TA8493AFG TOSHIBA Semiconductor CORPORATION, TA8493AFG Datasheet - Page 12
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TA8493AFG
Manufacturer Part Number
TA8493AFG
Description
3-phase Full Wave Brushless Dc Motor Driver Ic For Cd-rom Drives
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TA8493AFG.pdf
(27 pages)
- Current page: 12 of 27
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Reverse rotation detection circuit
inverted, at which time the torque is reduced to 0. The detection accuracy is determined by the number of pulses
per rotation of Hall element output.
Note4: Due to its inertial force, the motor does not stop immediately after the torque is reduced to 0.
By comparing the two phases of the Hall element signal, this circuit detects a state where the phases are
Direction of Rotation
Hall Element Signal
Hall Element Signal
Rotating Torque
(phase b)
(phase a)
V
V
ref
C
Forward torque
Forward rotation
12
Reverse torque
Reverse
rotation
(Note4)
Stopped
2006-3-6
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