Data Sheet

Two Phase Dual-coil High Voltage Smart Fan Motor Driver

AH9280

Oct. 2011 Rev. 1. 2

BCD Semiconductor Manufacturing Limited

9

Typical Application

AH9280

VCC DO DOB GND

C3

2.2 F

C2

2.2 F

R2

4.7

Coil 1 Coil 2

D1

R3

4.7

C1

2.2 F

R1

47

Figure 14 Typical Application 1 of AH9280 (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=47

Ω typical.

3. C1=C2=C3=2.2

µF typical, electrolytic capacitors are better. They should be fine tuned based on system

design.

4. R2=R3=4.7

Ω typical. They can be removed according to system requirement.