M63022FP 데이터 시트보기 (PDF) - MITSUBISHI ELECTRIC

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M63022FP

SPINDLE MOTOR AND 5CH ACTUATOR DRIVER

MITSUBISHI ELECTRIC  

MITSUBISHI SEMICONDUCTOR (LSI)

M63022FP

SPINDLE MOTOR AND 5CH ACTUATOR DRIVER

q 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.

q FG function duty 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.

Capacitor [pF] 820 750 330 220 180 130 110

Carrier Frequency [kHz] 28 30 65 90 110 140 160

Note : This PWM carrier frequency is TYP value.

q 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-

q Recommendation of short brake mode at spindle drive off all output trangister of H-bridge for 3µsec.

This IC has two brake mode, PWM-BRAKE-MODE and SHORT-

BRAKE-MODE. In this IC recommendation, SHORT-BRAKE-

MODE is superior to PWM-BRAKE-MODE to reducing the power

dissipation and to avoid braking down of this IC.

(By excessive reverse torque current in braking a motor with

PWM-BRAKE from high-speed-rotation with being excessive Back-

EMF, this IC could be broken.)

q 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.

q The relationship between hall-amplifier-input and

output-current-commutation/FG output 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

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