m63021fp Mitsumi Electronics, Corp., m63021fp Datasheet - Page 11

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

Preliminary
The focus and tracking channel is the voltage control drive using BTL .
The focus and tracking is the same composition.
The relationship between the differential voltage between FOIN and REF and the output voltage
The voltage gain [Gvo] is 5.0 [V/V].
FOCUS / TRACKING channel
is shown in below Figure.
5VCC
2
FOIN
REF
R
R
5VCC
Coil
R
R
FO+
FO-
6R
6R
R
R
Vo
FO-
FO+
SPINDLE MOTOR AND 5CH ACTUATOR DRIVER
=12 x (FOIN – REF)
Vo=[FO+] – [FO-]
(
11
Gvo = 12 [v/v]
Coil
/
17)
Output
voltage [V]
MITSUBISHI SEMICONDUCTORS
FOIN – REF (V)
M63021FP
FO-
FO+
REV990728
+
-
Coil