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參數(shù)資料
| 型號： | A8430EEK |
| 廠商： | Allegro MicroSystems, Inc. |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | White LED Driver Constant Current Step-up Converter |
| 中文描述： | 白光LED驅(qū)動恒流升壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 329K |
| 代理商： | A8430EEK |
D
2
A8430
White LED Driver Constant Current Step-up Converter
Use the following complete part number when ordering:
AB SO LUTE MAX MUM RAT NGS
SW Pin................................................
–0.3 V to 36 V
Remaining Pins..................................
–0.3 V to 10 V
Ambient Operating Temperature, T
A
.......
–40°C to 85°C
Junction Temperature, T
J(max)
...............................
150°C
Storage Temperature, T
S
....................
–55°C to 150°C
A8430 MLPD
Output voltage up to 36 V
2.5 V to 10 V input
Drives up to 4 LEDs at 20 mA from a 2.5 V supply
Drives up to 5 LEDs at 20 mA from a 3 V supply
1.2 MHz switching frequency
300 mA switch current limit
1 μA shutdown current
FEATURES
LED backlights
Portable battery-powered equipment
Cellular phones
PDAs (Personal Digital Assistant)
Camcorders, personal stereos, MP3 players, cameras
Mobile GPS systems
APPLICATIONS
The A8430 is a noninverting boost converter that steps-up the input
voltage, to provide a programmable constant current output at up to
36 V for driving white LEDs in series. Driving LEDs in series ensures
identical currents and uniform brightness. Up to four white LEDs can
be driven at 20 mA from a single cell Li-ion or a multicell NiMH power
source. Up to seven white LEDs can be driven by increasing the supply
voltage up to 10 V.
The A8430 incorporates a power switch and feedback sense amplifier
to provide a solution with minimum external components. The output
current can be set by adjusting a single external sense resistor and can
be varied with a voltage or filtered PWM signal when dimming control
is required. The high switching frequency of 1.2 MHz allows the use of
small inductor and capacitor values.
The A8430 is provided in a 5-pin 3 mm x 3 mm MLP package (part
number suffix
EK
), that has a nominal height of only 0.75 mm. The
lead-free version (part number suffix
EK-T
) has 100% lead-free matte
tin leadframe plating.
5
1
2
3
4
SW
GND
FB
VIN
EN
Part Number
A8430EEK
A8430EEK-T
Package
5-pin, MLPD
5-pin, MLPD
Description
Surface Mount
Lead-Free, Surface Mount
R
θ
JA
= 50 °C/W, see note 1, page 2
Approximate actual size
Same pad footprint as SOT-23-5
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| A8430EEK-T | White LED Driver Constant Current Step-up Converter |
| A8431 | White LED Driver Constant Current Step-up Converter |
| A8431EEH-T | White LED Driver Constant Current Step-up Converter |
| A8436 | Photoflash Capacitor Charger with IGBT Driver |
| A8436EEJTR-T | Photoflash Capacitor Charger with IGBT Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| A8430EEK-T | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:White LED Driver Constant Current Step-up Converter |
| A8430EEKTR-T | 功能描述:IC LED DRVR WHITE BCKLGHT 5-MLPD RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動器 系列:- 標準包裝:1 系列:- 恒定電流:- 恒定電壓:- 拓撲:PWM，切換式電容器（充電泵） 輸出數(shù):1 內(nèi)部驅(qū)動器:是 類型 - 主要:背光 類型 - 次要:白色 LED 頻率:642kHz 電源電壓:2.7 V ~ 5.5 V 輸出電壓:5V 安裝類型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤 供應商設(shè)備封裝:10-VSON 包裝:剪切帶 (CT) 工作溫度:-30°C ~ 85°C 產(chǎn)品目錄頁面:1371 (CN2011-ZH PDF) 其它名稱:BD1603NUV-E2CT |
| A8430EEKTR-T | 制造商:Allegro MicroSystems 功能描述:DC-DC Converter IC |
| A8431 | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:White LED Driver Constant Current Step-up Converter |
| A8431EEH-T | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:White LED Driver Constant Current Step-up Converter |
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