ROHM BA6444FP Datasheet

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.

Applications
VCR capstan motors, DAT capstan motors

Features

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

2) Torque ripple cancellation circuit.

3) Forced brake circuit.

Absolute maximum ratings (Ta = 25C)

4) Output transistor (high- and low-sides) saturation
prevention circuit.

5) FG and hysteresis amplifiers.

6) Thermal shutdown circuit.

Recommended operating conditions

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Motor driver ICs BA6444FP

Block diagram

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Motor driver ICs BA6444FP

Pin descriptions

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Motor driver ICs BA6444FP

Input/output circuits
(1) I/O circuit interface
Resistances, in Ω, 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,

4) E

C and ECR pins (10 pin, 11 pin)

A3: 9 pin)

5) TL pin (12 pin) 6) Hall signal input pins



: 27 pin, H1: 26 pin, H2: 25 pin,

(H1



: 24 pin, H3: 23 pin, H3: 22 pin)

H2

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