EMC6D103-CK SMSC [SMSC Corporation], EMC6D103-CK Datasheet - Page 88

• Manufacturer Part Number: EMC6D103-CK
• Description: FAN CONTROL DEVICE WITH HIGH FREQUENCY PWM
• Manufacturer: SMSC [SMSC Corporation]

Revision 0.4 (04-04-05)
PWMx
Figure B.2 Fan Drive Circuitry (Apply to PWM Driving One Fan)
Figure B.3 Fan Tachometer Circuitry (Apply to Each Fan)
Note: For fans controlled directly by a PWM, it is suggested to implement
the optional diode (D1) to protect the tachometer input from large voltage
spikes generated by the fan.
from Fan
Output
3.3V
Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
Tach
470
DATASHEET
IN4148
D1
88
MMBT2222
3.3V
10k
TACH
Input
M
Fan
12V
SMSC EMC6D103
Datasheet