Features

• Two Programmable Fan Control circuits
  • 4-wire fan compatible
  • High speed PWM (26khz)
  • Low speed PWM (9.5Hz - 2240Hz)
  • 600mA, 5V, High Side Fan Driver
  • Optional fan aging detection
  • 1mA Linear DAC Fan Driver
• RPM based fan control algorithm
  • 2% accuracy from 500RPM to 16k RPM
• Temperature Look-Up Table
  • Allows programmed fan response to temperature
  • 1 to 4 thermal zones to control each fan driver
  • Controls fan speed or fan drive setting
  • Allows externally generated temperature data to control fan drivers including two DTS channels
• Up to Four External Temperature Channels
  • Designed to support 45nm, 60nm, and 90nm CPUs
  • Automatically detects and supports CPUs requiring the BJT or Transistor models
  • Resistance error correction
  • 1°C accurate (60°C to 100°C)
  • 0.125°C resolution
  • Detects fan aging and variation
• Three dedicated comparator outputs for External Diode 1, External Diode 2, and External Diode 3 (OVERT1#, OVERT2#, OVERT3#)
• Up to three thermistor compatible voltage inputs
• Hardware Programmable Thermal Shutdown Temperature
  • Cannot be altered by software
  • 60°C to 122°C Range or 92°C to 154°C Range
• Programmable High and Low Limits for all channels
• 3.3V Supply Voltage
• SMBus 2.0 Compliant
  • 2 selectable SMBus addresses
  • SMBus Alert compatible
  • Option to load register set from external EEPROM
• Available in 28-pin QFN package - Lead Free RoHS compliant (5mm x 5mm)

Applications

• Notebook Computers
• Embedded Applications
• Projectors
• Industrial and Networking Equipment

EMC2106 Block Diagram