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
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).
prevention circuit
!Absolute maximum ratings (Ta = 25°C)
Parameter Symbol Limits Unit
VCC 7V
VM 24 V
Pd 2000
∗1
mW
Topr −10 ∼ +75
°C
Tstg −40 ∼ +150
IOpeak 1.7
∗2
A
∗
1 Reduced by 16mW for each increase in Ta of 1°C over 25°C.
Applied voltage
Applied voltage
Power dissipation
Operating temperature
Storage temperature
Allowable output current
∗
2 Should not exceed the ASO value.
°C
!Recommended operating conditions (Ta = 25°C)
Parameter Symbol Min. Typ. Max. Unit
VCC 456 V
VM 31223 V
Operating power supply voltage
Operating power supply voltage