M63021FP Datasheet, PDF (14/17 Pages) Mitsubishi Electric Semiconductor – SPINDLE MOTOR AND 5CH ACTUATOR DRIVER

Preliminary
MITSUBISHI SEMICONDUCTORS
M63021FP
SPINDLE MOTOR AND 5CH ACTUATOR DRIVER
FG function at SPINDLE DRIVE
The FG terminal outputs the square pulse signal synchronizing with the Hall inputs [Hv+, Hv-] timing.
And, the FG terminal is open-collector output.
Phase delay circuit at SLIDE
Phase delay circuit is built in the IC to detect an output spike current, when the motor current direction
is switching.
In switching the motor current direction, Phase delay circuit switch-off all output trangister of H-bridge
for 3µsec.
Output current setting at SLIDE
In this IC, since output tranjister is NPN-type tranjister, motor coil current (Io) is larger than sensing
resistance current about 10mA (TYP.) according to base current of output tranjister.
Therefore please design output current with consisting these base current.
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REV990728