M63021FP 查看數據表（PDF） - MITSUBISHI ELECTRIC

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M63021FP

SPINDLE MOTOR AND 5CH ACTUATOR DRIVER

MITSUBISHI ELECTRIC  

Preliminary

MITSUBISHI SEMICONDUCTORS

M63021FP

SPINDLE MOTOR AND 5CH ACTUATOR DRIVER

Standby function

Logic control

MU1 Loading

SELECT2

H

On

SELECT1 L/Open Off

Slide1

On

Off

Drive

Slide2

On

Off

channel

Focus Tracking Spindle

On

On

On

Off

Off

Off

This IC has MUTE terminal (MU1).

It is possible to control ON / OFF of the channel by external logic inputs.

In case of SELECT1, the bias of all circuit becomes OFF.

Therefore, this mode is available in order to reduce the power dissipation when the waiting mode.

In case of SELECT2,the bias of all channel becomes ON.

Brake select function

BRS

Hi

L / Open

SPIN < REF

Reverse Brake

Short Brake

REF < SPIN

Forward

Forward

This IC has BRS terminal (BRS).

It is possible for a braking timiming of Spindle drive to select which the short brake or the reverse brake by BRS.

It shuould select the short brake in case of high speed system and please change to the reverse brake when the rotation

speed becomes enough low. It is available when the SPIN voltage is low than the reference voltage.

Loading channel

The loading channel is the circuit of BTL voltage drive. This circuit has the referential input. Output swing is determined with

∆Vin x 8. Also,it is possible for this channel to use for the slide motor , the focus coil and the tracking coil.

The input terminal is high impedance. It is possible to do variable a gain by external resistor.

In case of one MCU port, if use three state port, it is possible for this channel to have the stop function.

VM3

LOIN+

REF

LOADING

Channel

LO+

+

Vo

-

LO-

Forward

M

Reverse

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REV990728

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