M63013 データシートの表示（PDF） - Mitsumi

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M63013

SPINDLE MOTOR AND 4CH ACTUATOR DRIVER

Mitsumi 

Preliminary

MITSUBISHI SEMICONDUCTORS

M63013FP

SPINDLE MOTOR AND 4CH ACTUATOR DRIVER

FOCUS / TRACKING channel

The focus and tracking channel is the current feedback control

drive of MITSUBISHI original.The focus and tracking is the same

composition.

The relationship between the differential voltage between FOIN

and REF and the output current is shown in right Figure.

The voltage gain is 0.4 [V/V].Therefore, the current gain is

0.8[A/V] in case of the sensing resistor is 0.5 ohm.

The maximum range of output swing is limited around 7.5 volts,in

case of VM4 is above 10 volts.

FOIN

REF

2.5R

2.5R

VM4

R

R

R

FO-

R

Rs

R

RFO

Coil

R

FO+

+

Coil

current [A]

IL=Vrs / Rs IL

0

FOIN– REF (V)

FO-

Rs

RFO

VM4

2

Coil

Gio=1.0A/V

at Rs=0.33 ohm

-

Output

voltage [V]

Vrs Vrs=(RFO–[FO-])

=0.4 x (FOIN–REF)

FO+

+

Coil

-

Vcoil

FOIN– REF (V)

FO+

(11 / 17)

RFO

Rs

FO-

REV990607

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