EMC2104-BP-TR

The EMC2104 is an SMBus compliant fan controller with up to five (4 external and 1 internal) temperature channels. The fan drivers can be operated using two methods each with two modes. The methods include an RPM based Fan Speed Control Algorithm and a direct fan drive setting. The temperature monitors offer 1°C accuracy (for external diodes) with sophisticated features to reduce errors introduced by series resistance and beta variation of substrate thermal diode transistors commonly found in processors. The EMC2104 also includes a hardware programmable temperature limits and dedicated system shutdown output for thermal protection of critical circuitry.

• Two Programmable Fan Control circuits
  • 4-wire fan compatible
  • High speed PWM (26khz)
  • Low speed PWM (9.5Hz - 2240Hz)
  • Optional detection of aging fans
• 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 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
• Up to three thermistor compatible voltage inputs