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參數(shù)資料
| 型號： | LM2791LD-H |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動器 |
| 英文描述： | Current Regulated Switched Capacitor LED Driver with Analog Brightness Control |
| 中文描述： | LED DISPLAY DRIVER, DSO10 |
| 封裝： | 3 X 3 MM, 0.80 MM HEIGHT, LLP-10 |
| 文件頁數(shù)： | 1/11頁 |
| 文件大小： | 226K |
| 代理商： | LM2791LD-H |
LM2791
Current Regulated Switched Capacitor LED Driver with
Analog Brightness Control
General Description
The LM2791 is a CMOS charge-pump voltage doubler and
regulator that provides two regulated current sources. The
LM2791 is designed to drive two white (or blue) LEDs with
matched currents (within
±
0.3%) to produce balanced light
sources for display backlights. They accept an input voltage
range from 3V to 5.8V and maintain a constant current
determined by an external set resistor.
The LM2791 delivers up to 36mA of load current to accom-
modate two high forward voltage (typically white) LEDs. The
switching frequency is 450kHz (min.) to keep the conducted
noise spectrum away from sensitive frequencies within por-
table RF devices.
In the LM2791, brightness is controlled by applying a voltage
between GND and 3.0V to the BRGT pin. The LM2791 is
available in active high or low shutdown versions. The shut-
down pin reduces the operating current to 1μA (max.).
The LM2791 is available in a 10 pin leadless leadframe
(LLP) CSP package.
Features
n
Output matching of
±
0.3%
n
Drives up to two LED’s
n
3V to 5.8V Input Voltage
n
Up to 36mA output current
n
Soft start limits inrush current
n
Analog brightness control
n
Separate shutdown input
n
Very small solution size - no inductor
n
0.7mA typical operating current
n
1μA (max.) shutdown current
n
450kHz switching frequency (min.)
n
Linear regulation generates predictable noise spectrum
n
LLP-10 package: 3mm X 3mm X 0.8mm
Applications
n
White LED Display Backlights
n
White LED Keypad Backlights
n
1-Cell Li-Ion battery-operated equipment including
PDAs, hand-held PCs, cellular phones
n
Flat Panel Dispalys
Basic Application Circuit
20018301
July 2002
L
2002 National Semiconductor Corporation
DS200183
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM2791 | Current Regulated Switched Capacitor LED Driver with Analog Brightness Control |
| LM2791LD-L | Current Regulated Switched Capacitor LED Driver with Analog Brightness Control |
| LM2791LDX-H | Current Regulated Switched Capacitor LED Driver with Analog Brightness Control |
| LM2791LDX-L | Current Regulated Switched Capacitor LED Driver with Analog Brightness Control |
| LM2792LD-H | Current Regulated Switched Capacitor LED Driver with Analog Brightness Control |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2791LD-H/NOPB | 功能描述:IC LED DRIVR WHITE BCKLGT 10-LLP 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 |
| LM2791LD-L | 功能描述:LED照明驅(qū)動器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| LM2791LD-L/NOPB | 功能描述:LED照明驅(qū)動器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| LM2791LDX-H | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Current Regulated Switched Capacitor LED Driver with Analog Brightness Control |
| LM2791LDX-L | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Current Regulated Switched Capacitor LED Driver with Analog Brightness Control |
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