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参数资料
| 型号： | N1651QK220 |
| 厂商： | WESTCODE SEMICONDUCTORS LTD |
| 元件分类： | 晶闸管 |
| 英文描述： | 3253 A, 2200 V, SCR |
| 封装： | WESPACK-4 |
| 文件页数： | 7/11页 |
| 文件大小： | 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 5 of 11
August, 2005
8.3 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.
τp = Time Constant of rth term.
The coefficients for this device are shown in the tables below:
D.C. Double Side Cooled
Term
12
34
rp
0.01021443
3.690335×10
-3
2.456372×10
-3
1.495440×10
-3
τp
0.2287021
0.08661469
0.02748645
2.550069×10
-3
D.C. Cathode Side Cooled
Term
1
2345
rp
0.0344005
1.779034×10
-3
3.317573×10
-3
5.000175×10
-3
8.936996×10
-4
τp
1.4043858
0.9710862
0.0978218
0.03880263
1.285346×10
-3
9.0 Reverse recovery ratings
(i) Qra is based on 50% Irm chord as shown in Fig. 1
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
=
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