EMC6D103S
Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
Features
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3.3 Volt Operation (5 Volt Tolerant
Input Buffers) |
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SMBus 2.0 Compliant Interface
(Fixed, Not Discoverable) with Three Slave Address Options |
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Fan Control
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PWM (Pulse Width Modulation)
Outputs (3) |
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Fan Tachometer Inputs
(4) |
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Programmable Automatic
Fan Control Based on Temperature |
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Backwards Compatible
with Fans Requiring Lower Frequency PWM Drive |
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High Frequency Fan Support
for 4 Wire Fans |
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One Fan Can Be Controlled
from As Many As 3 Temperature Zones |
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Fan Ramp Rate Control
for Acoustic Noise Reduction |
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Power Savings Mode
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Two Monitoring Modes:
Continuous or Cycling (for Power Savings) |
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Two Low Power Modes
When Monitoring if Off: Sleep and Shutdown |
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Temperature Monitor
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Monitoring of Two Remote
Thermal Diodes (+/- 3 Deg C Accuracy) |
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Internal Ambient Temperature
Measurement |
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Limit Comparison of
All Monitored Values |
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Interrupt Pin for Out-of-Limit
Temperature Indication |
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Voltage Monitor
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Monitor Power Supplies
(+2.5V, +5V, +12V, Vccp and VCC) |
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Limit Comparison of
All Monitored Values |
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Interrupt Pin for Out-of-Limit
Voltage Indication |
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5 VID (Voltage Identification)
Inputs |
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XOR Tree Test Mode |
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24-Pin SSOP Lead-Free RoHS Compliant Package |
ORDERING INFORMATION
Order Number(s):
EMC6D103S-CZC for 24-Pin SSOP Lead-free RoHS Compliant Package
EMC6D103S-CZC-TR for 24-Pin SSOP Lead-free RoHS Compliant Package (Tape and Reel)
Evaluation Board is Available
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General Description
The EMC6D103S is an environmental monitoring device with automatic fan control capability. This ACPI compliant device provides hardware monitoring for up to five voltages and three thermal zones, measures the speed of up to four fans, and controls the speed of multiple DC fans using Pulse Width Modulator (PWM) outputs. High frequency and low frequency PWMs are supported.
The EMC6D103S hardware monitor provides analog inputs for monitoring external voltages of +2.5V, +5V, +12V and Vccp. This device has the capability to monitor its own internal VCC power supply, which may be connected to either main power (VCC) or the suspend power well (VTR). In addition to monitoring the processor voltage, VID inputs are available to identify the voltage specification. External components are not required for voltage scaling or similar treatment.
The EMC6D103S hardware monitor includes support for monitoring three thermal zones: two external and one internal. The external temperatures are measured via thermal diode inputs capable of monitoring remote devices. In addition, they are equipped with an ambient temperature sensor for measuring the internal temperature.
Pulse Width Modulators (PWM) control the speed of the fans by varying the output duty cycle of the PWM. Each PWM can be associated with any or all of the thermal zones monitored. As the temperature of the associated zone varies, the PWM duty cycle is adjusted accordingly. The Ramp Rate Control feature controls the rate of change of the PWM output, thereby reducing system noise created by changing the fan speed. The speed of each fan is monitored by a Fan Tachometer input. The measured values are compared to values stored in Limit Registers to detect if a fan has stalled or seized.
Fan speed may be under host software control or automatic. In host control mode, the host software continuously monitors temperature and fan speed registers, makes decisions as to desired fan speed and sets the PWM's to drive the required fan speed. This device offers an interrupt output signal (INT#), which may be used to interrupt the host on out-of-limit temperature or voltage condition enabling an ACPI response as opposed to the host software continuously monitoring status. In auto "zone" mode, the logic continuously monitors the temperature and fan speeds and adjusts speeds without intervention from the host CPU. Fan speed is adjusted according to an algorithm using the temperature measured in the selected zone, the high and low limits set by the user, and the current fan speed.
 EMC6D103S Data Sheet, Application Notes,
Drivers and Design Tools
| Description |
File Name |
File Size |
Date |
 |
| EMC6D103S Data Brief |
6d103sdb.pdf |
82K |
9/25/07 |
| EMC6D103S Data Sheet |
6d103s.pdf |
1416K |
9/25/07 |
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| Evaluation Board |
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EVB-EMC6D103S
Schematic, PDF
Bill of Materials, PDF
Users Guide, PDF
|
evb6d103s_2300.pdf
evb6d103sbom.pdf
evb6d103suser.pdf
|
140K
84K
407K |
8/31/05
9/1/05
12/14/06 |
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| Application Notes |
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| Application Note 10-14: Using Temperature Sensing Diodes with EMC Devices - Remote Sensors |
an1014.pdf |
162K |
7/18/06 |
| Application Note 12-14: Remote Thermal Sensing Diode Selection Guide |
an1214.pdf |
216K |
9/9/05 |
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| Other Information |
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| Using the Adobe® Acrobat® Reader |
aacrobat.html |
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