M63023 데이터 시트보기 (PDF) - Mitsumi

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M63023

SPINDLE MOTOR AND 5CH ACTUATOR driveR

Mitsumi 

MITSUBISHI SEMICONDUCTORS

M63023/024/026/027FP

SPINDLE MOTOR AND 5CH ACTUATOR driveR

PWM carrier frequency setting

PWM carrier f requency 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 f requency

is giVen in f ollowing table.

Capacitor [pF]

820 750 330 220 180 130

Carrier Frequency [KHz] 28

30

65

90 110 140

*note) This PWM carrier frequency is TYP value.

110

160

Recommendation of SHORT BRAKE MODE at SPINDLE drive

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 av oid braking down of

this IC.

(By excessiVe rev erse torque current in braking a motor with PWM-BRAKE f rom high-speed-rotation with being

excessiVe Back-EMF, this IC could be broken.)

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/FG output is shown in bellow Figure.

Hall

input

Hw+ HV+ Hu+

V

U

W

V

+

Output 0

current -

UW

V

U

W

FG

Output

Hall elements

UW

V

V

W

U

U

V

W

M63023/026FP

FORW ARD

SPIN > REF

M63024/027FP

Outer roter

Rev erse

SPIN < REF

( 13 / 17)

REV010307

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