EMC2105 Series

Single Linear Fan Controller with Thermal Mgt

Catalog

Single Linear Fan Controller with Thermal Mgt

Part	Output Type	Package / Case	Supplier Device Package	Voltage - Supply [Max]	Voltage - Supply [Min]	Accuracy	Output Alarm	Sensing Temperature [Max]	Sensing Temperature [Min]	Output Fan	Function	Topology	Mounting Type	Sensor Type	Operating Temperature [Max]	Operating Temperature [Min]
Microchip Technology EMC2105-BP-TR	SMBus	20-VFQFN Exposed Pad	20-QFN-EP (4x4)	3.6 V	3 V	0.5 °C 1 °C		125 °C	0 °C		Fan Control Temp Monitor	ADC (Sigma Delta) Comparator Register Bank Tach	Surface Mount	Internal and External	85 °C	-40 °C

Catalog

Single Linear Fan Controller with Thermal Mgt

Key Features

• * 600mA, 5V, High Side Fan Driver

• * Optional fan aging detection

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

• * Allows programmed fan response to temperature

• * 1 to 4 thermal zones to control fan driver

• * Controls fan speed or fan 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 RoHS Compliant Package (4mm x 4mm)

• * Notebook Computers

• * Embedded Applications

• * Projectors

• * Industrial and Networking Equipment

Description

The EMC2105 is an SMBus compliant fan controller with up to five (up to 4 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 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 EMC2105 also includes a hardware programmable temperature limit and dedicated system shutdown output for thermal protection of critical circuitry.