EMC2104 Series

EMC2104

Catalog

EMC2104

Part	Voltage - Supply [Max]	Voltage - Supply [Min]	Output Alarm	Output Type	Mounting Type	Sensor Type	Output Fan	Accuracy	Package / Case	Supplier Device Package	Topology	Operating Temperature [Max]	Operating Temperature [Min]	Function
Microchip Technology EMC2104-BP-TR	5.5 V	3 V		2-Wire SMBus	Surface Mount	Internal and External		2 °C	20-VFQFN Exposed Pad	20-QFN (4x4)	ADC (Sigma Delta) Comparator Register Bank Tach	85 °C	-40 °C	Fan Control Temp Monitor

Catalog

EMC2104

Key Features

• * 4-wire fan compatible

• * High speed PWM (26khz)

• * Low speed PWM (9.5Hz - 2240Hz)

• * Optional detection of aging fans

• * 2% accuracy from 500RPM to 16k RPM

• * 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

• * 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

• * 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 Alert compatible

• * Available in 20-pin QFN Package - RoHS compliant (4mm x 4mm)

• * Notebook Computers

• * Embedded Applications

• * Projectors

• * Industrial and Networking Equipment

Description

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 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 EMC2104 also includes a hardware programmable temperature limits and dedicated system shutdown output for thermal protection of critical circuitry.