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

SPINDLE channel

The relationship between the dif f erential Voltage between SPIN and REF

and the torque is shown in right Figure. The Voltage gain[GVo] is 1.0 [V/V].

The current gain[Gio] is 2.0[A/V] (at sensing resistor : 0.5 ohm,and

R1= ,R2=0ohm) in f orward torque directions, and the dead zone is f rom

0mV to 80mV (at R1= ,R2=0ohm) .

The coil current gain under the rev erse torque is the same with in f orward

torque directions.And the limitation f unction gets on when the dif f erential

Voltage of VM1(12V) RSP is 0.5V.

Theref ore current-gain-control and current-limit of this IC is determined with

sensing resister v alue, and more detail control can be determined with

setting a gain-resister outer this IC as below.

current limit

lim1F

Dead zone

Gio

Rev erse Torque

Forward Torque

Gio

CTL -REF (V)

Dead zone

lim1R

current limit

The example of current-gain and current-limit of SPINDLE.

Rs Ilim1F Ilim1R

[ohm] [A] [A]

R1=

R2=0 ohm

Gio* [A/V]

R1=R2 R2=2XR1

0.50

0.75

1.00 0.56

0.66 0.37

2.00

1.33

1.00

0.66

0.66

0.44

1.00 0.50 0.28

1.00

0.50

0.33

Gio*= R1 / [(R1+R2)XRs] [A/V]

VM1

5V

Rh

Rs

CTL

1.65V

R2

R1

RSP

HB

HU+

SPIN

HU-

HV+

HV-

HW+

REF

HW-

U

V

W

GND

( 9 / 17)

M

REV010307

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