RPM-Based Fan Controller with Hardware Thermal Shutdown

Features

  • Programmable Fan Control circuit
    • 4-wire fan compatible
    • High and low frequency PWM
  • RPM based fan control algorithm
    • 2.5% accuracy from 500RPM to 16k RPM
    • Detects fan aging and variation
  • Temperature Look-Up Table
    • Allows programmed fan response to temperature
    • Controls fan speed or PWM drive setting
    • Allows externally set temperature data to drive fan
    • Supports DTS data from CPU
  • Up to Three External Temperature Channels (EMC2103-2 only)
    • Supports 45nm, 60nm, and 90nm CPU diodes
    • Automatically detects and supports CPUs requiring BJT or Transistor models
    • Resistance error correction
    • Supports discrete transistors (i.e. 2N3904)
    • 1°C accurate (60°C to 125°C)
    • 0.125°C resolution
  • Hardware Programmable Thermal Shutdown Temperature
    • Cannot be altered by software
    • 65°C to 127°C Range
  • Programmable High and Low Limits for all channels
  • Internal Temperature Monitor
    • 2°C accuracy
    • 0.125°C resolution
  • 3.3V Supply Voltage
  • SMBus 2.0 Compliant
    • SMBus Alert compatible
  • Two dedicated GPIOs (EMC2103-2 and EMC2103-4 only)
  • Available in 12-pin, QFN Lead-Free RoHS Compliant Package (EMC2103-1) or 16-pin, QFN Lead-Free RoHS Compliant Package (EMC2103-2 and EMC2103-4)

Applications

  • Notebook Computers
  • Projectors
  • Graphics Cards
  • Industrial and Networking Equipment

EMC2103 Block Diagram

2103block.gif

Although the information in this document has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to product descriptions and specifications at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order. Products may contain design defects or errors known as anomalies which may cause a product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC's website at http://www.smsc.com. SMSC and the SMSC logo are registered trademarks of Standard Microsystems Corporation ("SMSC"). Other names mentioned may be trademarks of their respective holders. All claims made herein speak as of the date of this material. The company does not undertake to update such statements.

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