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): 32/43頁
文件大?。?/td> 786K
代理商: KA3120
KA3120
HDD PRODUCTS
32
PRELIMINARY
MIC-99D001
January 1999
POWER ON RESET
The power-on reset circuit monitors the voltage level of both +5V and +12V power supplies. The power
on reset
circuit disables the spindle out block, the whole VCM block, and the digital ASIC when the power supply voltage
level drops below the reference voltage.
Figure 13. Power on reset function
Default (pin4, pin42 : not connected)
Vhys
T
Vth
Vbe
POR
VDD, VCC
Tdly
T
Vhys
4.2
mV
=
VDD Vhys
5
V
;
(
)
--------------------
5
R
5
Vhys
×
=
VDD Vhys
12
V
;
(
)
--------------------
8
R
8
Vhys
×
=
VDD th
VCC th
,
4.1
V
9.4
V
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