EMC2112-BP-TR Microchip

EMC2112 RPM-Based Linear Fan Controller with Hardware Thermal Shutdown Datasheet PRODUCT FEATURES General Description Applications Notebook Computers The EMC2112 is an SMBus, closed-loop, RPM-based fan driver with hardware (HW) thermal shutdown and Desktop Computers reset controller. The EMC2112 offers a single High Side Embedded Applications fan driver capable of sourcing up to 600mA from a 5V supply. Features Closed-Loop RPM-Based Fan Controller The EMC2112 utilizes Beta Compensation (an 1% accuracy with external clock input implementation of the BJT or transistor model for 3% accuracy with internal clock thermal diodes) and Resistance Error Correction (REC) Internal clock can be used as a source to accurately monitor up to three (3) external Aging fan detection temperature zones. These features allow great accuracy Integrated Linear Fan Driver for CPU substrate thermal diodes on multiple process 600mA drive capability geometries as well as with discrete diode-connected HW Thermal Shutdown (SYS SHDN) transistors. Both Beta Compensation and REC can be 1C incremental set points for thermal shutdown disabled on the EMC2112 to maintain accuracy when Cannot be disabled by software monitoring AMD thermal diodes. Provides Reset Function (RESET) On 5V Supply The EMC2112 provides a stand-alone HW thermal Up to Three (3) Remote Thermal Zones shutdown block. The HW thermal shutdown logic can be 1C accuracy (60C to 100C) configured for a few common configurations based on 0.125C resolution the strapping level of the SHDN SEL pin on the PCB. Designed to support 45nm, 65nm, and 90nm CPU Diodes using BJT and transistor model The HW thermal shutdown point can be set in 1C Eliminates temperature offset due to series resistance increments by using a discrete resistor connected to the from PCB traces and thermal Diode TRIP SET pin. Operates From Single 3.0 - 3.6V Supply The EMC2112 also provides 5V supply power good 5V supply for linear fan driver and reset generator 2 function with a threshold of 4.5V. This function is SMBus 2.0 and I C compatible provided on the RESET pin. User selectable SMBus address using pull-up resistor on ADDR SEL pin Supports Block Read and Write functionality Available in 20-pin, 4x4 QFN Lead-free RoHS Compliant package SMSC EMC2112 DATASHEET Revision 0.88 (11-20-09) RPM-Based Linear Fan Controller with Hardware Thermal Shutdown Datasheet ORDERING INFORMATION: ORDERING NUMBER PACKAGE FEATURES EMC2112-BP-TR 20-pin QFN 4mm x 4mm Three External Diodes. High Side Fan driver (Lead-Free RoHS w/ RPM based Fan Speed Control algorithm. compliant) Reset generator. Hardware set critical temperature limit REEL SIZE IS 4,000 PIECES This product meets the halogen maximum concentration values per IEC61249-2-21 For RoHS compliance and environmental information, please visit www.smsc.com/rohs Please contact your SMSC sales representative for additional documentation related to this product such as application notes, anomaly sheets, and design guidelines. Copyright 2009 SMSC or its subsidiaries. All rights reserved. Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC s standard Terms of Sale Agreement dated before the date of your order (theTerms of Sale Agreemen). The product may contain design defects or errors known as anomalies which may cause the product s functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSCs website at