Two Remote and One Local Temperature Sensors and 3/4 Fan Controllers with SMBus Interface CXFA3154 diode-connected transistors typically a low-cost

发布时间:2020-04-06 09:43:38 浏览次数:721 作者:嘉泰姆
摘要:Two Remote and One Local Temperature Sensors and 3/4 Fan Controllers with SMBus Interface CXFA3154 diode-connected transistors typically a low-cost

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1.产品概述       2.产品特点     tUx嘉泰姆

3.应用范围       4.技术规格书下载(PDF文档)</span>tUx嘉泰姆

5.产品封装       6.电路原理图</strong>  tUx嘉泰姆

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The CXFA3154 contains 3 precise digital thermometers, 3/4 fan controllers, fan failure detection. The thermometers report the temperature of 2 remote sensors and 1 local sensor. The remote sensors are diode-connected transistors typically a low-cost, easily mounted 2N3904 NPN type or the diode built-in in CPU. Remote accuracy is ±1°C for multiple transistor manufacturer. Local accuracy is ±3°C. The CXFA3154 also support offset adjust function via SMBus to fix the error due to different CPU diode or parasitic resistors. The 2-wire serial interface accepts standard System Management Bus (SMBusTM) Write Byte, Read Byte, Send Byte, and Receive Byte commands. The SMBus address is 72h for write and 73h for read. CXFA3154 contains 3/4 controllers. FAN controller performs closed-loop and open-loop control. CXFA3154determines the current fan speed based on the FG inputs and an externally supplied 32.768kHz clock. The driving ability is 5mA. CXFA3154also provides ALERT for fan fail and out of control event.

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„ Measures Two Remote and One Local Temperatures tUx嘉泰姆

 „ Adjustable Offset for Each Sensor via SMBus tUx嘉泰姆

„ Accuracy: Remote ±1°C (+20°C to +80°C) ±3°C (-10°C to +120°C) tUx嘉泰姆

„ +4.5V to +5.5V Supply Range tUx嘉泰姆

„ Alert Signal for Diode Fault, Fan Fail, and Fan Out of Control tUx嘉泰姆

„ Supports SMBus Alert Response tUx嘉泰姆

„ Fan Drivers Using Linear Control Algorithm tUx嘉泰姆

„ Closed Loop Speed Control and programmable 8 Bits Open Loop Voltage Control for Fan tUx嘉泰姆

„ Wide speed control range for Fan, Accuracy within 2%, when FANx_SET_CNT > 50 tUx嘉泰姆

„ Internal Current-limit and Over-temperature Protection for the Fan Controllers tUx嘉泰姆

„ Build-In Inverters for Driving Crystal tUx嘉泰姆

„ 20-Pin TSSOP PackagetUx嘉泰姆

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