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參數(shù)資料
| 型號： | MPM22CUC450B |
| 廠商： | INTEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, 450 MHz, MICROPROCESSOR, XMA |
| 封裝： | MMC-2 |
| 文件頁數(shù)： | 43/64頁 |
| 文件大?。?/td> | 778K |
| 代理商： | MPM22CUC450B |
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Pentium
III Processor Mobile Module MMC-2
42
Datasheet
245304-004
Equation 14.
(The nearest standard 1% value is 66.5 k
. The example will continue with R2= 66.5 k.)
Rearranging Equation 8 to solve for C9 yields the following result, as shown in Equation 15.
Equation 15.
Now a value for C9 can be calculated. See Equation 16 below.
Equation 16.
C 9= 0.354
F
(A close standard value of 0.33
F will yield a t_delay of 466.0 S.)
The ramp-up time, t_ramp, is defined as shown in Equation 17 below.
Equation 17.
If M1 has a VGS(sat) of -2.4V, then see Equation 18 below.
Equation 18.
t_ramp = 948.8
S
The maximum current during the power-up ramp is shown in Equation 19 below.
Equation 19.
If the total capacitance, Ctotal on the V_DC bus, is 119.4
F, then see Equation 20 below.
Equation 20.
Imax = 0.994A
From the values assumed and calculated, t_delay = 466.0
S, t_ramp = 949.0 S, and Imax = 944
mA.
R2
Vg R16
.
V_DC Vg
,
R2
66.67 k
=
C9
t_delay
R2 ln 1
Vt
V_DC
Vg
.
t_ramp
R2 C9
.
ln 1
Vsat
Vgs
.
t_delay
≈
Imax
Ctotal
t
v
d
Ctotal
V_DC
t_ramp
.
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