Motor driver ICs
3-phase motor driver
BA6463FP-Y
The BA6463FP-Y is a motor driver developed for cylinders, which a constant power supply of 5V , and the start and stop
pins which opens output are incorporated.
Applications
VCR cylinder motors
Features
1) 3-phase, full-wave, pseudo-linear drive system.
2) Internal constant voltage power supply. (5V)
3) Internal thermal shutdown circuit.
Block diagram
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Motor driver ICs BA6463FP-Y
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
FElectrical characteristics (unless otherwise noted, Ta = 25_C, V
CC = 12V)
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Motor driver ICs BA6463FP-Y
Pin descriptions
613
Motor driver ICs BA6463FP-Y
Input/output circuits
614
Motor driver ICs BA6463FP-Y
Circuit operation
(1) Hall I/O
The 3-phase Hall signal is amplified in the hall amplifiers
and sent to the matrix circuit, where the signal is further
amplified and combined. After the signal is converted to
a current in the amplitude control circuit, the current is
supplied to the output driver, which then provides a motor
drive current. The phases of the Hall input signal, output
voltage, and output current are shown in Fig. 1.
(2) Torque control pin (EC pin)
The output current can be controlled by adjusting the
voltage applied to the torque control pin.
(3) Start/stop pin
The motor is in the run mode when the pin input voltage
is 3.5V or more and in the standby mode (all output transistors are off) when the voltage is 1.2V or less.
(4) Power ground pin (R
NF pin)
The RNF pin is the output stage ground pin. Connect a re-
sistor (0.5Ω recommended) between this pin and the
ground to monitor the output current.
(5) Phase compensation pin (C
Connect a capacitor between this pin and V
NF pin)
CC if the out-
put tends to oscillate.
Application example
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Motor driver ICs BA6463FP-Y
FOperation notes
(1) Start/stop pin
The I/O equivalent circuit of the start/stop pin is shown
in Fig. 4. The pin has a temperature dependence of
–7mV/C, and its resistance can vary ± 30%. The voltage
on this pin should be less than Vreg.
(2) Hall input
The I/O equivalent circuit of the Hall input pins is shown
in Fig. 5. The Hall devices can be connected in either series or parallel. The input Hall signal should be within the
range of the Hall input common-mode voltage.
(3) Torque limit pin
The output current can be limited by applying a voltage
to the torque limit pin. Control is provided so that this pin
will have the same potential as the power ground pin
(R
NF). Note that there is a voltage offset on this pin. The
NF-pin voltage is 0.325V when the TL-pin voltage is 0.4V
R
(typical) and the R
voltage offset changes with the R
NF-pin resistance is 0.5Ω. Note that the
NF-pin resistance. Con-
nect the TL Vreg (pin 23) when the TL pin is not used.
(4) Thermal shutdown circuit
The thermal shutdown circuit puts the driver outputs (A
2, and A3) to the open state at the temperature of 175_C
A
(typical). The circuit is deactivated when the temperature
drops to about 150_C.
1,
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Motor driver ICs BA6463FP-Y
Thermal derating curve
Electrical characteristic curves
External dimensions (Units: mm)
617
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