User ManualTable of Contents1 Overview62 Audience63 References64 The Evaluation System6Figure 4.1 EMC2102 Fan Control Evaluation System7Figure 4.2 EVB-EMC2102 Board75 Basic Operation Experiments85.1 Experiment 1 - Manual Fan Control85.1.1 ChipMan Installation85.1.2 Setting Up the ChipMan8Figure 5.1 ChipMan Message for First Operation8Figure 5.2 ChipMan Device Selection Window9Figure 5.3 Selecting the Device and Master Controller Type10Figure 5.4 ChipMan Operation Window10Figure 5.5 Changing Fan Speed125.1.3 Plotting From ChipMan12Figure 5.6 Plotting from the ChipMan12Figure 5.7 Plot Windows13Figure 5.8 Plot Examples135.2 Experiment 2 - RPM Based Closed-Loop Fan Control135.2.1 Getting Started135.2.2 Basic RPM Based Fan Control14Figure 5.9 Plots for Proper Control Settings145.2.3 Effects of Loading14Figure 5.10 Effects of Loading155.2.4 Register Change Summary15Table 5.1 Register Change Summary for Experiment 2155.3 Experiment 3 - Spin-up Configuration Options165.3.1 Fan Control Parameters16Figure 5.11 Fan Control Parameters165.3.2 Getting Started175.3.3 Forced Kick Function17Figure 5.12 Forced Kick Function175.3.4 Spin-Up Level17Figure 5.13 60% Spin Level Setting185.3.5 Spin-Up Time18Figure 5.14 Reduced Spin-up Time185.3.6 Register Change Summary19Table 5.2 Register Change Summary for Experiment 3195.4 Experiment 4 - RPM Drive Mode Rate Controls205.4.1 General Setup205.4.2 Controlling the Ramp Rate20Figure 5.15 Default Ramp Rate20Figure 5.16 Default Step Size with Different UPDATE Settings21Figure 5.17 Default UPDATE with Different Step Size Settings21Figure 5.18 Exceptionally Slow Rate225.4.3 Register Change Summary22Table 5.3 Register Change Summary for Experiment 4225.5 Experiment 5 - Optimizing RPM Control Response235.5.1 General Setup235.5.2 Fan Configuration Register (52h)23Figure 5.19 Update Time Modifications235.5.3 FAN Minimum Drive Register (55h) and Valid TACH Count (56h)24Figure 5.20 Minimum Drive Setting24Figure 5.21 Valid Tach Count Setting245.5.4 Register Change Summary25Table 5.4 Register Change Summary for Experiment 7255.6 Experiment 6 - Limits and Alerts265.6.1 General Setup265.6.2 Fan Spin and Stall Interrupts26Figure 5.22 Fan Spin and Stall275.6.3 Register Change Summary275.7 Experiment 7 - Troubleshooting285.7.1 Repetitious Spin-up Routine Caused by Incorrect Settings28Figure 5.23 Fan Spin-up Routine Restarted Repeatedly28Figure 5.24 Theoretical Plot of Case 129Figure 5.25 Spin-up Case 1 Fix 129Figure 5.26 Spin-up Case 1 Fix 230Figure 5.27 Theoretical Plot of Case 230Figure 5.28 Spin-up Case 231Figure 5.29 Theoretical Plot of Case 331Figure 5.30 Spin-up Case 332Figure 5.31 Spin-up Routine Restarted During Normal Operation32Figure 5.32 Theoretical Plot of Case 433Figure 5.33 Spin-up Case 433Figure 5.34 Spin-up Case 534Figure 5.35 Spin-up Case 5 Fix346 Appendix356.1 DC Fan Basics - Poles, Tach Meter Pulses and Edges35Figure 6.1 A Typical 2-pole DC Fan35Figure 6.2 Output Signal of a 2-pole Fan35Figure 6.3 Fan TACH Measurement With EMC2102366.2 Characterizing a DC Fan with EVB-EMC2102 and ChipMan366.2.1 General Setup366.2.2 Set the Correct LIMIT2K Value376.2.3 Determine the Number of Poles and the Maximum Fan Speed376.2.4 Determine the Minimum Startup Speed376.2.5 Determine the Stall Speed376.2.6 Determine the Minimum Valid TACH Speed376.2.7 Determine the Spin-up Levels (rpm60 and rpm75)386.2.8 Using the Tested Parameters38Size: 4.3 MBPages: 38Language: EnglishOpen manual