BA6438S Datasheet, PDF (1/8 Pages) Rohm – 3-phase motor driver

Motor driver ICs
3-phase motor driver
BA6438S
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°C)
Parameter
Symbol
Limits
Unit
Applied voltage
VCC
7
V
Applied voltage
VM
Power dissipation
Pd
24
V
2000^∗1
mW
Operating temperature
Topr
−10 ∼ +75
°C
Storage temperature
Tstg
−40 ∼ +150
°C
Allowable output current
IOpeak
1.7^∗2
A
∗1 Reduced by 16mW for each increase in Ta of 1°C over 25°C.
∗2 Should not exceed the ASO value.
!Recommended operating conditions (Ta = 25°C)
Parameter
Operating power supply voltage
Operating power supply voltage
Symbol Min. Typ. Max.
Unit
VCC
4
5
6
V
VM
3
12
23
V