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

Direct PWM operation

The spindle and the slide channel is controlled by the direct PWM control.

Analog input voltage control the driving current which is in proportion to input voltage.

This control is direct PWM control type of motor current chopper.

Also,built-in the current limit circuit. This IC controls the motor current directly.

direct PWM operation as follows;

1) The current which flows on a motor is detected, and current is supplied

from a power supply until it reaches the predetermined instruction value

to which the current is proportional to input voltage.

2) When current reaches an instruction value, an output transistor is changed and

the period coil inertia energy to a career cycle is made to regeneration using an internal path.

3) After repeat 1) and 2).

Therefore, the IC constantly surveillance and control the current value itself use sensor resistor.

Moreover, these ICs built-in current limit circuit so that protect to large current.

Thus, if input excessive control voltage, the current don't flow that settle limit current.

FORWARD Current path timing 1.

VM1

VM2

FORWARD Current path timing 2.

VM1 VM2

Current comp

Current path 1

Rs

RSL

Current comp

Rs

RSL

SL+

M

SL-

SL+

M

SL-

Current

path 1

GND

Current path 2

GND

Current

path 2

Control value

Control value

Io=Vrs / Rs

Motor current

carrier period

( 12 / 17)

Time

REV010307

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