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EMC2300 Datasheet(PDF) 80 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) 80 Page - SMSC Corporation

 
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Fan Control Device with High Frequency PWM and Temperature Monitors
Datasheet
Revision 0.2 (06-14-06)
80
SMSC EMC2300
DATASHEET
Figure B.2 Fan Drive Circuitry (Apply to PWM Driving One Fan)
Figure B.3 Fan Tachometer Circuitry (Apply to Each Fan)
MMBT2222
470
3.3V
Fan
M
12V
PWMx
Note: For fans controlled directly by a PW M, it is suggested to implement
the optional diode (D1) to protect the tachometer input from large voltage
spikes generated by the fan.
10k
3.3V
Tach
Output
from Fan
TACH
Input
D1
IN4148


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