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MAX31760

更新时间： 2024-11-06 14:57:51
品牌 Logo 应用领域
亚德诺 - ADI 控制器风扇
页数 文件大小 规格书
37页 1398K
描述
高精度风扇速度控制器，带有非易失查找表

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MAX31760 数据手册

 浏览型号MAX31760的Datasheet PDF文件第2页浏览型号MAX31760的Datasheet PDF文件第3页浏览型号MAX31760的Datasheet PDF文件第4页浏览型号MAX31760的Datasheet PDF文件第5页浏览型号MAX31760的Datasheet PDF文件第6页浏览型号MAX31760的Datasheet PDF文件第7页 
Evaluation Kit  
Available  
Design  
Resources  
Tools  
and Models  
Support  
Click here to ask an associate for production status of specific part numbers.  
Precision Fan-Speed Controller  
with Nonvolatile Lookup Table  
MAX31760  
General Description  
Features  
The MAX31760 integrates temperature sensing along  
with precision PWM fan control. It accurately measures  
its local die temperature and the remote temperature of  
a discrete diode-connected transistor, such as a 2N3906,  
or a thermal diode commonly found on CPUs, graphics  
processor units (GPUs), and other ASICs. Multiple tem-  
perature thresholds, such as local high/overtemperature  
(OT) and remote high/overtemperature, can be set by an  
● Operating Settings Stored in Nonvolatile Memory for  
Automatic Operation at Power-On  
● 48-Step Nonvolatile LUT Maps Temperature to PWM  
Duty Cycle  
● Smooth PWM Duty-Cycle Transitions Minimize  
Audibility of Fan Noise  
● Two Tachometer Inputs for Measuring the RPM of  
Two Fans Independently  
2
I C-compatible interface.  
● FF/FS Pin Multiplexes Fan-Failure Output with Full-  
Fan speed is controlled based on the temperature reading  
as an index to a 48-byte lookup table (LUT) containing  
user-programmed PWM values. The flexible LUT-based  
architecture enables the user to program a smooth  
nonlinear fan speed vs. temperature transfer function to  
minimize acoustic fan noise. Two tachometer inputs allow  
measuring the speeds of two fans independently. The  
FF/FS pin multiplexes an open-drain fan-failure output  
with a full-speed fan-drive input. When the local or remote  
OT threshold is exceeded, the SHDN pin is asserted low  
and can be used to shut down the system. A dedicated  
ALERT pin reports that either a local or remote high-  
temperature threshold has been exceeded. ALERT can  
be programmed to work in either fault indicator mode or  
interrupt mode. These features make the device a com-  
pact and complete solution for a single-fan or two-fan  
cooling system.  
Speed Fan-Drive Input  
● Accurately Senses Remote and Local Temperature  
● Programmable Thermal Diode Ideality Factor  
Minimizes Ideality Factor Mismatch  
● Automatic Series Resistance Cancellation  
● Dedicated ALERT Pin for Temperature Faults  
● SHDN Pin Available for System Overtemperature  
Shutdown  
● 3.0V to 3.6V Operating Voltage Range  
● -40°C to +125°C Operating Temperature Range  
Applications  
● Servers  
● Networking Equipment  
● STB/DVR  
Ordering Information appears at end of data sheet.  
● NAS/DAS  
Typical Application Circuit  
+3.3V  
FAN VOLTAGE  
+5V OR +12V  
V
4-WIRE FAN #1  
CC  
V
DD  
ALERT  
FF/FS  
SHDN  
TACH1  
TACH2  
TACH  
PWM  
GND  
MAX31760  
SDA  
SCL  
PWM  
TO SYSTEM HOST  
FAN VOLTAGE  
+5V OR +12V  
DXP  
V
CC  
4-WIRE FAN #2  
2200pF  
TACH  
PWM  
DXN  
REMODE  
A0 A1 A2 GND  
DIODE CONNECTED  
TRANSISTOR  
GND  
(e.g., CPU, GPU, OR ASIC)  
19-7395; Rev 1; 12/19  
©
2019 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.  
One Analog Way, Wilmington, MA 01887 U.S.A. Tel: 781.329.4700 © 2019 Analog Devices, Inc. All rights reserved.  
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