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EMC2112 Datasheet Preview

EMC2112 Datasheet

RPM-Based Linear Fan Controller

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EMC2112
RPM-Based Linear Fan
Controller with Hardware
Thermal Shutdown
PRODUCT FEATURES
Datasheet
General Description
The EMC2112 is an SMBus, closed-loop, RPM-based
fan driver with hardware (HW) thermal shutdown and
reset controller. The EMC2112 offers a single High Side
fan driver capable of sourcing up to 600mA from a 5V
supply.
The EMC2112 utilizes Beta Compensation (an
implementation of the BJT or transistor model for
thermal diodes) and Resistance Error Correction (REC)
to accurately monitor up to three (3) 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 EMC2112 to maintain accuracy when
monitoring AMD thermal diodes.
The EMC2112 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 connected to the
TRIP_SET pin.
The EMC2112 also provides 5V supply ‘power good’
function with a threshold of 4.5V. This function is
provided on the RESET pin.
Applications
„ Notebook Computers
„ Desktop Computers
„ Embedded Applications
Features
„ Closed-Loop RPM-Based Fan Controller
— 1% accuracy with external clock input
— 3% accuracy with internal clock
— Internal clock can be used as a source
— Aging fan detection
„ 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
„ Up to Three (3) Remote Thermal Zones
±1°C accuracy (60°C to 100°C)
— 0.125°C resolution
— Designed to support 45nm, 65nm, and 90nm CPU
Diodes using BJT and transistor model
— Eliminates temperature offset due to series resistance
from PCB traces and thermal ‘Diode’
„ Operates From Single 3.0 - 3.6V Supply
— 5V supply for linear fan driver and reset generator
„ SMBus 2.0 and I2C compatible
— 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)




SMSC Corporation

EMC2112 Datasheet Preview

EMC2112 Datasheet

RPM-Based Linear Fan Controller

No Preview Available !

RPM-Based Linear Fan Controller with Hardware Thermal Shutdown
Datasheet
ORDERING INFORMATION:
ORDERING NUMBER
EMC2112-BP-TR
PACKAGE
20-pin QFN 4mm x 4mm
(Lead-Free RoHS
compliant)
FEATURES
Three External Diodes. High Side Fan driver
w/ RPM based Fan Speed Control algorithm.
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 (the "Terms of Sale Agreement"). 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 SMSC’s website at http://www.smsc.com. SMSC is a registered
trademark of Standard Microsystems Corporation (“SMSC”). Product names and company names are the trademarks of their respective holders.
SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE
OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL
DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT;
TORT; NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD
TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Revision 0.88 (11-20-09)
2
DATASHEET
SMSC EMC2112


Part Number EMC2112
Description RPM-Based Linear Fan Controller
Maker SMSC Corporation
PDF Download

EMC2112 Datasheet PDF






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