EMC2103 Datasheet PDF - SMSC

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EMC2103
SMSC

Part Number EMC2103
Description RPM-Based Fan Controller
Page 9 Pages


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EMC2103
RPM-Based Fan Controller with
Hardware Thermal Shutdown
PRODUCT FEATURES
Data Brief
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 1°C 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.
Applications
„ Notebook Computers
„ Projectors
„ Graphics Cards
„ Industrial and Networking Equipment
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)
— 1°C accurate (60°C to 125°C)
— 0.125°C resolution
„ Hardware Programmable Thermal Shutdown
Temperature
— Cannot be altered by software
— 65°C to 127°C Range
„ Programmable High and Low Limits for all channels
„ Internal Temperature Monitor
— 2°C accuracy
— 0.125°C 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
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RPM-Based Fan Controller with Hardware Thermal Shutdown
ORDER NUMBERS:
ORDERING NUMBER
EMC2103-1-KP-TR
EMC2103-2-AP-TR
EMC2103-4-AP-TR
PACKAGE
12-pin, QFN Lead-Free, ROHS
Compliant
16-pin, QFN Lead-Free, ROHS
Compliant
16-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
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 © 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.
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RPM-Based Fan Controller with Hardware Thermal Shutdown
Block Diagram
DP1
DN1
DP2 / DN3*
DN2 / DP3*
PWM
TACH
External
Temp
Diodes
Analog
Mux
Internal
Temp
Diode
PWM
driver
Tach
Thermal
Shutdown
Logic
11 bit Σ Δ
ADC
Temp Limit
Registers
Temp Registers
Configuration
Lookup
Table / RPM
Control
* denote EMC2103-2 pins only
Figure 1 EMC2103 Block Diagram
GPIO
SMBus
Slave
Protocol
SMCLK
SMDATA
ALERT
SMSC EMC2103
3
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Package Outline
RPM-Based Fan Controller with Hardware Thermal Shutdown
EMC2103-1 Package Information
Figure 2 Preliminary 12-Pin QFN 4mm x 4mm Package Dimensions
Revision 0.93 (01-08-10)
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SMSC EMC2103



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