Datasheet > LTC3205EUF

LTC3205EUF

更新时间： 2024-09-24 11:41:51

品牌	Logo	应用领域
凌特 - Linear		显示器控制器
页数	文件大小	规格书
16页	248K
描述
Multidisplay LED Controller

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中文翻译

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数据手册

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LTC3205EUF 数据手册

LTC3205

Multidisplay

LED Controller

FEATURES

DESCRIPTIO

TheLTC^®3205isahighlyintegratedmultidisplayLEDcon-

troller. The part contains a high efficiency, low noise frac-

tional step-up/step-down charge pump to provide power

for both main and sub white LED displays plus an RGB

color LED display. The LTC3205 requires only four small

ceramic capacitors plus two resistors to form a complete

3-display LED power supply and current controller.

■

Step-Up/Step-Down Fractional Charge Pump for Up

to 92% Efficiency

■

Independent Current and Dimming Control for

1-4 LED Main, 1-2 LED Sub and RGB LED Displays

■

LED Currents Programmable Using 3-Wire Serial

Interface

■

Up to 250mA of Continuous LED Current

■

0.7% LED Current Matching

Maximum currents for the main/sub and RGB displays are

set independently with a single resistor. Current for each

LED is controlled with an internal current source. Dim-

ming and ON/OFF control for all displays are achieved via

a 3-wire serial interface. Four dimming states exist for the

mainandsubdisplaysand16dimmingstatesareavailable

via internal PWM for the red, green and blue LEDs result-

ing in up to 4096 color combinations.

■

Low Noise Constant Frequency Operation*

■

Minimal Component Count

■

Automatic Soft-Start Limits Inrush Current

■

Four Programmable Dimming States for Main and

Sub Displays

■

Up to 4096 Color Combinations for RGB Display

■

Low Shutdown Current: I_CC< 1µA

Tiny 24-Lead (4mm × 4mm) QFN Package

■

The LTC3205 charge pump optimizes efficiency based on

V_INand LED forward voltage conditions. The part powers

upinstep-downmodeandautomaticallyswitchestostep-

up mode once any enabled LED current source begins to

enterdropout.Internalcircuitrypreventsinrushcurrentand

excess input noise during start-up and mode switching.

APPLICATIO S

■

Cellular Phones

Wireless PDAs

■

Multidisplay Handheld Devices

, LTC and LT are registered trademarks of Linear Technology Corporation.

* U.S. Patent 6,411,531

The LTC3205 is available in a low profile 24-lead

(4mm × 4mm × 0.8mm) QFN package.

TYPICAL APPLICATIO

4-LED Main Panel Efficiency

vs Input Voltage

1µF

100

MAIN DISPLAY

SUB DISPLAY

RGB ILLUMINATOR

2.8V TO

4.5V

CPO

1µF

LTC3205

RED

GREEN BLUE

MAIN1-4

SUB1-2

RGB

SERIAL

INTERFACE

3205 TA01a

SERIAL PORT

FOUR LEDs AT 15mA/LED

(TYP V AT 15mA = 3.2V)

RGB

= 25°C

3.0

3.3

3.6

3.9

4.2

INPUT VOLTAGE (V)

3205 TA01b

3205f

12 3 4 5 6 7...16

中文翻译

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与LTC3205EUF相关器件

型号	品牌	获取价格	描述	数据表
LTC3206	Linear	获取价格	I2C Multidisplay LED Controller
LTC3206	ADI	获取价格	I2C 多显示屏 LED 控制器
LTC3206EUF	Linear	获取价格	I2C Multidisplay LED Controller
LTC3206EUF#PBF	Linear	获取价格	暂无描述
LTC3206EUF#TR	Linear	获取价格	LTC3206 - I<sup>2</sup>C Multidisplay LED Controller; Package: QFN; Pins: 24;
LTC3206EUF#TRPBF	Linear	获取价格	LTC3206 - I<sup>2</sup>C Multidisplay LED Controller; Package: QFN; Pins: 24;
LTC3207	Linear	获取价格	600mA Universal Multi-Output LED/CAM Driver
LTC3207	ADI	获取价格	600mA 通用型多输出 LED/CAM 驱动器
LTC3207_15	Linear	获取价格	600mA Universal Multi-Output LED/CAM Driver
LTC3207-1	Linear	获取价格	600mA Universal Multi-Output LED/CAM Driver

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