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M63010FP

SPINDLE MOTOR AND 4CH ACTUATOR DRIVER

MITSUBISHI ELECTRIC  

Preliminary

MITSUBISHI SEMICONDUCTORS

M63010FP

SPINDLE MOTOR AND 4CH ACTUATOR DRIVER

PWM carrier frequency setting

PWM carrier frequency is decided by charging and discharging the capacitor that is connected to OSC terminal

outer IC. Examination of the relationship the capacitor connected to OSC terminal and PWM carrier frequency

is given in following table.

Capacitor [pF]

330 220 180 130 110

Carrier Frequency [KHz] 65 90 110 140 160

*note) This PWM carrier frequency is TYP value.

The relationship between hall-amplifier-input and output-current-commutation at SPINDLE DRIVE

The relationship between the hall elements and the motor output current is shown in bellow Figure.

Hall

input

Hw+ Hv+ Hu+

V

U

W

V

+

Output

current 0

-

UW

V

U

W

Hall elements

UW

V

V

W

U

U

V

W

FORWARD

SPIN > REF

Outer roter

REVERSE

SPIN < REF

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 20mA (TYP.) according to base current of output tranjister.

Therefore please design output current with consisting these base current.

(13 / 16)

REV990118

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