FAN8729 Fairchild Semiconductor, FAN8729 Datasheet - Page 16

• Manufacturer Part Number: FAN8729
• Description: Motor / Motion / Ignition Controllers & Drivers BLDC+4CH BTL
• Manufacturer: Fairchild Semiconductor
• Type: Spindle Motor Controllerr

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

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
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