SMSC EMC2103 PRODUCT PREVIEW Revision 0.93 (01-08-10)
Data Brief
PRODUCT FEATURES
EMC2103
RPM-Based Fan Controller with
Hardware Thermal Shutdown
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)
ORDER NUMBERS:
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
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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
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ORDERING NUMBER PACKAGE FEATURES
EMC2103-1-KP-TR 12-pin, QFN Lead-Free, ROHS
Compliant
One external diode, RPM based
Fan Speed Control Algorithm, High
Frequency PWM driver, HW
Thermal / Critical shutdown,
EEPROM Load disabled
EMC2103-2-AP-TR 16-pin, QFN Lead-Free, ROHS
Compliant
Up to three external diodes, RPM
based Fan Speed Control algorithm,
High Frequency PWM driver, HW
Thermal / Critical shutdown, 2
GPIOs, EEPROM Load disabled
EMC2103-4-AP-TR 16-pin, QFN Lead-Free, ROHS
Compliant
Up to three external diodes, RPM
based Fan Speed Control algorithm,
High Frequency PWM driver, HW
Thermal / Critical shutdown, 2
GPIOs, EEPROM Load enabled
RPM-Based Fan Controller with Hardware Thermal Shutdown
Revision 0.93 (01-08-10) 2 SMSC EMC2103
PRODUCT PREVIEW
RPM-Based Fan Controller with Hardware Thermal Shutdown
SMSC EMC2103 3 Revision 0.93 (01-08-10)
PRODUCT PREVIEW
Block Diagram
Figure 1 EMC2103 Block Diagram
Analog
Mux
External
Temp
Diodes
Internal
Temp
Diode
11 bit Σ Δ
ADC
Temp Registers
SMBus
Slave
Protocol
Configuration
DP1
DN1
SMCLK
SMDATA
Temp Limit
Registers
Thermal
Shutdown
Logic
Tach
TACH
Lookup
Table / RPM
Control
VDD
GND
PWM
driver
PWM
DP2 / DN3*
DN2 / DP3*
* denote EMC2103-2 pins only
SYS_SHDN
ALERT
SHDN_SEL
TRIP_SET
GPIO
GPIO1*
GPIO2*
RPM-Based Fan Controller with Hardware Thermal Shutdown
Revision 0.93 (01-08-10) 4 SMSC EMC2103
PRODUCT PREVIEW
Package Outline
EMC2103-1 Package Information
Figure 2 Preliminary 12-Pin QFN 4mm x 4mm Package Dimensions
RPM-Based Fan Controller with Hardware Thermal Shutdown
Revision 0.93 (01-08-10) 5 SMSC EMC2103
PRODUCT PREVIEW
Figure 3 Preliminary 12-Pin QFN 4mm x 4mm Package Drawing
RPM-Based Fan Controller with Hardware Thermal Shutdown
Revision 0.93 (01-08-10) 6 SMSC EMC2103
PRODUCT PREVIEW
Figure 4 Recommended PCB Footprint 12-Pin QFN 4mm x 4mm
RPM-Based Fan Controller with Hardware Thermal Shutdown
SMSC EMC2103 7 Revision 0.93 (01-08-10)
PRODUCT PREVIEW
EMC2103-2 Package Information
Figure 5 Preliminary 16-Pin QFN 4mm x 4mm Package Dimensions
SMSC EMC2103 8 Revision 0.93 (01-08-10)
PRODUCT PREVIEW
RPM-Based Fan Controller with Hardware Thermal Shutdown
Figure 6 Preliminary 16-Pin QFN 4mm x 4mm Package Drawing
RPM-Based Fan Controller with Hardware Thermal Shutdown
SMSC EMC2103 9 Revision 0.93 (01-08-10)
PRODUCT PREVIEW
Figure 7 Recommended PCB Footprint 16-Pin QFN 4mm x 4mm
