ROHM BA6872AFM Datasheet

Motor driver ICs

3-phase motor driver and reversible
motor driver

BA6872AFM

The BA6872AFM has a 3-phase motor driver for VCR capstans, and a reversible motor driver for VCR loading. The cap­stan motor driver uses the three-phase, pseudo-linear drive method, and has a built-in torque ripple cancellation circuit,
and an output transistor saturation prevention circuit. The loading motor driver has two logic inputs which are used to
set the four operation modes (forward, reverse, stopped (idle) and brake.

Applications
VCR capstan motors, VCR loading motors

Features

1) 3-phase, pseudo-linear drive system.

2) Torque ripple cancellation circuit.

3) Output transistor saturation prevention circuit.

4) Hall element power supply.

5) Two control logic inputs set the four operation modes:
forward, reverse, stopped (idle), and brake.

6) Output voltage setting is possible using the Vref pin.

7) Thermal shutdown (TSD) circuit.

Absolute maximum ratings(Ta = 25C)

Recommended operating conditions (Ta = 25C)

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Motor driver ICs BA6872AFM

Block diagram

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Motor driver ICs BA6872AFM

Pin descriptions

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Motor driver ICs BA6872AFM

Input/output circuits
(1) Hall inputs (pins 1 to 6)

(2) Rotation direction setting input (pin 7) (5) Torque limit (pin 12)

(4) Torque control input (pins 10 and 11)

(3) Hall element power supply (pin 9)

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(6) Logic input (pins 15 and 16)