This report is applicable to other voltage grades when supply has been agreed by Sales/Production.
3.0 De-rating Factor
A blocking voltage de-rating factor of 0.13%/°C is applicable to this device for Tj below 25°C.
4.0 Repetitive dv/dt
Standard dv/dt is 1000V/µs.
5.0 Snubber Components
When selecting snubber components, care must be taken not to use excessively large values of snubber
capacitor or excessively small values of snubber resistor. Such excessive component values may lead to
device damage due to the large resultant values of snubber discharge current. If required, please consult
the factory for assistance.
6.0 Rate of rise of on-state current
The maximum un-primed rate of rise of on-state current must not exceed 300A/µs at any time during turnon on a non-repetitive basis. For repetitive performance, the on-state rate of rise of current must not
exceed 150A/µs at any time during turn-on. Note that these values of rate of rise of current apply to the
total device current including that from any local snubber network.
7.0 Gate Drive
The nominal requirement for a typical gate drive is illustrated below. An open circuit voltage of at least 30V
is assumed. This gate drive must be applied when using the full di/dt capability of the device.
I
GM
4A/µs
I
G
t
p1
The magnitude of IGM should be between five and ten times IGT, which is shown on page 2. Its duration
) should be 20µs or sufficient to allow the anode current to reach ten times IL, whichever is greater.
(t
p1
Otherwise, an increase in pulse current could be needed to supply the necessary charge to trigger. The
‘back-porch’ current I
magnitude in the order of 1.5 times I
should remain flowing for the same duration as the anode current and have a
G
.
GT
Data Sheet. Types N2543ZC240 to N2543ZC300 Issue 3.Page 3 of 11September, 2003
WESTCODE
8.0 Computer Modelling Parameters
I
AV
Where VT0=0.78V, rT=0.274m
R
= Supplementary thermal impedance, see table below and
th
ff
= Form factor, see table below.
Square wave Double Side Cooled0.01240.01220.01210.01190.01170.01130.011
Square wave Single Side Cooled0.02490.02480.02470.02460.02440.02410.022
Sine wave Double Side Cooled0.01680.01400.01310.01180.0112
Sine wave Single Side Cooled0.02490.02470.02460.02440.0241
An IXYS Company
8.1 Device Dissipation Calculations
2
4
=
Conduction Angle30°60°90°120°180°270°d.c.
00
⋅⋅
2
rff
Ω,
⋅⋅⋅++−
WrffVV
AVs
and:
s
Supplementary Thermal Impedance
Phase Control Thyristor Types N2543ZC240 to N2543ZC300
∆
T
AV
=
R
th
max
−=∆
TTT
Hsj
W
Form Factors
Conduction Angle30°60°90°120°180°270°d.c.
Square wave3.4642.44921.7321.4141.1491
Sine wave3.982.7782.221.8791.57
8.2 Calculating VT using ABCD Coefficients
The on-state characteristic I
(i) the well established V
(ii) a set of constants A, B, C, D, forming the coefficients of the representative equation for V
terms of I
The constants, derived by curve fitting software, are given below for both hot and cold characteristics. The
resulting values for V
that plotted.
given below:
T
T
vs. VT, on page 6 is represented in two ways;
T
and rs tangent used for rating purposes and
0
in
T
()
ln
agree with the true device characteristic over a current range, which is limited to
125°C Coefficients
A1.307753
B-0.1906143
C4.623129×10
D0.03065344
-5
⋅+⋅+⋅+=
IDICIBAV
TTTT
Data Sheet. Types N2543ZC240 to N2543ZC300 Issue 3.Page 4 of 11September, 2003
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