Diodes AH2984 - Manual (Page 2)

AH2984
Document number: DS31698 Rev. 4 - 2
2 of 10
www.diodes.com
December 2013
© Diodes Incorporated
AH2984
Typical Applications Circuit (Note 4)
(1) For SIP-4
Vdd
GND
12V
L1 L2
AH2984
1 2 3 4
D2
C D1
Vdd DO DOB GND
12V Brushless DC Fan
(2) For SOT89-5
AH2984
1 3 2
Vdd (12V)
L1
L2
D2
5 4
GND
C D1
NC DOB
Vdd DO GND
GND
12V Brushless DC Fan
Note: 4. D1 (Zener Diode) and Capacitor C are for power stabilization. Recommended value of C is 1μF/ 50V (E-Cap). Diode D2 is optional and helps
to protect the device and fan coils from reverse power conditions. The AH2984 also includes an internal reverse blocking diode at V
DD
pin.
Pin Descriptions
Pin Name SIP-4 SOT89-5 Description
V
DD
1 1 Input Power
DO 2 3 Output Pin
DOB 3 4 Output Pin
GND 4 2 Ground
NC — 5 No Connection