EMC2102
RPM-Based Fan Controller with HW Thermal Shutdown
General Description
The EMC2102 is an SMBus, closed-loop, RPM-based fan controller/driver with hardware (HW) thermal shutdown and reset controller. The EMC2102 is
packaged in a thermally enhanced, compact, 5x5, 28-pin lead-free RoHS compliant QFN package.
The EMC2102 utilizes Beta Compensation (an implementation of the BJT or transistor model for thermal diodes) and Resistance Error Correction (REC) to accurately monitor three external temperature zones. These features allow great accuracy for CPU substrate thermal diodes on multiple process geometries as well as with discrete diode-connected transistors. Both Beta Compensation and REC can be disabled on the EMC2102 to maintain accuracy when monitoring AMD thermal diodes.
The EMC2102 includes a closed-loop RPM based Fan Control Algorithm that integrates a linear fan driver capable of sourcing 600mA of current. The fan control algorithm is designed to work with fans that operate up to 16,000 RPMs.
The EMC2102 provides a stand-alone HW thermal shutdown block. The HW thermal shutdown logic can be configured for a few common configurations based on
the strapping level of the SHDN_SEL pin on the PCB. The HW thermal shutdown point can be set in 1°C increments by using a discrete resistor divider implemented on the TRIP_SET pin.
The EMC2102 also provides 5V supply ‘power good’ function with a threshold of 4.5V. This function is provided on the RESET# pin.
Features
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Designed to support 45nm, 65nm, and 90nm CPU Diodes |
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Supports BJT and transistor models for diode channels |
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Closed-Loop RPM Based Fan Controller
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Accepts External Clock Source To Achieve 2% Accuracy
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Integrated Linear Fan Driver
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600mA Drive Capability |
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HW Thermal Shutdown (SYS_SHDN#)
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1°C Incremental Set Points For Thermal Shutdown |
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Cannot be disabled by software |
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Provides Reset Function (RESET#) On 5V Supply |
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Three Remote Thermal Zones
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±1°C Accuracy (60°C to 100°C) |
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1°C Resolution |
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Resistance Error Correction On Thermal 'Diode' Channels
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Eliminates Temperature Offset Due To Series Resistance From PCB Traces And Thermal 'Diode' |
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Thermally Enhanced, 28-pin, 5x5 QFN Lead-free RoHS Compliant Package
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Operates From Single 3.0 - 3.6V Supply
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5V Supply For Linear Fan Driver |
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Software Configurable ALERT# Signal For Diode Fault, Fan Stall Or System Warning |
Applications
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Notebook Computers |
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Desktop Computers |
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Embedded Applications |
EMC2102 Block Diagram
ORDERING INFORMATION
Order Number:
EMC2102-DZK for 28-Pin QFN Lead-Free RoHS Compliant Package (Address - 011_1101)
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 EMC2102 Data Sheet, Application Notes,
Drivers and Design Tools
| Description |
File Name |
File Size |
Date |
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| EMC2102 Data Brief |
2102db.pdf |
237K |
5/17/07 |
| EMC2102 Data Sheet |
2102.pdf |
914K |
5/17/07 |
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| Evaluation Board |
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EVB-EMC2102
Schematic, PDF
Bill of Materials, PDF
Users Guide, PDF
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evb2102sch.pdf
evb2102bom.pdf
evb2102user.pdf
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114K
19K
689K |
10/9/06
10/9/06
12/13/06 |
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| User Manual |
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| Fan Speed Control with the EMC2102 Device |
emc2102um.pdf |
4407K |
9/17/07 |
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| Application Notes |
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| Application Note 10-14: Using Temperature Sensing Diodes with EMC Devices - Remote Sensors |
an1014.pdf |
162K |
7/18/06 |
| Application Note 12-14: Remote Thermal Sensing Diode Selection Guide |
an1214.pdf |
216K |
9/9/05 |
| Application Note 15-10: Power and Layout Considerations for EMC2102 |
an1510.pdf |
234K |
8/17/07 |
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| Other Information |
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| Using the Adobe® Acrobat® Reader |
aacrobat.html |
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