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參數(shù)資料
| 型號： | M1858NC120 |
| 廠商： | WESTCODE SEMICONDUCTORS LTD |
| 元件分類： | 參考電壓二極管 |
| 英文描述： | 1858 A, 1200 V, SILICON, RECTIFIER DIODE |
| 文件頁數(shù)： | 7/11頁 |
| 文件大?。?/td> | 356K |
| 代理商： | M1858NC120 |
WESTCODE
WESTCODE An IXYS Company
Fast Recovery Diode Types M1858NC120 to M1858NC160
Data Sheet. Types M1858NC120 to M1858NC160 Issue 1
Page 5 of 11
March, 2004
7.0 Computer Modelling Parameters
7.1 Device Dissipation Calculations
T
AV
T
AV
r
ff
W
r
ff
V
I
+
=
2
0
2
4
Where VT0 =1.127V, rT = 0.127m
ff = form factor (normally unity for fast diode applications)
K
MAX
j
th
AV
T
R
T
W
=
=
)
(
7.2 Calculation of VF using ABCD Coefficients
The forward characteristic IF Vs VF, on page 6 is represented in two ways;
(i)
the well established VT0 and rT tangent used for rating purposes and
((iiii))
a set of constants A, B, C, and D forming the coefficients of the representative equation for VF in
terms of IF given below:
F
I
D
I
C
I
B
A
V
+
+
+
=
)
ln(
The constants, derived by curve fitting software, are given in this report for both hot and cold
characteristics. The resulting values for VF agree with the true device characteristic over a current range,
which is limited to that plotted.
25°C Coefficients
125°C Coefficients
A
0.61885059
0.29953373
B
0.04557522
0.0634842
C
4.3146×10
-5
3.47429×10
-5
D
8.10383×10
-3
0.01058562
8.0 Frequency Ratings
The curves illustrated in figures 8 to 16 are for guidance only and are superseded by the maximum ratings
shown on page 1.
9.0 Square wave ratings
These ratings are given for load component rate of rise of forward current of 100 and 500 A/s.
10.0 Duty cycle lines
The 100% duty cycle is represented on all the ratings by a straight line. Other duties can be included as
parallel to the first.
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