Diodes AH9279 - Manual (Page 9)

Data Sheet
TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER AH9279
Oct. 2011 Rev. 1. 3 BCD Semiconductor Manufacturing Limited
9
Typical Application
AH9279
VCC DO DOB GND
V
CC
=5V or 12V
C2
2.2 F
C1
2.2 F
R1
4.7
Coil 1 Coil 2
D1
R2
4.7
C3
2.2 F
Figure 14. Typical Application 1 of AH9279 (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. C1=C2=C3=2.2
µF typical, electrolytic capacitors are better. They should be fine tuned based on system
design.
3. R1=R2=4.7
Ω typical. They can be cancelled according to system requirement.