AN2687 Freescale Semiconductor / Motorola, AN2687 Datasheet - Page 13

• Manufacturer Part Number: AN2687
• Description: BLDC Fan Control using the MC68HC908QT2
• Manufacturer: Freescale Semiconductor / Motorola

PART 4: FURTHER DEVELOPMENT
APPENDIX A: SCHEMATICS AND PCB LAYOUTS
MOTOROLA
The following lists some possible enhancements for the BLDC fan.
Figure 12
for the two BLDC fan demos.
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Freescale Semiconductor, Inc.
BLDC Fan Control using the MC68HC908QT2
For More Information On This Product,
Serial interface between fans in cooling fan arrays.
Use of 16-pin 908QY2 or 908QY4 to implement PWM speed control and
other features.
Use closed loop control for higher dynamic load applications (fans with
lower dynamic load characteristics do not need to use of closed loop
control due to the load is invariably small and constant).
Serial communication between fan and other systems (e.g. PC).
Use of serial interface to determine important information about the fan,
such as serial number, production lot number, manufacturer, etc.
Use of serial interface to control fan speed in any way including complex
speed control and monitor fan speed and other fan status information.
to
Figure 15
Go to: www.freescale.com
show the schematics and printed circuit board layouts
PART 4: FURTHER DEVELOPMENT
AN2687/D
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