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LTC1695CS5 PDF预览

LTC1695CS5

更新时间: 2024-09-23 22:39:51
品牌 Logo 应用领域
凌特 - Linear 运动控制电子器件风扇信号电路光电二极管电动机控制
页数 文件大小 规格书
20页 230K
描述
SMBus/I2C Fan Speed Controller in SOT-23

LTC1695CS5 技术参数

是否Rohs认证: 不符合生命周期:Transferred
零件包装代码:SOT包装说明:LSSOP,
针数:5Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.05模拟集成电路 - 其他类型:BRUSHLESS DC MOTOR CONTROLLER
JESD-30 代码:R-PDSO-G5JESD-609代码:e0
长度:2.9 mm湿度敏感等级:1
功能数量:1端子数量:5
最高工作温度:70 °C最低工作温度:
封装主体材料:PLASTIC/EPOXY封装代码:LSSOP
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
峰值回流温度(摄氏度):235认证状态:Not Qualified
座面最大高度:1.45 mm最大供电电压 (Vsup):5.5 V
最小供电电压 (Vsup):4.5 V标称供电电压 (Vsup):5 V
表面贴装:YES技术:CMOS
温度等级:COMMERCIAL端子面层:Tin/Lead (Sn/Pb)
端子形式:GULL WING端子节距:0.95 mm
端子位置:DUAL处于峰值回流温度下的最长时间:20
宽度:1.625 mmBase Number Matches:1

LTC1695CS5 数据手册

 浏览型号LTC1695CS5的Datasheet PDF文件第2页浏览型号LTC1695CS5的Datasheet PDF文件第3页浏览型号LTC1695CS5的Datasheet PDF文件第4页浏览型号LTC1695CS5的Datasheet PDF文件第5页浏览型号LTC1695CS5的Datasheet PDF文件第6页浏览型号LTC1695CS5的Datasheet PDF文件第7页 
LTC1695  
2
SMBus/I C Fan Speed  
Controller in SOT-23  
U
FEATURES  
DESCRIPTIO  
Complete SMBus/I2CTM Brushless 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  
0.75PMOS 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.  
U
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.  
2
U
TYPICAL APPLICATION  
Fan Voltage and Current vs DAC Code  
120  
100  
80  
60  
40  
20  
0
6
5
4
3
2
1
0
V
A
= 5V  
CC  
T
= 25°C  
5V  
1
5
4
V
V
OUT  
CC  
+
I
LOAD  
5V DC FAN  
V
OUT  
10µF  
LTC1695  
+
SUNON  
2
3
4.7µF  
KDE0502PFB2-8  
0.6W, 1.7 CFM  
(25 • 25 • 10)mm3  
GND  
SCL  
SDA  
SYSTEM  
CONTROLLER  
1695 • TA01  
40  
30  
DAC CODE  
60  
70  
0
10  
20  
50  
1695 • TA02  
1

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