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PDF EMC6D103S Data sheet ( Hoja de datos )

Número de pieza EMC6D103S
Descripción Fan Control Device
Fabricantes SMSC Corporation 
Logotipo SMSC Corporation Logotipo



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EMC6D103S
Fan Control Device with
High Frequency PWM
Support and Hardware
Monitoring Features
PRODUCT FEATURES
„ 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
Datasheet
„ 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
„ 5 VID (Voltage Identification) Inputs
„ XOR Tree Test Mode
„ 24-Pin SSOP Green, Lead-free Package
ORDER NUMBER(S):
EMC6D103S-CZC FOR 24 PIN, SSOP PACKAGE (LEAD-FREE)
EMC6D103S-CZC-TR FOR 24 PIN, SSOP PACKAGE (LEAD-FREE, TAPE AND REEL)
EVALUATION BOARD IS AVAILABLE
SMSC EMC6D103S
DATASHEET
Revision 0.2 (06-14-06)

1 page




EMC6D103S pdf
Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
Datasheet
List of Figures
Figure 2.1 EMC6D103S 24 Pin SSOP Pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 5.1 Address Selection on EMC6D103S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 6.3 Interrupt Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 7.1 Automatic Fan Control Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 7.2 Automatic Fan Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 7.4 Spin Up Reduction Enabled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 7.6 Illustration of PWM Ramp Rate Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 7.7 PWM and Tachometer Concept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 8.11 Fan Activity Above Low Temp Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Figure 9.1 PWMx Output Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Figure 9.4 SMBus Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Figure 10.1 24-Pin SSOP Package Outline, 0.150” Wide Body, 0.025” Pitch. . . . . . . . . . . . . . . . . . . . . . 80
Figure B.1 Fan Drive Circuitry (Apply to PWM Driving Two Fans) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Figure B.2 Fan Drive Circuitry (Apply to PWM Driving One Fan) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Figure B.3 Fan Tachometer Circuitry (Apply to Each Fan) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Figure B.4 Remote Diode (Apply to Remote2 Lines). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Figure B.5 Suggested Minimum Track Width and Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
SMSC EMC6D103S
5
DATASHEET
Revision 0.2 (06-14-06)

5 Page





EMC6D103S arduino
Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
Datasheet
Table 3.1 Pin Description (continued)
PIN # NAME
FUNCTION
BUFFER
REQUIREMENT
BUFFER PER FUNCTION
TYPE
(Note 3.1)
POWER
WELL
NOTES
HARDWARE MONITORING BLOCK (24)
11 TACH1 Input for monitoring a fan tachometer input. IM
12 TACH2 Input for monitoring a fan tachometer input. IM
9
TACH3
/INT#
Input for monitoring a fan tachometer input.
/Interrupt output to indicate a thermal
IMOD3
and/or voltage event.
14
TACH4 Input for monitoring a fan tachometer input.
/Address If in Address Select Mode, determines the
IM
Select SMBus address of the device.
24 PWM1 PWM Output 1 controlling speed of fan.
/xTest Out When in XOR tree test mode, functions as
XOR Tree output.
O8
10 PWM2 PWM Output 2 controlling speed of fan.
/INT# /Interrupt output to indicate a thermal
and/or voltage event.
OD8
13 PWM3 PWM Output 3 controlling speed of fan.
IOD8
/Address If pulled to ground at power on, enables
Enable#
Address Select Mode (Address Select pin
controls SMBus address of the device).
4 VCC Positive Power Supply. Nominal 3.3V.
VCC is monitored by the Hardware
Monitoring Block.
IM
IM
IM /OD3
IM
OD8/O8
OD8/OD8
OD8/I
VCC
VCC
VCC
VCC
VCC
VCC
VCC
(Can be powered by +3.3V Standby power
if monitoring in low power states is
required.)
3 VSS Analog Ground.
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.
SMSC EMC6D103S
11
DATASHEET
Revision 0.2 (06-14-06)

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