The CXFA3156 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 (SMBus

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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 CXFA3156 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 70h 72h for write and 7173hh for read for CXFA3156.For CXFA3156, ADD0 pin selects 3 different SMBus addresses. (see “ SMBus Digital Interface” section) CXFA3156 contains 3/4 fan controllers which perform closed-loop and open-loop control. CXFA3156G7etermines the current fan speed based on the FG inputs and an externally supplied 32.768kHz clock. The driving ability is 5mA. XFA3156also provides ALERT for fan fail and out of control event.The CXFA3156 contains 3 precise digital thermometers, 3/4 fan controllers, fan failure detection.

   产品特点 返回TOPi4k嘉泰姆

„ Measures Two Remote and One Local Temperatures i4k嘉泰姆

 „ Adjustable Offset for Each Sensor via SMBus i4k嘉泰姆

„ Accuracy: Remote ±1°C (+20°C to +80°C) ±3°C (-10°C to +120°C) i4k嘉泰姆

„ +4.5V to +5.5V Supply Range i4k嘉泰姆

„ Alert Signal for Diode Fault, Fan Fail, and Fan Out of Control „ Supports SMBus Alert Response i4k嘉泰姆

„ Fan Drivers Using Linear Control Algorithm i4k嘉泰姆

„ Closed Loop Speed Control and programmable 8 Bits Open Loop Voltage Control for Fan i4k嘉泰姆

„ Wide speed control range for Fan, Accuracy within 2%, when FANx_SET_CNT > 50 i4k嘉泰姆

„ Internal Current-limit and Over-temperature Protection for the Fan Controllers i4k嘉泰姆

„ Build-In Inverters for Driving Crystal i4k嘉泰姆

„ Optional Internal Clock Accuracy ±3% from 20°C to 80°C at 5V VCC i4k嘉泰姆

„ 20-Pin TSSOP Packagei4k嘉泰姆

   应用范围 返回TOPi4k嘉泰姆

„ Projector, LCD TV, PDP TV i4k嘉泰姆

„ Desktop and Notebook i4k嘉泰姆

„ Central Office Computers i4k嘉泰姆

„ Telecom Equipments i4k嘉泰姆

„ Industrial Controls i4k嘉泰姆

„ LAN Serversi4k嘉泰姆

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