Benutzerhandbuch für SMSC EMC2102

Inhaltsverzeichnis

• 1 Overview

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• 2 Audience

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• 3 References

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• 4 The Evaluation System

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  • Figure 4.1 EMC2102 Fan Control Evaluation System

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  • Figure 4.2 EVB-EMC2102 Board

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• 5 Basic Operation Experiments

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  • 5.1 Experiment 1 - Manual Fan Control

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    • 5.1.1 ChipMan Installation

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    • 5.1.2 Setting Up the ChipMan

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      • Figure 5.1 ChipMan Message for First Operation

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      • Figure 5.2 ChipMan Device Selection Window

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      • Figure 5.3 Selecting the Device and Master Controller Type

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      • Figure 5.4 ChipMan Operation Window

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      • Figure 5.5 Changing Fan Speed

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    • 5.1.3 Plotting From ChipMan

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      • Figure 5.6 Plotting from the ChipMan

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      • Figure 5.7 Plot Windows

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      • Figure 5.8 Plot Examples

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  • 5.2 Experiment 2 - RPM Based Closed-Loop Fan Control

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    • 5.2.1 Getting Started

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    • 5.2.2 Basic RPM Based Fan Control

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      • Figure 5.9 Plots for Proper Control Settings

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    • 5.2.3 Effects of Loading

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      • Figure 5.10 Effects of Loading

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    • 5.2.4 Register Change Summary

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      • Table 5.1 Register Change Summary for Experiment 2

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  • 5.3 Experiment 3 - Spin-up Configuration Options

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    • 5.3.1 Fan Control Parameters

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      • Figure 5.11 Fan Control Parameters

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    • 5.3.2 Getting Started

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    • 5.3.3 Forced Kick Function

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      • Figure 5.12 Forced Kick Function

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    • 5.3.4 Spin-Up Level

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      • Figure 5.13 60% Spin Level Setting

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    • 5.3.5 Spin-Up Time

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      • Figure 5.14 Reduced Spin-up Time

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    • 5.3.6 Register Change Summary

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      • Table 5.2 Register Change Summary for Experiment 3

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  • 5.4 Experiment 4 - RPM Drive Mode Rate Controls

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    • 5.4.1 General Setup

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    • 5.4.2 Controlling the Ramp Rate

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      • Figure 5.15 Default Ramp Rate

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      • Figure 5.16 Default Step Size with Different UPDATE Settings

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      • Figure 5.17 Default UPDATE with Different Step Size Settings

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      • Figure 5.18 Exceptionally Slow Rate

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    • 5.4.3 Register Change Summary

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      • Table 5.3 Register Change Summary for Experiment 4

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  • 5.5 Experiment 5 - Optimizing RPM Control Response

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    • 5.5.1 General Setup

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    • 5.5.2 Fan Configuration Register (52h)

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      • Figure 5.19 Update Time Modifications

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    • 5.5.3 FAN Minimum Drive Register (55h) and Valid TACH Count (56h)

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      • Figure 5.20 Minimum Drive Setting

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      • Figure 5.21 Valid Tach Count Setting

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    • 5.5.4 Register Change Summary

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      • Table 5.4 Register Change Summary for Experiment 7

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  • 5.6 Experiment 6 - Limits and Alerts

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    • 5.6.1 General Setup

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    • 5.6.2 Fan Spin and Stall Interrupts

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      • Figure 5.22 Fan Spin and Stall

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    • 5.6.3 Register Change Summary

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  • 5.7 Experiment 7 - Troubleshooting

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    • 5.7.1 Repetitious Spin-up Routine Caused by Incorrect Settings

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      • Figure 5.23 Fan Spin-up Routine Restarted Repeatedly

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      • Figure 5.24 Theoretical Plot of Case 1

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      • Figure 5.25 Spin-up Case 1 Fix 1

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      • Figure 5.26 Spin-up Case 1 Fix 2

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      • Figure 5.27 Theoretical Plot of Case 2

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      • Figure 5.28 Spin-up Case 2

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      • Figure 5.29 Theoretical Plot of Case 3

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      • Figure 5.30 Spin-up Case 3

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      • Figure 5.31 Spin-up Routine Restarted During Normal Operation

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      • Figure 5.32 Theoretical Plot of Case 4

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      • Figure 5.33 Spin-up Case 4

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      • Figure 5.34 Spin-up Case 5

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      • Figure 5.35 Spin-up Case 5 Fix

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• 6 Appendix

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  • 6.1 DC Fan Basics - Poles, Tach Meter Pulses and Edges

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    • Figure 6.1 A Typical 2-pole DC Fan

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    • Figure 6.2 Output Signal of a 2-pole Fan

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    • Figure 6.3 Fan TACH Measurement With EMC2102

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  • 6.2 Characterizing a DC Fan with EVB-EMC2102 and ChipMan

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    • 6.2.1 General Setup

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    • 6.2.2 Set the Correct LIMIT2K Value

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    • 6.2.3 Determine the Number of Poles and the Maximum Fan Speed

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    • 6.2.4 Determine the Minimum Startup Speed

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    • 6.2.5 Determine the Stall Speed

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    • 6.2.6 Determine the Minimum Valid TACH Speed

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    • 6.2.7 Determine the Spin-up Levels (rpm60 and rpm75)

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    • 6.2.8 Using the Tested Parameters

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