AMC6821 Status: ACTIVE

Temperature Monitoring and Fan Control

      
         
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Datasheet

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  • Intelligent Temperature Monitor and PWM Fan Controller (Rev. C) (amc6821.pdf, 1044 KB)
    26 Jul 2007 Download

 AMC6821
VCC(Nom)(V)3  
Supply Current(Max)(mA)1.5  
No. of Temperature Sensors2  
Pin/Package16SSOP/QSOP  
Operating Temp Range(Celsius)-40 to 125  
Temperature Sensor Accuracy(C)2 C max for +50 C to +100 C, 3 C max for -40 C to +125 C  
Temperature Sensor Resolution(C)0.125 C  
PWM Frequency(Hz)10 to 40000  
Duty Cycle Resolution(Bit)8  
Fan Speed Measurement Range(RPM)100 to 23000  
Fan Speed Measurement Accuracy(%)6  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • TMP75: Digital Temperature Sensor with 2-Wire Interface
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  • Product Information

    Features

    • Remote Temperature Sensor:
      ±2°C Accuracy, 0.125°C Resolution
    • Local Temperature Sensor:
      ±2°C Accuracy, 0.125°C Resolution
    • PWM Controller
    • PWM Frequency: 10Hz to 40kHz
      Duty Cycle: 0% to 100%, 8 Bits
    • Automatic Fan Speed Control Loops
    • SMBus Interface
    • Power: 2.7V to 5.5V
    • Package (Green): QSOP-16 (4mm × 5mm)
    • RoHS Compliant
    • APPLICATIONS
      • Notebook and Desktop PCs
      • Network Servers
      • Telecommunications Equipment
      • PC-Based Equipment
      • DLP and LCD Projectors

    DLP is a trademark of Texas Instruments.
    Pentium M, Pentium-IV are trademarks of Intel.
    JMC is a trademark of JMC Products.
    I2C is a trademark of Philips International, Inc.
    All other trademarks are the property of their respective owners.

    Description

    The AMC6821 is an intelligent temperature monitor and pulse-width modulation (PWM) fan controller. It is designed for noise-sensitive or power-sensitive applications that require active system cooling. Using either a low-frequency or a high-frequency PWM signal, this device can simultaneously drive a fan, monitor remote sensor diode temperatures, and measure and control the fan speed so that it operates with minimal acoustic noise at the lowest possible speed.

    The AMC6821 has three fan control modes: Auto Temperature-Fan mode, Software-RPM mode, and Software-DCY mode. Each mode controls the fan speed by changing the duty cycle of a PWM output. Auto Temperature-Fan mode is an intelligent, closed-loop control that optimizes fan speed according to user-defined parameters. This mode allows the AMC6821 to run as a stand-alone device without CPU intervention; the fan can continue to be controlled (based on temperature measurements) even if the CPU or system locks up. Software-RPM mode is a second closed-loop control. In this mode, the AMC6821 adjusts the PWM output to maintain a consistent fan speed at a user-specified target value; that is, the device functions as a fan speed regulator. Software-RPM mode can also be used to allow the AMC6821 to operate as a stand-alone device. The third mode, Software-DCY, is open-loop. In Software-DCY mode, the PWM duty cycle is set directly by the value written to the device.

    The AMC6821 has a programmable SMBALERT output to indicate error conditions and a dedicated FAN-FAULT output to indicate fan failure. The THERM pin is a fail-safe output for over-temperature conditions that can be used to throttle a CPU clock. Additionally, the OVR pin indicates the over-temperature limit as well. All of the alarm thresholds are set through the device registers. The AMC6821 is available in a QSOP-16 package.

        

    Pricing / Packaging / CAD Design Tools / Samples

    PricePackagingCAD Design ToolsSamples
    DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
    AMC6821SDBQACTIVE-40 to 1251.95 | 1kuSSOP/QSOP (DBQ) | 16 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
    AMC6821SDBQG4ACTIVE-40 to 1251.95 | 1kuSSOP/QSOP (DBQ) | 16 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
    AMC6821SDBQRACTIVE-40 to 1251.95 | 1kuSSOP/QSOP (DBQ) | 16 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
    AMC6821SDBQRG4ACTIVE-40 to 1251.95 | 1kuSSOP/QSOP (DBQ) | 16 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples

    * Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

    Inventory

      TI Inventory Status Reported Distributor Inventory
    AMC6821SDBQAs of 10:16 AM GMT, 19 Nov 2008As of 10:16 AM GMT, 19 Nov 2008
     In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
     0* 1298 | 17 Dec 8 Weeks AmericasAvnet 150
     >10k | 22 Jan Mouser Electronics 200
      Newark 62
      AsiaWPI 94
    AMC6821SDBQG4As of 10:16 AM GMT, 19 Nov 2008As of 10:16 AM GMT, 19 Nov 2008
     In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
     0* 1298 | 17 Dec 8 Weeks None Reported
    View Distributors
       
     >10k | 22 Jan     
    AMC6821SDBQRAs of 10:16 AM GMT, 19 Nov 2008As of 10:16 AM GMT, 19 Nov 2008
     In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
     0* >10k | 22 Jan 12 Weeks None Reported
    View Distributors
       
    AMC6821SDBQRG4As of 10:16 AM GMT, 19 Nov 2008As of 10:16 AM GMT, 19 Nov 2008
     In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
     0* >10k | 22 Jan 12 Weeks None Reported
    View Distributors
       
    View all Distributors  

    * Our information is updated daily, so please check back with us soon if this does not meet your needs. You may also contact your TI Authorized Distributor , including those listed above, for real time stock information.

    ** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

    Quality & Lead (Pb)-Free Data

     Product ContentDPPM / MTBF / FIT Rate
    DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
    AMC6821SDBQ RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
    AMC6821SDBQG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
    AMC6821SDBQR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
    AMC6821SDBQRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView

    * The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

    If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

    Technical Documents

    Datasheets

    • Intelligent Temperature Monitor and PWM Fan Controller (Rev. C) (amc6821.pdf, 1044 KB)
      26 Jul 2007 Download

    User Guides

    • AMC6821EVM and AMC6821EVM-PDK (slau195.pdf, 3308 KB)
      08 Dec 2006 Download

    Simulation Models

    • IBIS Model
      • AMC6821dbq IBIS Model (slac187.ibs, 74 KB)
        11 Aug 2008 ibis
      • | zip

    White Papers

    View White Papers for Temp Monitoring and Fan Control

    More Literature

    • Notebook Computer Guide (Rev. A) (slyy016a.pdf, 2854 KB)
      30 Sep 2008 Download

    Tools & Software

    NamePart # Company Tool / Software Type
    AMC6821EVM Evaluation ModuleAMC6821EVMTexas InstrumentsDevelopment Boards/EVMs
    AMC6821EVM-PDK Evaluation ModuleAMC6821EVM-PDKTexas InstrumentsDevelopment Boards/EVMs

     Complementary Products - Can be used with AMC6821
    Customers Who Evaluated This Product Also Evaluated...
    Part #NameProduct FamilyComments
    TMP75Digital Temperature Sensor with 2-Wire InterfaceTEMPERATURE SENSORS AND CONTROL ICs-TEMPERATURE SENSORSTI customers also evaluated this product.
    TMP100Digital Temperature Sensor with I2C Serial InterfaceTEMPERATURE SENSORS AND CONTROL ICs-TEMPERATURE SENSORSTI customers also evaluated this product.

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