EMC2301_11 Datasheet, PDF (39/43 Pages) SMSC Corporation – RPM-Based PWM Fan Controller

RPM-Based PWM Fan Controller
Datasheet
Chapter 6 Typical Operating Curves
The following Typical Operating Curves are included.
„ Supply Current vs. Temperature
„ Supply Current vs. Supply Voltage
„ Fan TACH Accuracy vs. Temperature
„ Fan TACH Accuracy vs. Supply Voltage
„ PWM output frequency vs. Supply Voltage
„ PWM output frequency vs. Temperature
„ FSC Operation
Supply Current vs. Ambient Temeperature
400
380
360
340
320
300
280
260
240
220
200
-50
0
50
100
150
Ambient Temperature (°C)
Tachometer Measurement Accuracy vs. Ambient Temperature
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
-50
0
50
100
150
AmbienTt Teemmppeeratuutrree(°(CC))
Supply Current vs. Supply Voltage
400
380
360
340
320
300
280
260
240
220
200
2.95 3.05 3.15 3.25 3.35 3.45 3.55 3.65
Supply Voltage (V)
Tachometer Measurement Accuracy vs. Supply Voltage
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
2.95 3.05 3.15 3.25 3.35 3.45 3.55 3.65
Supply Voltage (V)
SMSC EMC2301
39
DATASHEET
Revision 1.3 (05-18-11)