Microchip Technology, Inc. EMC2103-2

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. For product comparison, please consider: EMC2113 Additional Features 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 RoHS Compliant Package (EMC2103-1) or 16-pin, QFN RoHS Compliant Package (EMC2103-2 and EMC2103-4) Applications Notebook Computers Projectors Graphics Cards Industrial and Networking Equipment