m63024 Mitsumi Electronics, Corp., m63024 Datasheet - Page 12

• Manufacturer Part Number: m63024
• Description: Spindle Motor And 5ch Actuator Driver
• Manufacturer: Mitsumi Electronics, Corp.

Control value
Io=Vrs / Rs
Direct PWM operation
The spindle and the slide channel is controlled by the direct PWM control.
Analog input voltage control the driving current which is in proportion to input voltage.
This control is direct PWM control type of motor current chopper.
Also,built-in the current limit circuit. This IC controls the motor current directly.
direct PWM operation as follows;
Therefore, the IC constantly surveillance and control the current value itself use sensor resistor.
Moreover, these ICs built-in current limit circuit so that protect to large current.
Thus, if input excessive control voltage, the current don't flow that settle limit current.
1) The current which flows on a motor is detected, and current is supplied
2) When current reaches an instruction value, an output transistor is changed and
3) After repeat 1) and 2).
FORWARD Current path timing 1.
from a power supply until it reaches the predetermined instruction value
to which the current is proportional to input voltage.
the period coil inertia energy to a career cycle is made to regeneration using an internal path.
SL+
Current comp
Current path 1
Current
M
path 1
Motor current
SL-
VM1
Rs
Current
carrier period
path 2
VM2
RSL
GND
(
12
SPINDLE MOTOR AND 5CH ACTUATOR driveR
/
Control value
17)
FORWARD Current path timing 2.
SL+
M63023/024/026/027FP
Current comp
MITSUBISHI SEMICONDUCTORS
Current path 2
M
Time
SL-
VM1
REV010307
Rs
VM2
RSL
GND