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EMC2301 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 EMC2301
기능 RPM-Based PWM Fan Controller
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EMC2301 데이터시트, 핀배열, 회로
EMC2301
RPM-Based PWM Fan Controller
PRODUCT FEATURES
Datasheet
General Description
The EMC2301 is an SMBus compliant fan controller with
a PWM fan driver. The fan driver is controlled by a
programmable frequency PWM driver and Fan Speed
Control algorithm that operates in either a closed loop
fashion or as a directly PWM-controlled device.
Each closed loop Fan Speed Control algorithm (FSC)
has the capability to detect aging fans and alert the
system. It will likewise detect stalled or locked fans and
trigger an interrupt.
Additionally, the EMC2301 offers a clock output so that
multiple devices may be chained and slaved to the
same clock source for optimal performance in large
distributed systems.
Applications
„ Servers
„ Projectors
„ Industrial and Networking Equipment
„ Notebook Computers
Features
„ Programmable Fan Control circuit (EMC2301)
— 4-wire fan compatible
— High speed PWM (26 kHz)
— Low speed PWM (9.5Hz - 2240 Hz)
— Optional detection of aging fans
— Fan Spin Up Control and Ramp Rate Control
— Alert on Fan Stall
„ Watchdog Timer
„ RPM-based fan control algorithm
— 0.5% accuracy from 500 RPM to 16k RPM (external
crystal oscillator)
— 1% accuracy from 500 RPM to 16k RPM (internal clock)
„ SMBus 2.0 Compliant
— SMBus Alert compatible
„ CLK Pin can provide a clock source output
„ Available in an 8-pin MSOP Lead-free RoHS
Compliant package
Block Diagram
CLK
TACH
Tach
Measurement
Tachometer
Limit
Registers
PWM
PWM
Drivers
Fan Speed Control Algorithm
SMBus
Slave
Protocol
SMCLK
SMDATA
ALERT#
SMSC EMC2301
DATASHEET
Revision 1.3 (05-18-11)




EMC2301 pdf, 반도체, 판매, 대치품
RPM-Based PWM Fan Controller
Datasheet
5.4
5.5
5.6
5.7
5.8
5.9
5.10
5.11
5.12
5.13
5.14
5.15
5.16
5.17
5.18
5.19
5.20
5.21
5.22
Fan Interrupt Enable Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
PWM Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.5.1 PWM Polarity Config - 2Ah . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.5.2 PWM Output Config - 2Bh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
PWM Base Frequency Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Fan Setting Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
PWM Divide Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Fan Configuration 1 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Fan Configuration 2 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Gain Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Fan Spin Up Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Fan Max Step Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Fan Minimum Drive Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Valid TACH Count Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Fan Drive Fail Band Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
TACH Target Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
TACH Reading Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Software Lock Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Product ID Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Manufacturer ID Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Revision Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Chapter 6 Typical Operating Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Chapter 7 Package Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.1 EMC2301 Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.2 Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Chapter 8 Datasheet Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Revision 1.3 (05-18-11)
4
DATASHEET
SMSC EMC2301

4페이지










EMC2301 전자부품, 판매, 대치품
RPM-Based PWM Fan Controller
Datasheet
Chapter 1 Pin Description
SMDATA 1
SMCLK 2
VDD 3
GND 4
EMC2301
8-MSOP
8 ALERT#
7 CLK
6 TACH
5 PWM
Figure 1.1 EMC2301 Pin Diagram (8 pin MSOP)
PIN NUMBER
1
2
3
4
5
6
7
8
Table 1.1 Pin Description for EMC2301
PIN NAME
SMDATA
SMCLK
VDD
GND
PWM
TACH
CLK
ALERT#
PIN FUNCTION
SMBus data input/output - requires
external pull-up resistor
SMBus clock input - requires external
pull-up resistor
Power Supply
Ground
Push-Pull PWM output driver for the Fan
Open Drain PWM output driver for the Fan
Open drain tachometer input for the Fan -
requires pull-up resistor
Clock input for tachometer measurement
Push-Pull Clock output to other fan
controllers to synchronize Fan Speed
Control
Active low interrupt - requires external
pull-up resistor.
PIN TYPE
DIOD (5V)
DI (5V)
Power
Power
DO
OD (5V)
DI (5V)
DI (5V)
DO
OD (5V)
The pin types are described in detail below. All pins labeled 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.
SMSC EMC2301
7
DATASHEET
Revision 1.3 (05-18-11)

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부품번호상세설명 및 기능제조사
EMC2300

Fan Control Device

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EMC2301

RPM-Based PWM Fan Controller

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