參數(shù)資料
型號: KA3120
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 運動控制電子
英文描述: SPINDLE & VOICE COIL MOTOR ONE CHIP DRIVER
中文描述: VOICE COIL MOTOR CONTROLLER, 2 A, PQFP48
封裝: 14 X 14 MM, HEAT SINK, QFP-48
文件頁數(shù): 30/43頁
文件大?。?/td> 786K
代理商: KA3120
KA3120
HDD PRODUCTS
30
PRELIMINARY
MIC-99D001
January 1999
RETRACT CIRCUIT
The retract function is the operation where the VCM moves from the data zone to the parking zone when off normal
state power and abnormal power interrupt cause the spindle to stop.
Figure 11. Retract block schematic
From
Spindle
Bandgap
Reference
Retract
Enable
Iretdly
VA
Iref
×
320
Cret
Rret
Motor
Cret2
16
24
19
27
20
Low side
Control
Iret
2K
+
_
VA
2.0
V
=
Iref
Rext
Iref
2
k
320
+
-----------------------
=
Iret
×
=
Tretdly
100
μ
=
(
Iretdly
)
------------------------------------------
=
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