175IWP-T1 | 制造商:Skyworks Solutions Inc 功能描述:LED Lighting Drivers High Efficiency Charge Pump |
| AAT3176AIDH-T1 | 制造商:Skyworks Solutions Inc 功能描述:IC LED DRVR FLASH 10TDFN 制造商:Advanced Analogic Tech 功能描述:AAT3176 Series 500 mA 5.5 V 1.5 MHz LED Photo Flash LED Driver IC - TDFN-10 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
| AAT3176IDH-T1 | 制造商:SKYWORKS SOLUTIONS INC 功能描述:500MA FLASH DRIVER IC 10TDFN TR |
| AAT3177 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Current, High Efficiency Charge Pump with Auto-Timer |
| AAT3177IWP-T1 | 制造商:SKYWORKS SOLUTIONS INC 功能描述:800MA FLASH DRIVER CHPUMP,TDFN33 TR 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
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