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參數資料
| 型號： | LM2792 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | LED驅動器 |
| 英文描述： | Current Regulated Switched Capacitor LED Driver with Analog Brightness Control |
| 中文描述： | 電流調節開關電容LED與模擬亮度控制驅動器 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 204K |
| 代理商： | LM2792 |
LM2792
Current Regulated Switched Capacitor LED Driver with
Analog Brightness Control
General Description
The LM2792 is a CMOS charge-pump voltage doubler and
regulator that provides two regulated current sources. They
are designed to drive two white (or blue) LEDs with matched
currents (within
±
0.3%) to produce balanced light sources
for display backlights. The LM2792 accepts an input voltage
range from 3.0V to 5.8V and maintain a constant current
determined by an external set resistor.
The LM2792 delivers up to 34mA of load current to accom-
modate two high forward voltage (typically white) LEDs. The
switching frequency is 900kHz (min.) to keep the conducted
noise spectrum away from sensitive frequencies within por-
table RF devices.
The LM2792 offers full off to maximum current control
through the BRGT pin. The output current linearly tracks the
BRGT pin voltage. The LM2792 is available in active high or
low shutdown versions. The shutdown pin reduces the op-
erating current to 1μA (max.).
The LM2792 is available in a 10 pin leadless leadframe
(LLP) CSP package.
Features
n
Output matching of
±
0.3% (typ.)
n
Drives up to two LED’s
n
3.0V to 5.8V Input Voltage
n
Up to 34mA output current
n
Soft start limits inrush current
n
Analog brightness control
n
Separate shutdown input
n
Very small solution size and no inductor
n
1.4mA typical operating current
n
1μA (max.) shutdown current
n
900kHz 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
20024201
July 2002
L
2002 National Semiconductor Corporation
DS200242
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM2792B-H WAF | 制造商:Texas Instruments 功能描述: |
| LM2792B-L WAF | 制造商:Texas Instruments 功能描述: |
| LM2792LD-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 |
| LM2792LD-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:1 內部驅動器: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 產品目錄頁面:1371 (CN2011-ZH PDF) 其它名稱:BD1603NUV-E2CT |
| LM2792LD-L | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
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