EMC2104

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.

Features
  • Two Programmable Fan Control circuits 4-wire fan compatible High speed PWM (26khz) Low speed PWM (9.5Hz - 2240Hz) Optional detection of aging fans
  • 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
  • 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
  • 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
  • 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
  • Hardware Programmable Thermal Shutdown Temperature Cannot be altered by software 60°C to 122°C Range or 92°C to 154°C Range
  • 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 2.0 Compliant SMBus Alert compatible
  • SMBus Alert compatible
  • Available in 20-pin QFN Package - RoHS compliant (4mm x 4mm)
  • Notebook Computers
  • Embedded Applications
  • Projectors
  • Industrial and Networking Equipment
Parameter
Parameter Name Value Value
comments Multi Fan Controller with Thermal Mgt Multi Fan Controller with Thermal Mgt
# Fans Drivers 2 2
PWM/Linear Control PWM PWM
# Remote Temperature Monitors 4 4
Ambient Temperature Sensor 1 1
Typical Accuracy ±0.25 ±0.25
Max Accuracy ±1.0 ±1.0
Maximum Temperature Range -40 to 85 -40 to 85
Vcc Range (V) 3.0 to 3.6 3.0 to 3.6
SMBus Alert Yes Yes
System Shutdown Yes Yes
Voltage Monitors Yes Yes
Documents
EMC2104 Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown Data SData Sheets02/28/20111399KB
EMC2104 Silicon Errata and Data Sheet ClarificationErrata03/27/2014182KB
AN10.14 - Using Temperature-Sensing Diodes with Remote Thermal SensorsAppNote11/17/2014250KB
AN12.14 - Remote Thermal Sensing Diode Selection GuideAppNote11/17/2014293KB
AN13.19 - Resistance Error CorrectionAppNote11/09/2014161KB
AN16.4 - Using Anti-Parallel Diodes (APD) with Microchip's Remote Temperature Sensing DevicesAppNote11/09/2014294KB
AN18.15 - PCB Design Guidelines for QFN and DQFN PackagesAppNote10/16/2014205KB
EMC2104 Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown Data BProduct Briefs02/28/2011196KB
EMC2104 Library Part, Object Library FileSchematics02/17/20096KB
EMC2104 Reference Design Schematic, PDFSchematics02/18/200926KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
EMC2104-BP-TR20QFN-40C to +85CT/R1.791.491.351.311.29
Similar Devices
Product# Fans DriversPWM/Linear Control# Remove Temp MonitorsPrice5K
EMC21021Linear1$1.01
EMC2103-11PWM1$1.01
EMC2103-21PWM1$1.12
EMC2103-41PWM1$1.12
EMC21042PWM1$1.29
EMC21051Linear1
EMC21062PWM and Linear1$1.46
EMC21121Linear1$1.07
EMC21131PWM1$1.12
EMC23011PWM0$0.67
EMC23022PWM$0.79
EMC23033PWM$0.90
EMC23055PWM$1.35
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
EMC2104-BP-TR0.0431000.21212120QFN4x4x0.9mmMatte Tine3
EMC2104 Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown Data S EMC2104
EMC2104 Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown Data S EMC2104
EMC2104 Silicon Errata and Data Sheet Clarification EMC2104
AN10.14 EMC2113
AN12.14 EMC2113
AN13.19 EMC2113
AN16.4 EMC2113
AN18.15 LAN9220
EMC2104 Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown Data B EMC2104
EMC2104 Reference Design Schematic, PDF EMC2104