FAN8725 Datasheet, PDF (6/20 Pages) Fairchild Semiconductor – Spindle Motor and 5-Channel Motor Driver

FAN8725 (KA3025)
Equivalent Circuits (Spindle Part)
HALL INPUT
22.5Ω
Pin
1,3,5
1KΩ
1KΩ
22.5Ω
Pin
2,4,6
DRIVER OUTPUT
Pin 10
Pin 11
15KΩ
Pin 13,14,15
TORQUE CONTROL INPUT
Pin 45
Pin 46
22.5Ω
22.5Ω
1KΩ
+
1KΩ
-
POWER SAVE INPUT
HALL BIAS INPUT
5Ω
Pin 48
100KΩ
SHORT BRAKE INPUT
Pin 44
22.5Ω 40KΩ
30KΩ
FG OUTPUT
Vcc
10KΩ
22.5Ω
Pin 7
Pin 43
22.5Ω 1KΩ
20KΩ
DIR OUTPUT
Vcc
30KΩ
22.5Ω
Pin 8
6