634
Motor driver ICs
3-phase motor driver
BA6444FP
The BA6444FP is a 3-phase, full-wave, pseudo-linear motor driver suited for VCR capstan motors. The IC has a torque
ripple cancellation circuit to reduce wow and flutter, and a forced brake circuit that allows abrupt change of operational
mode. The output transistor saturation prevention circuit provides superb torque control over a wide range of current.
FG and hysteresis amplifiers are also built in.
F
Applications
VCR capstan motors, DAT capstan motors
F
Features
1) 3-phase, full-wave, pseudo-linear drive system.
2) Torque ripple cancellation circuit.
3) Forced brake circuit.
4) Output transistor (high- and low-sides) saturation
prevention circuit.
5) FG and hysteresis amplifiers.
6) Thermal shutdown circuit.
F
Absolute maximum ratings (Ta = 25
_
C)
F
Recommended operating conditions
637
Motor driver ICs
BA6444FP
F
Input / output circuits
(1)
I / O circuit interface
Resistances, in
, are typical values. Note that the resistance values can vary
"
30%.
1) ED / S pin (2 pin)
2) BRK pin (3 pin)
3) Motor output (A1: 5 pin, A2: 6 pin,
A3: 9 pin)
4) E
C
and E
CR
pins (10 pin, 11 pin)
5) TL pin (12 pin)
6) Hall signal input pins
(H1
)
: 27 pin, H1
*
: 26 pin, H2
)
: 25 pin,
H2
*
: 24 pin, H3
)
: 23 pin, H3
)
: 22 pin)
638
Motor driver ICs
BA6444FP
8) Amplifier I / O pins (20 pin, 19 pin, 18 pin)
7) Schmitt trigger amplifier I / O pins (17 pin, 16 pin)
PDF 
ZIP
