M0367WC140 View Datasheet(PDF) - Westcode -> Ixys
Part Name
Description
MFG CO.
'M0367WC140' PDF : 11 Pages View PDF
WESTCODE An IXYS Company
7.0 Computer Modelling Parameters
7.1 Device Dissipation Calculations
Soft Recovery Diode Types M0367WC140 to M0367WC280
I AV = − VT 0 +
VT 0 + 4 ⋅ ff 2 ⋅ rT ⋅WAV
2 ⋅ ff 2 ⋅ rT
Where VT0 =1.28V, rT = 0.92mΩ
ff = form factor (normally unity for fast diode applications)
WAV
=
∆T
Rth
∆T = Tj(MAX ) − TK
7.2 Calculation of VF using ABCD Coefficients
The forward characteristic IF Vs VF, 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, and D forming the coefficients of the representative equation for VF in
terms of IF given below:
VF = A + B ⋅ ln(IF ) + C ⋅ I F + D ⋅ IF
The constants, derived by curve fitting software, are given in this report for hot characteristics. The
resulting values for VF agree with the true device characteristic over a current range, which is limited to
that plotted.
25°C Coefficients 125°C Coefficients
A
0.72786582
0.213363381
B
0.08415369
0.1838858
C
4.9174×10-4
D
0.01098145
6.93289×10-4
7.80495×10-4
8.0 Frequency Ratings
The curves illustrated in figures 8 to 16 are for guidance only and are superseded by the maximum ratings
shown on page 1.
9.0 Square wave ratings
These ratings are given for load component rate of rise of forward current of 100 and 500 A/µs.
10.0 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.
Data Sheet. Types M0367WC180 to M0367WC280 Issue 1
Page 5 of 11
August, 2004
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