FAN8729 Fairchild Semiconductor, FAN8729 Datasheet - Page 16
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FAN8729
Manufacturer Part Number
FAN8729
Description
Motor / Motion / Ignition Controllers & Drivers BLDC+4CH BTL
Manufacturer
Fairchild Semiconductor
Type
Spindle Motor Controllerr
Datasheet
1.FAN8729.pdf
(24 pages)
Specifications of FAN8729
Operating Temperature Classification
Commercial
Package Type
PQFP
Operating Supply Voltage (min)
4.5V
Operating Supply Voltage (max)
13.2V
Operating Supply Voltage
4.5 V to 13.2 V
Supply Current
16.5 mA
Mounting Style
SMD/SMT
Package / Case
QFPH-48
Lead Free Status / RoHS Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
8 Reverse Rotation Preventing Function
• Reverse rotation prevention circuit has a function for intercepting the reverse rotation of MD.
• When SERVO control input is EC<ECR, MD rotates forward and Q which is the output of D-F/F goes "High".
• When SERVO control input is EC>ECR, motor puts on reverse brake and MD speed is rapidly reduced.
• When SERVO control input remains EC>ECR, MD rotates reverse and Q which is the output of D-F/F goes "Low", in
• Feature Table.
result current sense amp is interrupted. Accordingly gain controller goes OFF and motor is stopped.
Rotation
Reverse
Forward
H2+
H2-
H3+
H3-
E
E
C R
C
+
-
+
-
+
-
H2
H
L
H → L
H → L
D
CK
D-F/F
H3
R
Q
D-F/F
H
L
controller
Current
S ens e
DIR
Gain
Amp
H
L
Reverse Rotation Preventer
E
Forward
Driver
C
<E
–
CR
Brake and Stop
M
E
C
Stop
>E
CR
FAN8729
16