AN2687 Freescale Semiconductor / Motorola, AN2687 Datasheet - Page 7
AN2687
Manufacturer Part Number
AN2687
Description
BLDC Fan Control using the MC68HC908QT2
Manufacturer
Freescale Semiconductor / Motorola
Datasheet
1.AN2687.pdf
(48 pages)
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MOTOROLA
Freescale Semiconductor, Inc.
IRQ
BLDC Fan Control using the MC68HC908QT2
For More Information On This Product,
Figure 7. Actual Temperature and Speed Result in the Demos
off-time
L1 synchronized with falling edge of Hall signal
ICAP
Figure 6. Commutation and Speed Control Signals
off-time
Go to: www.freescale.com
L2 synchronized with rising edge of Hall signal
IRQ
on-time
ICAP
on-time
PART 2: HARDWARE DESIGN
Hall Signal
L1 (Q1, pin3)
Full Speed
L2 (Q2, pin3)
Full Speed
L1 (Q1, pin3)
Speed depends
on off-time
L2 (Q2, pin3)
Speed depends
on off-time
AN2687/D
7
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