Datasheet > LM2792

LM2792

更新时间： 2024-11-12 22:51:43

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器开关
页数	文件大小	规格书
10页	203K
描述
Current Regulated Switched Capacitor LED Driver with Analog Brightness Control

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LM2792 数据手册

July 2002

LM2792

Current Regulated Switched Capacitor LED Driver with

Analog Brightness Control

General Description

Features

n Output matching of 0.3% (typ.)

n Drives up to two LED’s

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.

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

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.).

Applications

n White LED Display Backlights

The LM2792 is available in a 10 pin leadless leadframe

(LLP) CSP package.

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

DS200242

www.national.com

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与LM2792相关器件

型号	品牌	获取价格	描述	数据表
LM2792LD-H	NSC	获取价格	Current Regulated Switched Capacitor LED Driver with Analog Brightness Control
LM2792LD-H/NOPB	TI	获取价格	IC LED DISPLAY DRIVER, DSO10, 3 X 3 MM, 0.80 MM HEIGHT, LLP-10, Display Driver
LM2792LD-L	NSC	获取价格	Current Regulated Switched Capacitor LED Driver with Analog Brightness Control
LM2792LD-L	ROCHESTER	获取价格	LED DISPLAY DRIVER, DSO10, 3 X 3 MM, 0.80 MM HEIGHT, LLP-10
LM2792LD-L/NOPB	TI	获取价格	IC LED DISPLAY DRIVER, DSO10, 3 X 3 MM, 0.80 MM HEIGHT, LLP-10, Display Driver
LM2792LD-L/NOPB	ROCHESTER	获取价格	LED DISPLAY DRIVER, DSO10, 3 X 3 MM, 0.80 MM HEIGHT, LLP-10
LM2792LDX-H	NSC	获取价格	Current Regulated Switched Capacitor LED Driver with Analog Brightness Control
LM2792LDX-H/NOPB	TI	获取价格	LED DISPLAY DRIVER, DSO10, 3 X 3 MM, 0.80 MM HEIGHT, LLP-10
LM2792LDX-L	NSC	获取价格	Current Regulated Switched Capacitor LED Driver with Analog Brightness Control
LM2792LDX-L/NOPB	TI	获取价格	LED DISPLAY DRIVER, DSO10, 3 X 3 MM, 0.80 MM HEIGHT, LLP-10