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EMC2300 Datasheet(PDF) 79 Page - SMSC Corporation

Part No. EMC2300
Description  Fan Control Device with High Frequency PWM and Temperature Monitors
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Maker  SMSC [SMSC Corporation]
Homepage  http://www.smsc.com
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EMC2300 Datasheet(HTML) 79 Page - SMSC Corporation

 
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Fan Control Device with High Frequency PWM and Temperature Monitors
Datasheet
SMSC EMC2300
79
Revision 0.2 (06-14-06)
DATASHEET
Appendix B Example Fan Circuits
The following figures show examples of circuitry on the board for the PWM outputs, tachometer inputs,
and remote diodes. Figure B.1, "Fan Drive Circuitry (Apply to PWM Driving Two Fans)" shows how the
part can be used to control four fans by connecting two fans to one PWM output.
Note: These examples represent the minimum required components. Some designs may require
additional components.
Figure B.1 Fan Drive Circuitry (Apply to PWM Driving Two Fans)
MMBT390
4
MMBT222
2
MMBT222
2
2.2k
1k
3.3V
3.3V
Fan
1
Fan
2
M
M
12
V
PWMx


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