m63021fp Mitsumi Electronics, Corp., m63021fp Datasheet - Page 7

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

The loading channel is the circuit of BTL voltage drive. This circuit has the referential input. Output swing is determined with
The input terminal is high impedance. It is possible to do variable a gain by external resistor.
In case of one MCU port, if use three state port, it is possible for this channel to have the stop function.
This IC has MUTE terminal (MU1).
It is possible to control ON / OFF of the channel by external logic inputs.
In case of SELECT1, the bias of all circuit becomes OFF.
Therefore, this mode is available in order to reduce the power dissipation when the waiting mode.
In case of SELECT2,the bias of all channel becomes ON.
Preliminary
Vin x 8. Also,it is possible for this channel to use for the slide motor , the focus coil and the tracking coil.
Loading channel
Standby function
Brake select function
This IC has BRS terminal (BRS).
It is possible for a braking timiming of Spindle drive to select which the short brake or the reverse brake by BRS.
It shuould select the short brake in case of high speed system and please change to the reverse brake when the rotation
speed becomes enough low. It is available when the SPIN voltage is low than the reference voltage.
SELECT2
SELECT1
Logic control
L / Open
BRS
Hi
REF
LOIN+
L/Open
MU1
VM3
H
LOADING
Channel
Loading Slide1
On
Off
Reverse Brake
SPIN < REF
Short Brake
+
LO+
-
LO-
Vo
On
Off
SPINDLE MOTOR AND 5CH ACTUATOR DRIVER
(
M
Reverse
Forward
Slide2
Drive
7
On
Off
REF < SPIN
/
Forward
Forward
17)
channel
Focus Tracking Spindle
On
Off
MITSUBISHI SEMICONDUCTORS
On
Off
M63021FP
On
Off
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