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BA6438S Datasheet

  • BA6438S

  • 3-phase motor driver

  • 8頁

  • ROHM

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BA6438S
Motor driver ICs
3-phase motor driver
BA6438S
The BA6438S 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 an output transistor saturation prevention circuit that provides
superb motor control over a wide range of current. The built-in motor power switching regulator allows applications with
low power consumption
!Applications
3-phase VCR capstan motors
!Features
1) 3-phase, full-wave, pseudo-linear drive system.
2) Torque ripple cancellation circuit.
3) Reversal brake based on the detection of motor
direction.
4) Output transistor (high-and low-sides) saturation
prevention circuit
5) Motor power switching regulator with oscillation circuit.
6) Output-to-GND short-circuit detection.
7) Available in SDIP 24-pin power package (with radiation
fins).
!Absolute
maximum ratings
(Ta = 25擄C)
Parameter
Applied voltage
Applied voltage
Power dissipation
Operating temperature
Storage temperature
Allowable output current
Symbol
V
CC
V
M
Pd
Topr
Tstg
I
Opeak
Limits
7
24
2000
鈭?/div>
1
鈭?0 鈭?+75
鈭?0 鈭?+150
1.7
鈭?/div>
2
Unit
V
V
mW
擄C
擄C
A
鈭?/div>
1
鈭?/div>
2
Reduced by 16mW for each increase in Ta of 1擄C over 25擄C.
Should not exceed the ASO value.
!Recommended
operating conditions
(Ta = 25擄C)
Parameter
Operating power supply voltage
Operating power supply voltage
Symbol
V
CC
V
M
Min.
4
3
Typ.
5
12
Max.
6
23
Unit
V
V

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