The EMC2103 is an SMBus compliant fan controller with up to up to 3 external and 1 internal temperature channels. The fan driver can be operated using two methods each with two modes. The methods include an RPM based Fan Speed Control Algorithm and a direct PWM drive setting. The modes include manually programming the desired settings or using the internal programmable temperature look-up table to select the desired setting based on measured temperature.

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 EMC2103 also includes a hardware programmable temperature limit and dedicated system shutdown output for thermal protection of critical circuitry.

• 4-wire fan compatible
• High and low frequency PWM
• 2.5% accuracy from 500RPM to 16k RPM
• Detects fan aging and variation
• 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
• 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
• Cannot be altered by software
• 65°C to 127°C Range
• Programmable High and Low Limits for all channels
• 2°C accuracy
• 0.125°C resolution
• 3.3V Supply Voltage
• SMBus Alert compatible
• Two dedicated GPIOs (EMC2103-2 and EMC2103-4 only)
• Available in 12-pin, QFN RoHS Compliant Package (EMC2103-1) or 16-pin, QFN RoHS Compliant Package (EMC2103-2 and EMC2103-4)
• Notebook Computers
• Projectors
• Graphics Cards
• Industrial and Networking Equipment