Data sheet, Typical application (continued) – Diodes AH9281_82 User Manual

Page 13

Advertising
background image


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

13

Typical Application (Continued)

5

2

3

1

4

VCC

GND FG/RD

DO

DOB

V

CC

=5V or 12V

R

PU

4.7k

AH9281/2

GND

Coil 1

Coil 2

C1

2.2 F

FG/RD

D1

R1

47

ZD1 35V

ZD2 35V

Figure 18. Typical Application 4 of AH9281/82 (SOT-89-5, Note 5)



Note 5:
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.
5. R

PU

=4.7k

Ω typical.

.


Advertising