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EMC2103
RPM-Based Fan Controller with Hardware Thermal Shutdown
PRODUCT FEATURES
General Description
The EMC2103 is an SMBus compliant fan controller with up to up to 3 external and 1 internal temperature channels. The fan driver can be operated using two methods each with two modes. The methods include an RPM based Fan Speed Control Algorithm and a direct PWM 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 1C 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 EMC2103 also includes a hardware programmable temperature limit and dedicated system shutdown output for thermal protection of critical circuitry.
Data Brief
Features
Programmable Fan Control circuit
-- 4-wire fan compatible -- High and low frequency PWM
RPM based fan control algorithm
-- 2.5% accuracy from 500RPM to 16k RPM -- Detects fan aging and variation
Temperature Look-Up Table
-- -- -- -- Allows programmed fan response to temperature Controls fan speed or PWM drive setting Allows externally set temperature data to drive fan Supports DTS data from CPU
Up to Three External Temperature Channels (EMC2103-2 only)
-- Supports 45nm, 60nm, and 90nm CPU diodes -- Automatically detects and supports CPUs requiring BJT or Transistor models -- Resistance error correction -- Supports discrete transistors (i.e. 2N3904) -- 1C accurate (60C to 125C) -- 0.125C resolution
Applications
Notebook Computers Projectors Graphics Cards Industrial and Networking Equipment
Hardware Programmable Thermal Shutdown Temperature
-- Cannot be altered by software -- 65C to 127C Range
Programmable High and Low Limits for all channels Internal Temperature Monitor
-- 2C accuracy -- 0.125C resolution
3.3V Supply Voltage SMBus 2.0 Compliant
-- SMBus Alert compatible
Two dedicated GPIOs (EMC2103-2 and EMC2103-4 only) Available in 12-pin, QFN Lead-Free RoHS Compliant Package (EMC2103-1 and EMC2103-3) or 16-pin, QFN Lead-Free RoHS Compliant Package (EMC2103-2 and EMC2103-4)
SMSC EMC2103
PRODUCT PREVIEW
Revision 0.93 (01-08-10)
RPM-Based Fan Controller with Hardware Thermal Shutdown
ORDER NUMBERS:
ORDERING NUMBER EMC2103-1-KP-TR PACKAGE 12-pin, QFN Lead-Free, ROHS Compliant FEATURES One external diode, RPM based Fan Speed Control Algorithm, High Frequency PWM driver, HW Thermal / Critical shutdown, EEPROM Load disabled Up to three external diodes, RPM based Fan Speed Control algorithm, High Frequency PWM driver, HW Thermal / Critical shutdown, 2 GPIOs, EEPROM Load disabled Up to three external diodes, RPM based Fan Speed Control algorithm, High Frequency PWM driver, HW Thermal / Critical shutdown, 2 GPIOs, EEPROM Load enabled
EMC2103-2-AP-TR
16-pin, QFN Lead-Free, ROHS Compliant
EMC2103-4-AP-TR
16-pin, QFN Lead-Free, ROHS Compliant
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
80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright (c) 2010 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 0.93 (01-08-10)
PRODUCT PREVIEW
2
SMSC EMC2103
RPM-Based Fan Controller with Hardware Thermal Shutdown
Block Diagram
SYS_SHDN
SHDN_SEL
TRIP_SET
GPIO1*
DP1 DN1 DP2 / DN3* DN2 / DP3*
External Temp Diodes Analog Mux
Thermal Shutdown Logic
GPIO
Temp Limit Registers 11 bit ADC SMBus Slave Protocol
GPIO2*
GND
VDD
SMCLK SMDATA ALERT
Internal Temp Diode Configuration PWM driver
Temp Registers
PWM
TACH
Tach
Lookup Table / RPM Control
* denote EMC2103-2 pins only
Figure 1 EMC2103 Block Diagram
SMSC EMC2103
PRODUCT PREVIEW
3
Revision 0.93 (01-08-10)
RPM-Based Fan Controller with Hardware Thermal Shutdown
Package Outline
EMC2103-1 Package Information
Figure 2 Preliminary 12-Pin QFN 4mm x 4mm Package Dimensions
Revision 0.93 (01-08-10)
PRODUCT PREVIEW
4
SMSC EMC2103
RPM-Based Fan Controller with Hardware Thermal Shutdown
Revision 0.93 (01-08-10)
5 PRODUCT PREVIEW
SMSC EMC2103
Figure 3 Preliminary 12-Pin QFN 4mm x 4mm Package Drawing
RPM-Based Fan Controller with Hardware Thermal Shutdown
Figure 4 Recommended PCB Footprint 12-Pin QFN 4mm x 4mm
Revision 0.93 (01-08-10)
PRODUCT PREVIEW
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SMSC EMC2103
RPM-Based Fan Controller with Hardware Thermal Shutdown
EMC2103-2 Package Information
Figure 5 Preliminary 16-Pin QFN 4mm x 4mm Package Dimensions
SMSC EMC2103
PRODUCT PREVIEW
7
Revision 0.93 (01-08-10)
RPM-Based Fan Controller with Hardware Thermal Shutdown
SMSC EMC2103
Figure 6 Preliminary 16-Pin QFN 4mm x 4mm Package Drawing
8 PRODUCT PREVIEW Revision 0.93 (01-08-10)
RPM-Based Fan Controller with Hardware Thermal Shutdown
Figure 7 Recommended PCB Footprint 16-Pin QFN 4mm x 4mm
SMSC EMC2103
PRODUCT PREVIEW
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Revision 0.93 (01-08-10)

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