Datasheet > LM3520_0509

LM3520_0509

更新时间： 2024-11-25 04:44:27

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器显示器
页数	文件大小	规格书
14页	961K
描述
Integrated White LED Driver with Organic LED Display Power Supply

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LM3520_0509 数据手册

September 2005

LM3520

Integrated White LED Driver with Organic LED Display

Power Supply

General Description

Features

n Integrated OLED and white-LED driver

n 80% efficiency

The LM3520 is a dual step-up DC/DC converter, designed to

drive up to 5 white LEDs with a constant current and to

power an organic LED display with a constant voltage.

n Drives up to 5 LEDs at 20mA/3.6V and 4 LEDs at

30mA/3.6V for main-display

A single external resistor is used to set the maximum LED

current. The LED current can be adjusted by applying a

PWM signal to the EN pin. For higher efficiency the LM3520

operates with pulse frequency modulation (PFM) control

scheme when the sub-display is enabled. When Main dis-

play is enabled, the device is operating in PWM mode.

n Up to 20V 50mA/3.6V for sub-display

n True shutdown isolation

n Small External Components

n 1 MHz Switching Frequency

n 23V OverVoltage Protection

n Wide Input Voltage Range: 2.7V to 5.5V

n Cycle-By-Cycle Current Limit

n PWM Dimming Control

Overvoltage protection circuitry and a 1MHz switching fre-

quency allow for the use of small, low cost external compo-

nents.

Additional features include a low-side NFET switch that can

turn off the LED string with no DC current path to ground.

n Low Profile 14-Pin LLP(3mm x 4mm x 0.8mm)

The LM3520 is available in a small 14-pin thermally-

enchanced LLP package.

Applications

n Flip-phones/Clam-shell Cellular Phones

n Handheld Devices

n High-fashion cellular phones

n White LED Backlighting

n Digital Cameras

Typical Applications

20128803

Main Display with OLED Sub Display

DS201288

www.national.com

12 3 4 5 6 7...14

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与LM3520_0509相关器件

型号	品牌	获取价格	描述	数据表
LM3520SD	NSC	获取价格	Integrated White LED Driver with Organic LED Display Power Supply
LM3520SD/NOPB	TI	获取价格	IC LED DISPLAY DRIVER, PDSO14, 3 X 4 MM, 0.8 MM HEIGHT, LLP-14, Display Driver
LM3520SDX	NSC	获取价格	Integrated White LED Driver with Organic LED Display Power Supply
LM3520SDX/NOPB	TI	获取价格	LED DISPLAY DRIVER, PDSO14, 3 X 4 MM, 0.8 MM HEIGHT, LLP-14
LM3522	ETC	获取价格	SIZE 1 ARINC 404 CONNECTOR FOR ECS CABLE 352001
LM3524	NSC	获取价格	Regulating Pulse Width Modulator
LM3524D	NSC	获取价格	Regulating Pulse Width Modulator
LM3524D	TI	获取价格	40V、0.2A 350KHz PWM 控制器
LM3524DM	NSC	获取价格	Regulating Pulse Width Modulator
LM3524DM/NOPB	TI	获取价格	40V、0.2A 350KHz PWM 控制器 \| D \| 16 \| 0 to 125