Data Sheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82
Typical Application
VCC=5V or 12V
D1
AH9281/2
VCC
DOB GND
FG/RDDO
R1
47
Coil 1 Coil 2
RPU
4.7K
FG/RD
R3
4.7
R2
4.7
C1
2.2 F
C3
C2
2.2 F
2.2 F
Figure 15. Typical Application 1 of AH9281/82 (TO-95, Note 2)
Note 2:
1. D1 is an ordinary diode used to filter the noise from VCC and protect IC if VCC and GND are plugged
reversed.
2. R1=47Ω typical.
3. C1=C2=C3=2.2µF typical, electrolytic capacitors are better. They should be fine tuned based on system
design.
4. R2=R3=4.7Ω typical. They can be cancelled according to system requirement.
5. RPU=4.7kΩ typical.
Oct. 2011 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
10