SCH3112I-NE SMSC [SMSC Corporation], SCH3112I-NE Datasheet - Page 389

• Manufacturer Part Number: SCH3112I-NE
• Description: LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
• Manufacturer: SMSC [SMSC Corporation]

LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
Datasheet
Appendix B Example Fan Circuits
SMSC SCH311X
Figure B.1 Fan Drive Circuitry for Low Frequency Option (Apply to PWM Driving Two Fans)
PWMx
The following figures show examples of circuitry on the board for the PWM outputs, tachometer inputs,
and remote diodes.
fans to one PWM output.
Note: These examples represent the minimum required components. Some designs may require
additional components.
3.3V
1k
2.2k
Figure B.1
3.3V
shows how the part can be used to control four fans by connecting two
MMBT3904
DATASHEET
373
10
10
MMBT2222
MMBT2222
Empty
Empty
M
M
Fan1
Fan2
Rev 0.2 (09-28-04)
12V