ROHM BA6858AFM, BA6859AFS, BA6859AFP-Y, BA6859AFP, BA6859AFM Datasheet

Motor driver ICs

Three-phase motor driver for
CD-ROMs

BA6858AFP / BA6858AFM / BA6859AFP /
BA6859AFP-Y / BA6859AFM / BA6859AFS

The BA6858A and BA6859A series are ICs developed for CD-ROM spindle motor drives. In addition to the functions
of the BA6849 series, (short brake, reverse-rotation prevention circuit, rotation direction dector, and FG output), the
BA6858A and BA6859A series have a built-in brake mode switching pin. With torque command input, these series are
compatible with the DSP3.3V. In addition, the BA6858A series has an FG composite output.

Applications
CD-ROM, CD-R, CD-RW, DVD-ROM, and DVD-RAM

Features

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

2) Built-in power save and thermal shutdown functions.

3) Built-in current limiter and Hall bias circuits.

4) Built-in FG output.

5) Built-in rotation direction detector.

6) Built-in reverse rotation prevention circuit.

7) Built-in short brake pin.

8) Built-in brake mode switching pin.

9) DSP3.3V compatible.

Absolute maximum ratings (Ta = 25C)

848

Mot

or driver ICs

Recommended operating conditions (Ta = 25C)

Block diagram

BA6858AFP / BA6858AFM

BA6858AFP / BA6858AFM / BA6859AFP /

BA6859AFP-Y / BA6859AFM / BA6859AFS

849

Mot

or driver ICs

Pin descriptions
BA6858AFP/BA6858AFM

BA6858AFP / BA6858AFM / BA6859AFP /

BA6859AFP-Y / BA6859AFM / BA6859AFS

850

BA6858AFP / BA6858AFM / BA6859AFP /

Mot

or driver ICs

BA6859AFP/BA6859AFM BA6859AFP-Y

BA6859AFP-Y / BA6859AFM / BA6859AFS

851

Mot

or driver ICs

BA6859AFS

BA6858AFP / BA6858AFM / BA6859AFP /

BA6859AFP-Y / BA6859AFM / BA6859AFS

852