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PDF EMC2106 Data sheet ( Hoja de datos )
| Número de pieza | EMC2106 | |
| Descripción | Dual RPM-Based Linear Fan Controller | |
| Fabricantes | SMSC | |
| Logotipo |  |
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EMC2106
Dual RPM-Based Linear Fan
Controller with Hardware
Thermal Shutdown
PRODUCT FEATURES
Datasheet
General Description
The EMC2106 is an SMBus compliant fan controller with
up to five (up to 4 external and 1 internal) temperature
channels. The fan drivers can be operated using two
methods each with two modes. The methods include an
RPM based Fan Speed Control Algorithm and a direct
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 EMC2106 also includes a hardware programmable
temperature limitS and dedicated system shutdown
output for thermal protection of critical circuitry.
Applications
Notebook Computers
Embedded Applications
Projectors
Industrial and Networking Equipment
Features
Two Programmable Fan Control circuits
— 4-wire fan compatible
— High speed PWM (26khz)
— Low speed PWM (9.5Hz - 2240Hz)
— 600mA, 5V, High Side Fan Driver
— Optional detection of aging fans
— 1mA Linear DAC Fan Driver
RPM based fan control algorithm
— 2% accuracy from 500RPM to 16k RPM
Temperature Look-Up Table
— Allows programmed fan response to temperature
— 1 to 4 thermal zones to control each fan driver
— Controls fan speed or drive setting
— Allows externally generated temperature data to control
fan drivers including two DTS channels
Up to Four External Temperature Channels
— Designed to support 45nm, 60nm, and 90nm CPUs
— Automatically detects and supports CPUs requiring the
BJT or Transistor models
— Resistance error correction
— 1°C accurate (60°C to 100°C)
— 0.125°C resolution
— Detects fan aging and variation
Three dedicated comparator outputs for External
Diode 1, External Diode 2, and External Diode 3
(OVERT1#, OVERT2#, OVERT3#)
Up to three thermistor compatible voltage inputs
Hardware Programmable Thermal Shutdown
Temperature
— Cannot be altered by software
— 60°C to 122°C Range or 92°C to 154°C Range
Programmable High and Low Limits for all channels
3.3V Supply Voltage
SMBus 2.0 Compliant
— 2 selectable SMBus addresses
— SMBus Alert compatible
— Option to load register set from external EEPROM
Available in 28-pin QFN package - Lead Free RoHS
compliant (5mm x 5mm)
SMSC EMC2106
DATASHEET
Revision 1.78 (04-21-09)
1 page  
Dual RPM-Based Linear Fan Controller with Hardware Thermal Shutdown
Datasheet
6.49 Revision Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Chapter 7 Package Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
7.1 QFN 28-Pin 5mm x 5mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
7.2 Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Appendix A Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
A.1 Thermistor Look Up Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Appendix B Look Up Table Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
B.1 Example #1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
B.1.1 LUT Configuration Bit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
B.2 Example #2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
B.2.1 Configuration 3 Bit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
B.2.2 Fan Configuration 1 Bit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
B.2.3 Fan Spin Up Configuration Bit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
B.2.4 LUT Configuration - Bit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
B.3 Example #3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
B.3.1 Fan Configuration 1 Bit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
B.3.2 Fan Spin Up Configuration Bit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
B.3.3 LUT Configuration - Bit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Chapter 8 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
SMSC EMC2106
5
DATASHEET
Revision 1.78 (04-21-09)
5 Page 
Dual RPM-Based Linear Fan Controller with Hardware Thermal Shutdown
Datasheet
PIN NUMBER
EMC2106
1
2
3
4
5
6
7
8
SMSC EMC2106
Table 2.1 Pin Description for EMC2106
PIN NAME
DN1 / VIN1
DP1 / VREF_T1
GND
VDD
OVERT3#/ GPIO5/
PWM4
ALERT#
CLK_IN / GPIO1
OVERT2# / GPIO4 /
PWM3
PIN FUNCTION
DN1 - Negative (cathode) analog input for
External Diode 1 (default)
VIN1 - General Voltage input to be used
with a thermistor
DP1 - Positive (anode) analog input for
External Diode 1 (default)
VREF_T1 - Reference output for use with
a thermistor and to drive VIN1
Ground Connection
Power Supply
OVERT3# - Active low interrupt for the
External Diode 3 channel
(default)
GPI5 - General Purpose Input
GPO5 - General Purpose push/ pull
Output
GPO5 - General Purpose open drain
Output.
PWM4 - Open Drain PWM driver
PWM4 - Push-Pull PWM driver
Active low interrupt - requires external
pull-up resistor.
CLK_IN - 32.768KHz clock input.
GPI1 - General Purpose Input
(default)
GPO1 - General Purpose push/ pull
Output
GPO1 - General Purpose open drain
Output.
OVERT2# - Active low Interrupt for the
External Diode 2 channel
(default)
GPI4 - General Purpose Input
GPO4 - General Purpose push/ pull
Output
GPO4 - General Purpose open drain
Output.
PWM3 - Open Drain PWM driver
PWM3 - Push-Pull PWM driver
PIN TYPE
AIO (2V)
AI (2V)
AIO (2V)
AO (2V)
Power
Power
OD (5V)
DI (5V)
DO
OD (5V)
OD (5V)
DO
OD (5V)
DI (5V)
DI (5V)
DO
OD (5V)
OD (5V)
DI (5V)
DO
OD (5V)
OD (5V)
DO
11
DATASHEET
Revision 1.78 (04-21-09)
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet EMC2106.PDF ] | |
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