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参数资料
| 型号： | R1280NS20L |
| 厂商： | WESTCODE SEMICONDUCTORS LTD |
| 元件分类： | 晶闸管 |
| 英文描述： | 2571 A, 2000 V, SCR |
| 文件页数： | 7/12页 |
| 文件大小： | 702K |
| 代理商： | R1280NS20L |
WESTCODE
WESTCODE An IXYS Company
Distributed Gate Thyristor Types R1280NS18# to R1280NS25#
Data Sheet. Type R1280NS18# to R1280NS25# Issue 4
Page 4 of 12
March, 2003
9.0 Frequency Ratings
The curves illustrated in figures 10 to 18 are for guidance only and are superseded by the maximum
ratings shown on page 1.
10.0 Square wave ratings
These ratings are given for load component rate of rise of forward current of 100 and 500 A/s.
11.0 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.
12.0 Maximum Operating Frequency
The maximum operating frequency is set by the on-state duty, the time required for the thyristor to turn off
(tq) and for the off-state voltage to reach full value (tv), i.e.
v
q
pulse
t
f
+
=
1
max
13.0 On-State Energy per Pulse Characteristics
These curves enable rapid estimation of device dissipation to be obtained for conditions not covered by
the frequency ratings.
Let Ep be the Energy per pulse for a given current and pulse width, in joules
Let Rth(J-Hs) be the steady-state d.c. thermal resistance (junction to sink)
and TSINK be the heat sink temperature.
Then the average dissipation will be:
()
(
)
Hs
J
th
AV
SINK
P
AV
R
W
T
and
f
E
W
=
=
125
.)
(max
14.0 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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