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Motor driver ICs

FDD spindle motor driver

BA6477FS

The BA6477FS is a one-chip IC designed for driving FDD spindle motors. This high-performance IC employs a 3-phase,

full-wave soft switching drive system, and contains a digital servo, an index amplifier, and a power save circuit. The com-

pactly packaged IC reduces the number of external components required.

FApplications

Floppy disk drivers

FFeatures

1) 3-phase, full-wave soft switching drive system.

2) Digital servo circuit.

3) Power save circuit.

4) Hall power supply switch.

5) Motor speed changeable.

6) Index amplifier.

FAbsolute maximum ratings (Ta = 25_C)

FRecommended operating conditions (Ta = 25_C)