Datasheet > LTC1695

LTC1695

更新时间： 2024-11-06 22:39:51

品牌	Logo	应用领域
凌特 - Linear		风扇
页数	文件大小	规格书
20页	230K
描述
SMBus/I2C Fan Speed Controller in SOT-23

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中文翻译

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数据手册

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LTC1695 数据手册

LTC1695

SMBus/I C Fan Speed

Controller in SOT-23

FEATURES

DESCRIPTIO

Complete SMBus/I²C^TMBrushless DC Fan Speed

The LTC^®1695 fan speed controller provides all the func-

tionsnecessaryforapowermanagementmicroprocessor

to regulate the speed of a 5V brushless DC fan via a 2-wire

SMBus/I²C interface. Fan speed is controlled according to

the system’s required temperature profile and permits

lowerfanpowerconsumption, longerbatteryruntimeand

lower acoustical generated noise versus systems that

only provide simple on-off control for the fan.

■

Control System in a 5-Pin SOT-23 package

■

0.75Ω PMOS Linear Regulator with 180mA

Output Current Rating

■

0V to 4.922V Output Voltage Range Controlled by a

6-Bit DAC

Simple 2-Wire SMBus/I²C Interface

■

250ms Internal Timer Ensures Fan Start-Up

Current Limit and Thermal Shutdown

Fault Status Indication via SMBus Host Readback

■

The LTC1695 incorporates a 180mA low dropout linear

regulator, a 2-wire SMBus/I²C interface and a 6-bit DAC.

Fan speed is controlled by varying the fan’s terminal

voltagethroughtheoutputvoltageoftheLTC1695’slinear

regulator. The LTC1695’s output voltage is programmed

by sending a 6-bit digital code to the LTC1695 DAC via the

SMBus. To eliminate fan start-up problems at lower fan

voltages, users can enable the LTC1695’s boost start

feature that provides the DAC’s full-scale output voltage

for 250ms before decreasing to the programmed output

voltage.

■

APPLICATIO S

■

Notebook Computers

■

Spot Cooling

■

Portable Instruments

■

Battery-Powered Systems

■

DC Motor Control

■

White LED Power Supplies

■

Programmable Low Dropout Regulator

The LTC1695 includes output current limiting and thermal

shutdown as well as status monitors that can be read back

by the microprocessor during fault conditions. The

LTC1695 is available in a 5-lead SOT-23 package.

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

I C is a trademark of Philips Electronics N.V.

TYPICAL APPLICATION

Fan Voltage and Current vs DAC Code

120

100

= 5V

= 25°C

OUT

LOAD

5V DC FAN

OUT

10µF

LTC1695

SUNON

4.7µF

KDE0502PFB2-8

0.6W, 1.7 CFM

(25 • 25 • 10)mm³

GND

SCL

SDA

SYSTEM

CONTROLLER

1695 • TA01

DAC CODE

1695 • TA02

12 3 4 5 6 7...20

中文翻译

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与LTC1695相关器件

型号	品牌	获取价格	描述	数据表
LTC1695CS5	Linear	获取价格	SMBus/I2C Fan Speed Controller in SOT-23
LTC1695CS5#PBF	Linear	获取价格	LTC1695 - SMBus/I2C Fan Speed Controller in SOT-23; Package: SOT; Pins: 5; Temperature Ran
LTC1695CS5#TR	Linear	获取价格	LTC1695 - SMBus/I2C Fan Speed Controller in SOT-23; Package: SOT; Pins: 5; Temperature Ran
LTC1695CS5#TRM	Linear	获取价格	LTC1695 - SMBus/I2C Fan Speed Controller in SOT-23; Package: SOT; Pins: 5; Temperature Ran
LTC1695CS5#TRMPBF	Linear	获取价格	LTC1695 - SMBus/I2C Fan Speed Controller in SOT-23; Package: SOT; Pins: 5; Temperature Ran
LTC1696	Linear	获取价格	Synchronous Dual Mode Phase Modulated Full Bridge Controllers
LTC1696	ADI	获取价格	过压保护控制器
LTC1696ES6	Linear	获取价格	Overvoltage Protection Controller
LTC1696ES6#TRM	Linear	获取价格	暂无描述
LTC1696ES6#TRMPBF	Linear	获取价格	LTC1696 - Overvoltage Protection Controller; Package: SOT; Pins: 6; Temperature Range: -40

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