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PDF EMC2300 Data sheet ( Hoja de datos )
| Número de pieza | EMC2300 | |
| Descripción | Fan Control Device | |
| Fabricantes | SMSC Corporation | |
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EMC2300
Fan Control Device with
High Frequency PWM and
Temperature Monitors
PRODUCT FEATURES
Datasheet
3.3 Volt Operation (5 Volt Tolerant Input Buffers)
SMBus 2.0 Compliant Interface (Fixed, not
Discoverable) with Three Slave Address Options
Fan Control
— PWM (Pulse width Modulation) Outputs (3)
— Fan Tachometer Inputs (4)
— Programmable automatic fan control based on
temperature
— Backwards compatible with fans requiring lower
frequency PWM drive
— High frequency fan support for 4 wire fans
— One fan can be controlled from as many as 3
temperature zones
— Fan ramp rate control for acoustic noise reduction
Power Savings Modes
— Two monitoring modes: continuous or cycling (for power
savings)
— Two low power modes when monitoring if off: Sleep and
Shutdown
Temperature Monitor
— Monitoring of Two Remote Thermal Diodes (+/- 3 deg
C accuracy)
— Internal Ambient Temperature Measurement
— Limit Comparison of all Monitored Values
— Interrupt Pin for out-of-limit Temperature Indication
Voltage Monitor
— Monitors VCC and VCCP
— Limit Comparison of all Monitored Values
— Interrupt Pin for out-of-limit Voltage Indication
XOR Tree Test Mode
16-Pin SSOP Lead-Free RoHS Compliant Package
ORDER NUMBERS:
EMC2300-AZC FOR 16 PIN, SSOP LEAD-FREE ROHS COMPLIANT PACKAGE
EMC2300-AZC-TR FOR 16 PIN, SSOP LEAD-FREE ROHS COMPLIANT PACKAGE (TAPE AND REEL)
2,800 UNITS FOR 13 INCH REEL, 97 UNITS PER TUBE
SMSC EMC2300
DATASHEET
Revision 0.32 (06-23-08)
1 page  
Fan Control Device with High Frequency PWM and Temperature Monitors
Datasheet
List of Figures
Figure 2.1 EMC2300 16 Pin SSOP Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 5.1 Address Selection on EMC2300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 6.1 Interrupt Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 7.1 Automatic Fan Control Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 7.2 Automatic Fan Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 7.3 Spin Up Reduction Enabled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 7.4 Illustration of PWM Ramp Rate Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 7.5 PWM and Tachometer Concept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 8.1 Fan Activity Above Low Temp Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Figure 9.1 PWMx Output Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Figure 9.2 SMBus Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Figure 10.1 16 Pin SSOP Package Outline and Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Figure B.1 Fan Drive Circuitry (Apply to PWM Driving Two Fans) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Figure B.2 Fan Drive Circuitry (Apply to PWM Driving One Fan) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Figure B.3 Fan Tachometer Circuitry (Apply to Each Fan) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Figure B.4 Remote Diode (Apply to Remote2 Lines). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Figure B.5 Suggested Minimum Track Width and Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
SMSC EMC2300
5
DATASHEET
Revision 0.32 (06-23-08)
5 Page 
Fan Control Device with High Frequency PWM and Temperature Monitors
Datasheet
Note: The “#” as the suffix of a signal name indicates an “Active Low” signal.
Note 3.1 Buffer types per function on multiplexed pins are separated by a slash “/” Buffer types in
parenthesis represent multiple buffer types for a single pin function.
Note 3.2 This analog input is backdrive protected.
3.2 Buffer Type Description
Note: The buffer type values are specified at VCC=3.3V
Table 3.2 Buffer Type Descriptions
BUFFER TYPE
IM
IAN
IMOD3
O8
OD8
IO8
DESCRIPTION
Digital Input
Analog Input, Hardware Monitoring Block
Input/Output (Open Drain), 3mA sink.
Output, 8mA sink, 4mA source.
Output (Open Drain), 8mA sink.
Input/Output, 8mA sink, 4mA source.
3.3
3.3V Operation, 5V Tolerance
The EMC2300 is intended to operate with a nominal 3.3V power supply. The analog voltage pins are
connected to voltage sources at their respective nominal levels. All digital signal pins are 3V switching,
but are tolerant to 5V.
SMSC EMC2300
11
DATASHEET
Revision 0.32 (06-23-08)
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet EMC2300.PDF ] | |
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