M63015FP データシートの表示（PDF） - MITSUBISHI ELECTRIC

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M63015FP

SPINDLE MOTOR AND 4CH ACTUATOR DRIVER

MITSUBISHI ELECTRIC  

MITSUBISHI SEMICONDUCTOR (LSI)

M63015FP

SPINDLE MOTOR AND 4CH ACTUATOR DRIVER

q Slide channel

The relationship between the differential voltage between SLIN and

REF and the torque is shown in right Figure. The voltage gain[Gvo]

is 1.0 [V/V]. The current gain is 2.0A/V (at sensing resistor : 0.5

ohm and R1=R2) in forward torque directions, and the dead zone

is from 0mV to 60mV (at R1=R2=16kohm).

The coil current gain under the reverse torque is the same with in

forward torque directions.And the limitation function gets on when

the differential voltage of VM23(12V)~RSL is 0.5V.

Therefore current-gain-control and current-limit of this IC is

determined with sensing resister value.In the input part,built-in an

inverted amplifier. It is possible to control more detail by setting

external circuit.

Forward

Current limit

Gio

Dead zone

Dead zone

CTL -REF (V)

Gio

SLIN

CTL

CTL

R1

R2

OPIN-

SLIN

C1

R1

R2

OPIN-

Current limit

Reverse

Reverse Torque

SLIN

OPIN-

-

2K

+

10K

REF

VM23

Rs

RSL

SL+

SL-

GND

Forward

M

Reverse

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

Rs [Ω]

0.50

0.75

1.00

Ilim [A]

1.00

0.66

0.50

Gio* [A/V]

R1=R2

2•R1=R2

2.00

1.00

1.33

0.66

1.00

0.50

Gio*= R1 / [(R1+R2)•Rs] [A/V]

The input resisters, the 10kΩ resister to the non-inverted input and,

the 2kΩ resister to the inverted input, are built-in the operational amplifier.

Therefore the composition value of the external input resisters(R1 R2)

should be set 8kΩ because of the compensation for the input offset voltage.

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