ROHM BA6853FS, BA6848FP Datasheet

Motor driver ICs

3-phase motor driver for
CD-ROMs

BA6848FP / BA6853FS

The BA6848FP and BA6853FS are single-chip ICs developed for CD-ROM spindle motor drives. These ICs are 3­phase, full-wave, pseudo-linear drives with FG output, FG composite output, and reverse-rotation pins built-in for high
functionality and high performance.

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

Features

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

2) Built-in PS pin for power save mode when ON.

3) Built-in thermal shutdown and current limiter circuits.

Absolute maximum ratings (Ta = 25C)

4) Built-in Hall bias circuit (for the BA6848FP).

5) Built-in FG output and FG composite output.

6) Built-in reverse-rotation pin.

Recommended operating conditions (Ta = 25C)

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Motor driver ICs BA6848FP / BA6853FS

Block diagram

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Motor driver ICs BA6848FP / BA6853FS

Pin descriptions
BA6848FP BA6853FS

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Motor driver ICs BA6848FP / BA6853FS

I / O circuit diagrams
(1) Power save(PS)

(4) Coil output (A1, A2, A3)

(2) Reverse (REV)

(3) Torque command input (6) Hall bias

(5) Hall input



(H1

, H1, H2, H2, H3, and H3)

784

Note: Resistances are typical values.