M56733AFP Datasheet, PDF (1/7 Pages) Mitsubishi Electric Semiconductor – 3-PHASE BRUSHLESS MOTOR CONTROL

M56733AFP
3-Phase Brushless Motor Driver
REJ03F0081-0100Z
Rev.1.0
Sep.22.2003
Description
The M56733AFP is a semiconductor integrated circuit designed as a single-chip controller for FDD spindle motors. It
incorporates a power amplifier, Hall amplifier, FG amplifier, oscillator, and speed discriminator, along with various
protective circuits. Control of switching between three speeds by the single MOD pin gives this IC the edge for use in
compact systems.
Features
• Digital servo provides high precision, good stability, and freedom from the need for adjustment.
• A single pin controls switching between three speed. ••• MOD
• Two enable signals. ••• EN, EN
• I_{O (peak)} = 1.0 A
• Low-capacitance damping capacitor
Applications
• FDD spindle motors (5 inches)
Recommended Operating Conditions
• Power-supply voltage: 10.8 (min.) to 13.2 (max.), 12.0 (typ.)
• Oscillation frequency: 492 kHz
• Maximum output current: 800 mA
• FG amplifier input signal level: 5 mVp-p or more
Rev.1.00, Sep.22.2003, page 1 of 6