參數(shù)資料
型號： N1651QK220
廠商： WESTCODE SEMICONDUCTORS LTD
元件分類： 晶閘管
英文描述： 3253 A, 2200 V, SCR
封裝： WESPACK-4
文件頁數(shù)： 6/11頁
文件大?。?/td> 272K
代理商： N1651QK220
WESTCODE
WESTCODE An IXYS Company
Wespack Phase Control Thyristor Types N1651QK200 to N1651QK220
Provisional Data Sheet. Types N1651QK200 to N1651QK220 Issue 1
Page 4 of 11
August, 2005
8.0 Computer Modelling Parameters
8.1 Device Dissipation Calculations
T
AV
T
AV
r
ff
W
r
ff
V
I
+
=
2
0
2
4
and:
K
j
th
AV
T
R
T
W
=
=
max
Where VT0=1.060V, rT=0.317m
,
Rth = Supplementary thermal impedance, see table below and
ff = Form factor, see table below.
Supplementary Thermal Impedance
Conduction Angle
30°
60°
90°
120°
180°
270°
d.c.
Square wave Double Side Cooled
0.0269
0.0246
0.0237
0.0217
0.0202
0.0188
0.0180
Square wave Cathode Side Cooled
0.0531
0.0501
0.0485
0.0475
0.0463
0.0452
0.0444
Sine wave Double Side Cooled
0.0245
0.0221
0.0208
0.0189
0.0180
Sine wave Cathode Side Cooled
0.0497
0.0470
0.0460
0.0455
0.0444
Form Factors
Conduction Angle
30°
60°
90°
120°
180°
270°
d.c.
Square wave
3.46
2.45
2
1.73
1.41
1.15
1
Sine wave
3.98
2.78
2.22
1.88
1.57
8.2 Calculating VT using ABCD Coefficients
The on-state characteristic IT vs. VT, on page 6 is represented in two ways;
(i)
the well established VT0 and rT 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.
25°C Coefficients
125°C Coefficients
A
0.8500422
A
0.4502948
B
0.01104288
B
0.08416794
C
1.74162×10
-4
C
2.78021×10
-4
D
7.431773×10
-3
D
1.236829×10
-3
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