Diodes AH9280 - Manual (Page 10)

Data Sheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280
Oct. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
10
Typical Application (Continued)
AH9280
VCC DO DOB GND
V
CC
=5V or 12V
Coil 1 Coil 2
D1
C1
2.2 F
R1
47
ZD1
35V
ZD2
35 V
Figure 15. Typical Application 2 of AH9280 (Note 3)
Note 3:
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=47 Ω typical.
3. C1 =2.2 µF typical, electrolytic capacitors are better. They should be fine tuned based on system design.
4. ZD1 and ZD2 breakdown voltage are 35V.