m63010fp Mitsumi Electronics, Corp., m63010fp Datasheet - Page 13

• Manufacturer Part Number: m63010fp
• Description: Spindle Motor Actuator Driver
• Manufacturer: Mitsumi Electronics, Corp.

Preliminary
The relationship between hall-amplifier-input and output-current-commutation at SPINDLE DRIVE
PWM carrier frequency setting
Output current setting at SLIDE
FG function at SPINDLE DRIVE
Phase delay circuit at SLIDE
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.
The FG terminal outputs the square pulse signal synchronizing with the Hall inputs [Hv+, Hv-] timing.
And, the FG terminal is open-collector output.
In this IC, since output tranjister is NPN-type tranjister, motor coil current (Io) is larger than sensing
resistance current about 20mA (TYP.) according to base current of output tranjister.
Therefore please design output current with consisting these base current.
Phase delay circuit is built in the IC to detect an output spike current, when the motor current direction
is switching.
for 3µsec.
The relationship between the hall elements and the motor output current is shown in bellow Figure.
In switching the motor current direction, Phase delay circuit switch-off all output trangister of H-bridge
current
Output
input
Hall
+
0
-
Carrier Frequency [KHz]
U
V
Capacitor [pF]
Hw+
W
U
Hv+
V
W
Hu+
U
V
*note) This PWM carrier frequency is TYP value.
65
330
W
SPINDLE MOTOR AND 4CH ACTUATOR DRIVER
220
90
(
13
Hall elements
/
180
110
16)
140
130
MITSUBISHI SEMICONDUCTORS
W
V
U
110
160
SPIN > REF
FORWARD
U
V
M63010FP
W
W
V
U
REV990118
Outer roter
SPIN < REF
REVERSE