參數(shù)資料
型號(hào): KA3120
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 運(yùn)動(dòng)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(yè)數(shù): 25/43頁(yè)
文件大?。?/td> 786K
代理商: KA3120
HDD PRODUCTS
KA3120
25
PRELIMINARY
MIC-99D001
January 1999
Figure 5. Motor start-up sequence
Figure 6. FG vs PWMSP duty variation
Open
High
Open
Low
Target RPM
Rotation
Speed
Internal
Ready
Internal
Switching Mode
Change
High
Open
Start-Up
Hard-Switching
Soft-Switching
VCM Enable
100msec
+1%
1%
CNTL1
SPIN ON
CNTL2
CNTL3
VCM ON
High
10msec
CASE1
: High gain
High, 5V
Low, 0V
CASE1
: Low gain
High, 5V
Low, 0V
FG
Duty (%)
100%
D%
0
F trarget
FG
Frequency
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