Diodes AH9281_82 Manuel d'utilisateur télécharger pdf (Page 10)

Data Sheet

Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82

Oct. 2011 Rev. 1. 4 BCD Semiconductor Manufacturing Limited

Typical Application

AH9281/2

VCC

DOB GND

=5V or 12V

FG/RD

2.2

4.7K

FG/RD

2.2

Coil 1 Coil 2

4.7

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. R

=4.7kΩ typical.

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Diodes AH9281_82 Manuel d'utilisateur Page 10