M63028FP データシートの表示（PDF） - Renesas Electronics

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M63028FP

Spindle Motor and 5ch Actuator Driver

Renesas Electronics 

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.

FORWARD Current path timing 1.

VM1

VM2

FORWARD Current path timing 2.

VM1

VM2

Current comp

Current path 1

Rs

RSL

Current comp

Rs

RSL

SL+

M

SL-

SL+

M

SL-

Current

path1

GND

Current path 2

Current

path2

Control value

GND

Control value

Io=Vrs/ Rs

Motor current

carrier period

Time

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]

820

750

330

220

180

130

110

Carrier Frequency [kHz]

28

30

65

90

110

140

160

*note) This PWM carrier frequency is TYP value.

Rev.1.0, Sep.16.2003, page 16 of 21

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