M63013FP Datasheet, PDF (10/17 Pages) Mitsubishi Electric Semiconductor – SPINDLE MOTOR AND 4CH ACTUATOR DRIVER

Preliminary
MITSUBISHI SEMICONDUCTORS
M63013FP
SPINDLE MOTOR AND 4CH ACTUATOR DRIVER
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) to 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
Gio
Dead zone
current limit
Dead zone
CTL -REF (V)
Gio
SLIN
R1
R2
CTL
OPIN-
SLIN
C1
R2
CTL
R1
OPIN-
SLIN
OPIN-
-
2K
+
10K
REF
current limit
Reverse
VM23
Rs
RSL
SL+
SL-
GND
Forward
M
Reverse
The example of current-gain and current-limit of SLIDE.
Rs [Ω]
Ilim [A]
Gio* [A/V]
R1=R2
2•R1=R2
0.50
1.00
0.75
0.66
1.00
0.50
2.00
1.00
1.33
0.66
1.00
0.50
Gio*= R1 / R2•Rs [A/V]
(10 / 17)
REV990607