N1265LS160
| Model | N1265LS160 |
| Description | Silicon Controlled Rectifier, 2431 A, 1600 V, SCR |
| PDF file | Total 12 pages (File size: 322K) |
| Chip Manufacturer | IXYS |
WESTCODE
An IXYS Company
8.3 D.C. Thermal Impedance Calculation
Phase Control Thyristor Types N1265LS120 to N1265LS160
−
t
τ
r
t
=
∑
r
p
⋅
1
−
e
p
p
=
1
p
=
n
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.
r
p
= Amplitude of p
th
term.
τ
p
= Time Constant of r
th
term.
The coefficients for this device are shown in the tables below:
D.C. Double Side Cooled
Term
1
0.01771901
0.7085781
2
4.240625×10
0.1435833
-3
3
6.963806×10
0.03615196
-3
4
3.043661×10
2.130842×10
-3
-3
r
p
τ
p
D.C. Single Side Cooled
Term
1
0.03947164
4.090062
2
0.01022837
1.078983
3
8.789912×10
0.08530917
-3
4
4.235162×10
0.01128791
-3
5
1.907609×10
1.240861×10
-3
-3
r
p
τ
p
9.0 Reverse recovery ratings
(i) Q
ra
is based on 50% I
rm
chord as shown in Fig. 1
Fig. 1
(ii) Q
rr
is based on a 150µs integration time i.e.
150
µ
s
Q
rr
=
(iii)
∫
i
0
rr
.
dt
t
1
K Factor
=
t
2
Data Sheet. Types N1265LS120 to N1265LS160 Issue 2
Page 5 of 11
April, 2005
