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WESTCODE
An IXYS Company
Date:- 24 May, 2002
Data Sheet Issue:- 2
Provisional Data
Extra Fast Recovery Diode
Type F1600NC120
Development Type No. Fx021NC120
Absolute Maximum Ratings
VRRM
VRSM
VOLTAGE RATINGS
Repetitive peak reverse voltage, (note 1)
Non-repetitive peak reverse voltage, (note 1)
MAXIMUM
LIMITS
1200
1300
UNITS
V
V
OTHER RATINGS
IF(AV)
IF(AV)
IF(AV)
IF(RMS)
IF(d.c.)
IFSM
IFSM2
I2t
I2t
THS
Tstg
Mean forward current, Tsink=55°C, (note 2)
Mean forward current. Tsink=100°C, (note 2)
Mean forward current. Tsink=100°C, (note 3)
Nominal RMS forward current, Tsink=25°C, (note 2)
D.C. forward current, Tsink=25°C, (note 4)
Peak non-repetitive surge tp=10ms, VRM=0.6VRRM, (note 5)
Peak non-repetitive surge tp=10ms, VRM10V, (note 5)
I2t capacity for fusing tp=10ms, VRM=0.6VRRM, (note 5)
I2t capacity for fusing tp=10ms, VRM10V, (note 5)
Operating temperature range
Storage temperature range
Notes:-
1) De-rating factor of 0.13% per °C is applicable for Tj below 25°C.
2) Double side cooled, single phase; 50Hz, 180° half-sinewave.
3) Single side cooled, single phase; 50Hz, 180° half-sinewave.
4) Double side cooled.
5) Half-sinewave, 125°C Tj initial.
MAXIMUM
LIMITS
1326
605
337
2673
2186
20000
22000
2.00x106
2.42x106
-40 to +125
-40 to +150
UNITS
A
A
A
A
A
A
A
A2s
A2s
°C
°C
Provisional Data Sheet. Type F1600NC120 Issue 2
Page 1 of 11
May, 2002

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Characteristics
Extra Fast Diode Type F1600NC120
PARAMETER
VFM Maximum peak forward voltage
V0
rS
V01
rS1
VFRM
VFRM
Threshold voltage
Slope resistance
Threshold voltage
Slope resistance
Maximum forward recovery voltage
Maximum forward recovery voltage
IRRM Peak reverse current
Qrr Recovered charge
Qra Recovered charge, 50% Chord
Irm Reverse recovery current
trr Reverse recovery time, 50% Chord
Qrr Recovered charge
Qra Recovered charge, 50% Chord
Irm Reverse recovery current
trr Reverse recovery time, 50% Chord
R
th(j-hs)
Thermal resistance, junction to heatsink
F Mounting force
Wt Weight
MIN.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
19
-
TYP.
-
-
-
-
-
-
-
-
-
-
50
20
35
1.0
700
550
480
2.3
-
-
-
510
MAX. TEST CONDITIONS (Note 1)
UNITS
1.55 IFM=1000A
1.77 IFM=1600A
V
1.32
Over current range 1326 –3978A (Note 2)
0.268
V
m
1.373
Over current range 1600 – 4800A
0.247
V
m
20 di/dt = 1000A/µs, 25ºC
V
30 di/dt = 1000A/µs
V
275 Rated VRRM
50 Rated VRRM, Tj=25°C
mA
- µC
30 IFM=1000A, tp=1000µs, di/dt=60A/µs,
- Vr=50V (Note 3)
µC
A
- µs
- µC
- IFM=1600A, tp=500µs, di/dt=800A/µs,
- Vr=800V
µC
A
- µs
0.024 Double side cooled
0.048 Single side cooled
K/W
26 kN
-g
Notes:-
1) Unless otherwise indicated Tj=125°C.
2) V0 and rs were used to calculate the current ratings illustrated on page one
3) Figures 3 to 6 were compiled using these conditions
Provisional Data Sheet. Type F1600NC120 Issue 2
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Notes on Ratings and Characteristics
1.0 Voltage Grade Table
Extra Fast Diode Type F1600NC120
Voltage Grade
12
VRRM
(V)
1200
VRSM
(V)
1300
VR dc
(V)
600
2.0 De-rating Factor
A blocking voltage de-rating factor of 0.13% per °C is applicable to this device for Tj below 25°C.
3.0 ABCD Constants
These constants (applicable only over current range of VF characteristic in Figure 1) are the coefficients of
the expression for the forward characteristic given below:
VF = A + B ln(I F ) + C I F + D I F
where IF = instantaneous forward current.
4.0 Reverse recovery ratings
(i) Qra is based on 50% Irm chord as shown in Fig.(a) below.
(ii) Qrr is based on a 150µs integration time.
150 µs
I.e. Qrr = irr .dt
0
(iii)
K Factor = t1
t2
Provisional Data Sheet. Type F1600NC120 Issue 2
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Extra Fast Diode Type F1600NC120
5.0 Reverse Recovery Loss
The following procedure is recommended for use where it is necessary to include reverse recovery loss.
From waveforms of recovery current obtained from a high frequency shunt (see Note 1) and reverse
voltage present during recovery, an instantaneous reverse recovery loss waveform must be constructed.
Let the area under this waveform be E joules per pulse. A new sink temperature can then be evaluated
from:
[ ]TSINK = TJ (MAX ) E k + f Rth(J Hs)
Where k = 0.2314 (°C/W)/s
E = Area under reverse loss waveform per pulse in joules (W.s.)
f = Rated frequency in Hz at the original sink temperature.
Rth(J-Hs) = d.c. thermal resistance (°C/W)
The total dissipation is now given by:
W(tot ) = W(original ) + E f
NOTE 1 - Reverse Recovery Loss by Measurement
This device has a low reverse recovered charge and peak reverse recovery current. When measuring the
charge, care must be taken to ensure that:
(a) AC coupled devices such as current transformers are not affected by prior passage of high
amplitude forward current.
(b) A suitable, polarised, clipping circuit must be connected to the input of the measuring oscilloscope
to avoid overloading the internal amplifiers by the relatively high amplitude forward current signal.
(c) Measurement of reverse recovery waveform should be carried out with an appropriate critically
damped snubber, connected across diode anode to cathode. The formula used for the calculation of this
snubber is shown below:
R2 = 4 Vr
CS
di
dt
Where: Vr = Commutating source voltage
CS = Snubber capacitance
R = Snubber resistance
Provisional Data Sheet. Type F1600NC120 Issue 2
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6.0 Computer Modelling Parameters
6.1 Device Dissipation Calculations
Extra Fast Diode Type F1600NC120
I AV = − Vo +
Vo + 4 ff rs WAV
2 ff rs
Where V0 = 1.32V, rs = 0.268m
ff = form factor (normally unity for fast diode applications)
WAV
=
T
Rth
T = Tj(MAX ) THs
6.2 Calculation of VF using ABCD Coefficients
The forward characteristic IF Vs VF, on page 6 is represented in two ways;
(i) the well established Vo and rs 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 IF + 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.
125°C Coefficients
A 0.374060321
B 0.08526548
C 6.73844x10-5
D 0.01643
Provisional Data Sheet. Type F1600NC120 Issue 2
Page 5 of 11
May, 2002