m63021fp Mitsumi Electronics, Corp., m63021fp Datasheet - Page 12

• Manufacturer Part Number: m63021fp
• Description: Spindle Motor Actuator Driver
• Manufacturer: Mitsumi Electronics, Corp.

Preliminary
Control value
Direct PWM operation
Io=Vrs / Rs
The spindle and the slide channel is controlled by the direct PWM control.
Also,built-in the current limit circuit. This IC controls the motor current directly.
FORWARD Current path timing 1.
SL+
Current path 1
Current
M
path 1
Motor current
SL-
Rs
Current
carrier period
path 2
VM2
SPINDLE MOTOR AND 5CH ACTUATOR DRIVER
RSL
GND
(
12
/
17)
Control value
FORWARD Current path timing 2.
SL+
MITSUBISHI SEMICONDUCTORS
Current path 2
M
M63021FP
Time
SL-
REV990728
Rs
VM2
RSL
GND