产品概述 返回TOPhbQ嘉泰姆

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. CXFA3157 contains 3/4 controllers. FAN controller performs closed-loop and open-loop control. CXFA3157determines the current fan speed based on the FG inputs and an externally supplied 32.768kHz clock. The driving ability is 5mA. CXFA3157also provides ALERT for fan fail and out of control event.The CXFA3157contains 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 CXFA3157also support offset adjust function via SMBus to fix the error due to different CPU diode or parasitic resistors.

   产品特点 返回TOPhbQ嘉泰姆

„ Measures Two Remote and One Local Temperatures hbQ嘉泰姆

 „ Adjustable Offset for Each Sensor via SMBus hbQ嘉泰姆

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

„ +4.5V to +5.5V Supply Range hbQ嘉泰姆

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

„ Supports SMBus Alert Response hbQ嘉泰姆

„ Fan Drivers Using Linear Control Algorithm hbQ嘉泰姆

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

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

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

„ Build-In Inverters for Driving Crystal hbQ嘉泰姆

„ 20-Pin TSSOP PackagehbQ嘉泰姆

   应用范围 返回TOPhbQ嘉泰姆

„ Projector, LCD TV, PDP TV hbQ嘉泰姆

„ Desktop and Notebook hbQ嘉泰姆

„ Central Office Computers hbQ嘉泰姆

„ Telecom Equipments hbQ嘉泰姆

„ Industrial Controls hbQ嘉泰姆

„ LAN ServershbQ嘉泰姆

   技术规格书（产品PDF) 返回TOP hbQ嘉泰姆

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