M63016FP Просмотр технического описания (PDF) - MITSUBISHI ELECTRIC

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M63016FP

Spindle Motor AND 4CH ACTUATOR Drive IC

MITSUBISHI ELECTRIC  

MITSUBISHI SEMICONDUCTORS

M63016FP

Spindle Motor AND 4CH ACTUATOR Drive IC

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. 5ohm.

FOIN

2.5R

REF

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+

MITSUBISHI ELECTRIC CORPORATION

11 20

RFO

Rs

FO-

REV.011126

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