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EMC2102 Datasheet(PDF) 1 Page - SMSC Corporation |
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EMC2102 Datasheet(HTML) 1 Page - SMSC Corporation |
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1 / 52 page  SMSC EMC2102 DATASHEET Revision 1.95 (10-19-06) Datasheet PRODUCT FEATURES 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 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 Beta Compensation Allows Accurate Temperature Measurement on 65nm CPU/GPUs Closed-Loop RPM Based Fan Controller — Accepts External Clock Source To Achieve 2% Accuracy Integrated Linear Fan Driver — 600mA Drive Capability HW Thermal Shutdown (SYS_SHDN#) —1 °C Incremental Set Points For Thermal Shutdown — Cannot be disabled by software Provides Reset Function (RESET#) On 5V Supply Three Remote Thermal Zones — ±1°C Accuracy (60°C to 100°C) —1 °C Resolution Resistance Error Correction On Thermal ‘Diode’ Channels — Eliminates Temperature Offset Due To Series Resistance From PCB Traces And Thermal ‘Diode’ Thermally Enhanced, 28-pin, 5x5 QFN Lead-free RoHS Compliant Package Operates From Single 3.0 - 3.6V Supply — 5V Supply For Linear Fan Driver Software Configurable ALERT# Signal For Diode Fault, Fan Stall Or System Warning APPLICATIONS Notebook Computers Desktop Computers Embedded Applications |
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