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PDF EMC2103 Data sheet ( Hoja de datos )

Número de pieza EMC2103
Descripción RPM-Based Fan Controller
Fabricantes Microchip　
Logotipo Microchip Logotipo



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No Preview Available ! EMC2103 Hoja de datos, Descripción, Manual

RPM-Based Fan Controller with
Hardware Thermal Shutdown
EMC2103
PRODUCT FEATURES
Datasheet
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 ±0.5°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 and EMC2103-4 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)
— ±0.5°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
— ±1°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 RoHS Compliant Package
(EMC2103-1) or 16-pin, QFN RoHS Compliant
Package (EMC2103-2 and EMC2103-4)
2013 Microchip Technology Inc.
DS0005250A-page 1

1 page




EMC2103 pdf
RPM-Based Fan Controller with Hardware Thermal Shutdown
Datasheet
List of Figures
Figure 1.1
Figure 2.1
Figure 2.2
Figure 4.1
Figure 5.1
Figure 5.2
Figure 5.3
Figure 5.4
Figure 5.5
Figure 5.6
Figure 5.7
Figure 7.1
Figure 7.2
Figure 7.3
Figure 7.4
Figure 7.5
Figure 7.6
EMC2103 Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
EMC2103-1 Pin Diagram (12-Pin QFN). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
EMC2103-2 and EMC2103-4 Pin Diagram (16-Pin QFN) . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SMBus Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
System Diagram for EMC2103 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Block Diagram of Critical / Thermal Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Fan Control Look-Up Table Example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
RPM based Fan Speed Control Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Spin Up Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Ramp Rate Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Diode Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
12-Pin QFN 4mm x 4mm Package Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
12-Pin QFN 4mm x 4mm Package Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Recommended PCB Footprint 12-Pin QFN 4mm x 4mm . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
16-Pin QFN 4mm x 4mm Package Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
16-Pin QFN 4mm x 4mm Package Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Recommended PCB Footprint 16-Pin QFN 4mm x 4mm . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
2013 Microchip Technology Inc.
DS0005250A-page 5

5 Page





EMC2103 arduino
RPM-Based Fan Controller with Hardware Thermal Shutdown
Datasheet
Table 2.1 Pin Description for EMC2103 (continued)
PIN NUMBER
EMC2103-1
N/A
4
5
6
7
8
9
10
11
12
N/A
N/A
PIN NUMBER
EMC2103-2 AND
EMC2103-4
5
6
7
8
9
10
11
12
13
14
15
16
PIN NAME
GPIO2
ALERT
SYS_SHDN
SMDATA
SMCLK
TACH
PWM
GND
SHDN_SEL
TRIP_SET
DN2 / DP3
DP2 / DN3
PIN FUNCTION
GPI2 - General Purpose Input
(default)
GPO2 - Open Drain digital output
GPO2 - Push-pull digital output
Active low interrupt - requires
external pull-up resistor.
Active low Critical / Thermal
Shutdown output - requires external
pull-up resistor
SMBus data input/output - requires
external pull-up resistor
SMBus clock input - requires
external pull-up resistor
Tachometer input for the Fan
PWM - Open Drain PWM drive
output for the Fan
(default)
PWM - Push-Pull PWM drive output
for the Fan
Ground connection
Selects the hardware shutdown
channel and operating mode
Voltage input to set the Critical /
Thermal Shutdown threshold
Negative (cathode) analog input for
External Diode 2 and positive
(anode) analog input for External
Diode 3
Positive (anode) analog input for
External Diode 2 and negative
(cathode) connection for External
Diode 3
PIN TYPE
DI (5V)
OD (5V)
DO
OD (5V)
OD (5V)
DIOD (5V)
DI (5V)
DI (5V)
OD (5V)
DO
Power
AIO
AIO
AIO
AIO
The pin type are described in detail below. All pins labelled with (5V) are 5V tolerant.
APPLICATION NOTE: For the 5V tolerant pins that have a pull-up resistor, the voltage difference between VDD and
the 5V tolerant pad must never be more than 3.6V.
2013 Microchip Technology Inc.
DS0005250A-page 11

11 Page







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