M56733AFP
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 pact 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
- IO (peak) = 1.0 A
- Low-capacitance damping capacitor
Applications
- FDD spindle motors (5 inches)
Remended Operating Conditions
- Power-supply voltage: 10.8 (min.) to 13.2 (max.), 12.0 (typ.)
- Oscillation frequency: 492 k Hz
- Maximum output current: 800 m A
- FG amplifier input signal level: 5 m Vp-p or more
Rev.1.00, Sep.22.2003, page 1 of 6
Block Diagram
RF 31
VCC...
