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)： 21/43頁(yè)
文件大?。?/td> 786K
代理商： KA3120
HDD PRODUCTS
KA3120
21
PRELIMINARY
MIC-99D001
January 1999
MCLK & MASK
The MCLK is a motor clock used as the standard clock signal for the proper commutation timing of the spindle
motor. It is supplied by the ASIC.
As shown in table 1, it has different delay times depending on the mode of the spindle speed. Table 1. MCLK &
MASK Delay Time to the Spindle Speed.
After the FG_Edge signal, the MCLK occurs after a half FG_Edge delay time in the acceleration mode and 1/ 32
FG_Edge delay time in the soft switching mode.
MASK
When the coil current is abruptly changed in a short time interval, a spark voltage occurs. This spark voltage mixes
with the FG output to give the wrong spindle information to the ASIC. To eliminate the spark voltage from the FG
output, the masking block is needed.
Figure 1. BEM, FG, and MCLK in the acceleration mote
Table 1. MCLK & MASK delay time to the spindle speed
MCLK (Td)
MASK
Switching
Start-up mode
External ASIC
1ms
Hard switching
Acceleration mode
FG(n-1) / 2
FG(n-1) / 4
Hard switching
Running mode
FG(n-1) / 32
344.45
μ
s
Soft switching
Vcoil
Ldi
dt
–
=
W_BEMF
V_BEMF
U_ BEMF
U_Comp
V_Comp
W_Comp
FG
FG_Edge
MCLK
120
°
60
°
Electrically 30
°
Delay
相關(guān)PDF資料
PDF描述
KA3128 Reflective Color Sensor Assembly
KA3162 Single IGBT Gate Driver
KA317HV 3-Terminal Positive Adjustable Regulator
KA319 Dual Comparator
KA319D Dual Comparator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
KA3128 制造商:OPTEK 制造商全稱:OPTEK 功能描述:Reflective Color Sensor Assembly
KA314-76T 制造商:Advanced Interconnect 功能描述:
KA314-80G 制造商:Advanced Interconnect 功能描述:
KA3162 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Single IGBT Gate Driver
KA316-574G 制造商:Advanced Interconnect 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*