EMC6D100-DK SMSC [SMSC Corporation], EMC6D100-DK Datasheet - Page 12

• Manufacturer Part Number: EMC6D100-DK
• Description: ENVIRONMENTAL MONITORING AND CONTROL DEVICE WITH AUTOMATIC FAN CAPABILITY
• Manufacturer: SMSC [SMSC Corporation]

Chapter 3
SMSC EMC6D100/EMC6D101
PWM3
The following figures show the recommended circuitry on the board for the PWM outputs, tachometer
inputs, and remote diodes. FIGURE 3.1 shows how the part can be used to control additional fans by
connecting two fans to one PWM output.
FIGURE 3.1 - FAN DRIVE CIRCUITRY (APPLY TO PWM DRIVING TWO FANS)
FIGURE 3.2 - FAN DRIVE CIRCUITRY (APPLY TO PWM DRIVING ONE FAN)
PWMx
3.3V
Recommended Implementation
1k
2.2k
3.3V
470
3.3V
DATASHEET
0
MMBT3904
10
10
Page 12
MMBT2222
MMBT2222
MMBT2222
Empty
Fan
M
Empty
Empty
Environmental Monitoring and Control Device
M
Fan1
M
Fan2
12V
12V
Rev. 09-09-04
Datasheet