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參數(shù)資料
| 型號： | N4400TC220 |
| 廠商： | WESTCODE SEMICONDUCTORS LTD |
| 元件分類： | 晶閘管 |
| 英文描述： | 8670 A, 2200 V, SCR |
| 文件頁數(shù)： | 5/10頁 |
| 文件大?。?/td> | 174K |
| 代理商： | N4400TC220 |
WESTCODE
Positive development in power electronics
N4400TC200 to N4400TC280
Data Sheet. Types N4400TC200 to N4400TC280 Issue 1.
Page 4 of 10
April, 2002
The on-state characteristic IT vs. VT, on page 5 is represented in two ways;
(i)
the well established V0 and rs tangent used for rating purposes and
(ii)
a set of constants A, B, C, D, forming the coefficients of the representative equation for VT in
terms of IT given below:
()
T
I
D
I
C
I
B
A
V
+
+
+
=
ln
The constants, derived by curve fitting software, are given below for both hot and cold characteristics. The
resulting values for VT agree with the true device characteristic over a current range, which is limited to
that plotted.
125°C Coefficients
A
0.318207856
B
0.08186362
C
8.705845×10
-5
D
-0.680771×10
-3
7.3 D.C. Thermal Impedance Calculation
∑
=
=
n
p
t
p
t
p
e
r
1
τ
Where p = 1 to n, n is the number of terms in the series and:
t =Duration of heating pulse in seconds.
r
t
=Thermal resistance at time t.
rp =Amplitude of pth term.
τ
p =Time Constant of rth term.
D.C. Double Side Cooled
Term
1
2
3
rp
4.293445×10
-3
2.542182×10
-3
1.167986×10
-3
τ
p
0.8365194
0.176198
0.02000819
D.C. Single Side Cooled
Term
1
234
rp
9.899658×10
-3
2.731068×10
-3
2.619106×10
-3
1.049687×10
-3
τ
p
5.623142
1.132481
0.1461472
0.01849926
8.0 Reverse recovery ratings
(i) Qra is based on 50% Irm chord as shown in Fig. 1.
(ii) Qrr is based on a 150
s integration time.
i.e.
∫
=
s
rr
dt
i
Q
150
0
.
(iii)
2
1
t
Factor
K
=
Fig. 1
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