音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

LM2791LDX-L Datasheet

  • LM2791LDX-L

  • Current Regulated Switched Capacitor LED Driver with Analog ...

  • 11頁

  • NSC

掃碼查看芯片數(shù)據(jù)手冊

上傳產(chǎn)品規(guī)格書

PDF預覽

LM2791 Current Regulated Switched Capacitor LED Driver with Analog Brightness Control
July 2002
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
鹵
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 1碌A(chǔ) (max.).
The LM2791 is available in a 10 pin leadless leadframe
(LLP) CSP package.
Features
n
n
n
n
n
n
n
n
n
n
n
n
n
Output matching of
鹵
0.3%
Drives up to two LED鈥檚
3V to 5.8V Input Voltage
Up to 36mA output current
Soft start limits inrush current
Analog brightness control
Separate shutdown input
Very small solution size - no inductor
0.7mA typical operating current
1碌A(chǔ) (max.) shutdown current
450kHz switching frequency (min.)
Linear regulation generates predictable noise spectrum
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
漏 2002 National Semiconductor Corporation
DS200183
www.national.com

LM2791LDX-L相關(guān)型號PDF文件下載

您可能感興趣的PDF文件資料

熱門IC型號推薦

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時間周一至周五
9:00-17:30

關(guān)注官方微信號，
第一時間獲取資訊。

建議反饋
返回頂部

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務(wù)的動力！意見一經(jīng)采納，將有感恩紅包奉上哦！