M63028FP Renesas Electronics Corporation., M63028FP Datasheet - Page 16

• Manufacturer Part Number: M63028FP
• Description: Spindle Motor And 5ch Actuator Driver
• Manufacturer: Renesas Electronics Corporation.

M63028/029FP
Direct PWM operation
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.
PWM carrier frequency setting
PWM carrier frequency is decided by charging and discharging the capacitor that is connected to OSC terminal outer
IC.Examination of the relationship the capacitor connected to OSC terminal and PWM carrier frequency is given in
following table.
Capacitor [pF]
Carrier Frequency [kHz]
*note) This PWM carrier frequency is TYP value.
Rev.1.0, Sep.16.2003, page 16 of 21
Control value
Io=Vrs/ Rs
FORWARD Current path timing 1.
SL+
Current comp
Current path 1
Current
path1
M
Motor current
VM1
SL-
Current
path2
Rs
carrier period
820
28
GND
VM2
RSL
750
30
Control value
FORWARD Current path timing 2.
330
65
SL+
Current comp
220
90
Current path 2
Time
M
180
110
SL-
VM1
130
140
Rs
GND
VM2
RSL
110
160