Soft Recovery Diode

Date:- 20 Oct 2014
Data Sheet Issue:- 2
Soft Recovery Diode
Type M1494NC180 to M1494NC250
Absolute Maximum Ratings
VOLTAGE RATINGS
MAXIMUM
LIMITS
UNITS
VRRM
Repetitive peak reverse voltage, (note 1)
1800-2500
V
VRSM
Non-repetitive peak reverse voltage, (note 1)
1900-2600
V
MAXIMUM
LIMITS
UNITS
OTHER RATINGS
IF(av)M
Maximum average forward current, Tsink=55°C, (note 2)
1494
A
IF(av)M
Maximum average forward current. Tsink=100°C, (note 2)
705
A
IF(av)M
Maximum average forward. Tsink=100°C, (note 3)
402
A
IF(RMS)
Nominal RMS forward current, Tsink=25°C, (note 2)
2982
A
IF(d.c.)
D.C. forward current, Tsink=25°C, (note 4)
2506
A
IFSM
Peak non-repetitive surge tp=10ms, VRM=60%VRRM, (note 5)
19.6
kA
IFSM2
Peak non-repetitive surge tp=10ms, VRM10V, (note 5)
21.5
kA
I2 t
I2t capacity for fusing tp=10ms, VRM=60%VRRM, (note 5)
1.92 × 106
A2s
I2 t
I2t capacity for fusing tp=10ms, VRM10V, (note 5)
2.31 × 106
A2s
Tj op
Operating temperature range
-40 to +125
°C
Tstg
Storage temperature range
-40 to +150
°C
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.
Data Sheet. Types M1494NC180 to M1494NC250 Issue 2
Page 1 of 11
October 2014
Soft Recovery Diode Types M1494NC180 to M1494NC250
Characteristics
PARAMETER
MIN.
TYP.
MAX. TEST CONDITIONS (Note 1)
UNITS
-
-
1.85
IFM=3000A
V
-
-
2.34
IFM=4500A
V
VFM
Maximum peak forward voltage
VT0
Threshold voltage
-
-
1.150
V
rT
Slope resistance
-
-
0.265
m
VFRM
Maximum forward recovery voltage
-
-
45
di/dt = 1000A/µs
-
-
28
di/dt = 1000A/µs, Tj= 25°C
IRRM
Peak reverse current
-
-
85
Rated VRRM
Qrr
Recovered charge
-
815
-
Qra
Recovered charge, 50% Chord
-
275
380
Irm
Reverse recovery current
-
140
-
trr
Reverse recovery time, 50% Chord
-
3.9
-
RthJK
Thermal resistance, junction to heatsink
-
-
0.022
Double side cooled
-
-
0.044
Single side cooled
F
Mounting force
19
-
26
Wt
Weight
-
510
-
V
mA
µC
IFM=1000A, tp=1000µs, di/dt=60A/µs,
Vr=50V, 50% Chord.
A
µs
K/W
Note 2
kN
g
Notes:1) Unless otherwise indicated Tj=125°C.
2) For other clamp forces, please consult factory.
Data Sheet. Types M1494NC180 to M1494NC250 Issue 2
Page 2 of 11
µC
October 2014
Soft Recovery Diode Types M1494NC180 to M1494NC250
Notes on Ratings and Characteristics
1.0 Voltage Grade Table
Voltage Grade
VRRM
(V)
1800
2000
2200
2400
2500
18
20
22
24
25
VRSM
(V)
1900
2100
2300
2500
2600
VR dc
(V)
1150
1250
1350
1450
1500
2.0 De-rating Factor
A blocking voltage de-rating factor of 0.13% per °C is applicable to this device for T j 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 150s integration time.
150s
I.e.
Qrr 
i
rr
.dt
0
(iii)
K Factor 
Data Sheet. Types M1494NC180 to M1494NC250 Issue 2
t1
t2
Page 3 of 11
October 2014
Soft Recovery Diode Types M1494NC180 to M1494NC250
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 ( JK )

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 
Where:
Vr
CS  di dt
Vr = Commutating source voltage
CS = Snubber capacitance
R = Snubber resistance
6.0 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.
Data Sheet. Types M1494NC180 to M1494NC250 Issue 2
Page 4 of 11
October 2014
Soft Recovery Diode Types M1494NC180 to M1494NC250
7.0 Computer Modelling Parameters
7.1 Device Dissipation Calculations
I AV
 Vo  Vo  4  ff 2  rs  WAV

2  ff 2  rs
Where VT0 =1.15V, rT = 0.265m

ff = form factor (normally unity for fast diode applications)
WAV 
T
Rth
T  T j ( 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( I F )  C  I F  D  I F
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
0.6059922
-0.0548532
B
0.0483707
0.1612135
C
9.492610×10-5
2.274044×10-4
D
0.0112304
2.917716×10-4
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 M1494NC180 to M1494NC250 Issue 2
Page 5 of 11
October 2014
Soft Recovery Diode Types M1494NC180 to M1494NC250
Curves
Figure 1 – Forward characteristics of Limit device
Figure 2 – Maximum forward recovery voltage
100
10000
M1494NC180-250
Issue 2
M1494NC180-250
Issue 2
125°C
125°C
25°C
Maximum forward recovery voltage - V FRM (V)
Instantaneous forward current - IFM (A)
25°C
1000
100
0
0.5
1
1.5
2
2.5
3
10
1
100
3.5
1000
Maximum instantaneous forward voltage - VFM (V)
Figure 3 - Recovered charge, Qrr
Figure 4 - Recovered charge, Qra (50% chord)
10000
10000
M1494NC180-250
Issue 2
M1494NC180-250
Issue 2
Tj = 125°C
Tj = 125°C
Recovered charge, 50% chord - Qra (µC)
Total recovered charge - Qrr (µC)
10000
Rate of rise of forward current - di/dt (A/µs)
5000A
2000A
1000A
500A
1000
5000A
2000A
1000
1000A
500A
100
100
10
100
10
1000
Data Sheet. Types M1494NC180 to M1494NC250 Issue 2
100
1000
Commutation rate - di/dt (A/µs)
Commutation rate - di/dt (A/µs)
Page 6 of 11
October 2014
Soft Recovery Diode Types M1494NC180 to M1494NC250
Figure 5 - Maximum reverse current, Irm
Figure 6 - Maximum recovery time, trr (50% chord)
1000
10
M1494NC180-250
Issue 2
Tj = 125°C
Recovery time, 50% chord - trr (µs)
Tj = 125°C
Reverse recovery current - Irm (A)
M1494NC180-250
Issue 2
5000A
2000A
1000A
500A
100
10
5000A
2000A
1000A
500A
1
10
100
1000
10
100
Commutation rate - di/dt (A/µs)
Figure 7 – Reverse recovery energy per pulse
10000
Figure 8 - Sine wave energy per pulse
1.00E+02
M1494NC180-250
Issue 2
Tj = 125°C
VR=400V
0.22µF, 10
Snubber
M1494NC180-250
Issue 2
Tj = 125°C
Energy per pulse (J)
1.00E+01
Energy per pulse - Er (mJ)
1000
Commutation rate - di/dt (A/µs)
5000A
2000A
1000A
500A
1000
5000A
2000A
1000A
500A
250A
1.00E+00
1.00E-01
100
10
100
1.00E-02
1.00E-05
1000
Commmutation rate - di/dt (A/µs)
Data Sheet. Types M1494NC180 to M1494NC250 Issue 2
1.00E-04
1.00E-03
1.00E-02
Pulse width (s)
Page 7 of 11
October 2014
Soft Recovery Diode Types M1494NC180 to M1494NC250
Figure 9 - Sine wave frequency vs. pulse width
Figure 10 - Sine wave frequency vs. pulse width
1.00E+05
1.00E+05
M1494NC180-250
Issue 2
M1494NC180-250
Issue 2
TK = 55°C
TK= 85°C
250A
500A
100% Duty Cycle
100% Duty Cycle
500A
1.00E+04
1.00E+04
Frequency (Hz)
Frequency (Hz)
1000A
2000A
1000A
2000A
5000A
1.00E+03
1.00E+03
1.00E+02
1.00E-05
1.00E-04
1.00E-03
5000A
1.00E+02
1.00E-05
1.00E-02
1.00E-04
Pulse width (s)
Figure 11 - Square wave energy per pulse
1.00E+02
1.00E+02
M1494NC180-250
Issue 2
di/dt =100A/µs
di/dt =500A/µs
Tj = 125°C
Tj = 125°C
1.00E+01
Energy per pulse (J)
1.00E+01
Energy per pulse (J)
1.00E-02
Figure 12 - Square wave energy per pulse
M1494NC180-250
Issue 2
1.00E+00
5000A
2000A
1000A
500A
250A
1.00E-01
1.00E-02
1.00E-05
1.00E-03
Pulse width (s)
1.00E+00
5000A
2000A
1000A
500A
250A
1.00E-01
1.00E-04
1.00E-03
1.00E-02
1.00E-05
1.00E-02
Pulse width (s)
Data Sheet. Types M1494NC180 to M1494NC250 Issue 2
1.00E-04
1.00E-03
1.00E-02
Pulse width (s)
Page 8 of 11
October 2014
Soft Recovery Diode Types M1494NC180 to M1494NC250
Figure 13 - Square wave frequency vs. pulse width
Figure 14 - Square wave frequency vs. pulse width
1.00E+05
1.00E+05
M1494NC180-250
Issue 2
M1494NC180-250
Issue 2
di/dt =100A/µs
di/dt =500A/µs
TK = 85°C
TK = 85°C
250A
250A
100% Duty Cycle
100% Duty Cycle
500A
1.00E+04
1.00E+04
500A
1000A
Frequency (Hz)
Frequency (Hz)
2000A
5000A
1.00E+03
1.00E+03
1000A
2000A
5000A
1.00E+02
1.00E+02
1.00E+01
1.00E-05
1.00E-04
1.00E-03
Pulse width (s)
Figure 15 - Square wave frequency vs. pulse width
1.00E+05
1.00E+01
1.00E-05
1.00E-02
1.00E-04
1.00E-03
Pulse width (s)
1.00E-02
Figure 16 - Square wave frequency vs. pulse width
1.00E+05
M1494NC180-250
Issue 2
M1494NC180-250
Issue 2
di/dt =500A/µs
di/dt =100A/µs
TK=55°C
TK = 55°C
250A
500A
100% Duty Cycle
100% Duty Cycle
1.00E+04
1.00E+04
1000A
500A
5000A
Frequency (Hz)
Frequency (Hz)
2000A
1.00E+03
1.00E+02
1.00E+01
1.00E-05
1.00E+03
1000A
2000A
5000A
1.00E+02
1.00E-04
1.00E-03
1.00E+01
1.00E-05
1.00E-02
Pulse width (s)
Data Sheet. Types M1494NC180 to M1494NC250 Issue 2
Page 9 of 11
1.00E-04
1.00E-03
Pulse width (s)
1.00E-02
October 2014
Soft Recovery Diode Types M1494NC180 to M1494NC250
Figure 17 – Maximum surge and I2t ratings
100000
1.00E+08
Total peak half sine surge current - I FSM (A)
M1494NC180-250
Issue 2
I t: VRRM10V
2
2
2
2
I t: VR=60% VRRM
10000
1.00E+07
IFSM: VRRM10V
IFSM: VR=60% VRRM
1000
1
3
5
10
1
Duration of surge (ms)
5
10
Maximum I t (A s)
Tj (initial) = 125°C
1.00E+06
50 100
Duration of surge (cycles @ 50Hz)
Figure 18 – Transient thermal impedance
0.1
M1494NC180-250
Issue 2
SSC 0.044K/W
Thermal impedance (K/W)
DSC 0.022K/W
0.01
0.001
0.0001
0.0001
0.001
0.01
0.1
1
10
100
Time (s)
Data Sheet. Types M1494NC180 to M1494NC250 Issue 2
Page 10 of 11
October 2014
Soft Recovery Diode Types M1494NC180 to M1494NC250
Outline Drawing & Ordering Information
ORDERING INFORMATION
NC

0
Fixed
outline code
Voltage code
VDRM/100
18-25
Fixed code
M1494
Fixed
Type Code
(Please quote 10 digit code as below)
Order code: M1494NC180 – 1800V VRRM, 27.7mm clamp height capsule.
IXYS Semiconductor GmbH
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D-68623 Lampertheim
Tel: +49 6206 503-0
Fax: +49 6206 503-627
E-mail: [email protected]
IXYS Corporation
1590 Buckeye Drive
Milpitas CA 95035-7418
Tel: +1 (408) 547 9000
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E-mail: [email protected]
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Tel: +44 (0)1249 444524
Fax: +44 (0)1249 659448
E-mail: [email protected]
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The information contained herein is confidential and is protected by Copyright. The information may not be used or disclosed
except with the written permission of and in the manner permitted by the proprietors IXYS UK Westcode Ltd.
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IXYS Long Beach, Inc
2500 Mira Mar Ave, Long Beach
CA 90815
Tel: +1 (562) 296 6584
Fax: +1 (562) 296 6585
E-mail: [email protected]
© IXYS UK Westcode Ltd.
In the interest of product improvement, IXYS UK Westcode Ltd reserves the right to change specifications at any time without
prior notice.
Devices with a suffix code (2-letter, 3-letter or letter/digit/letter combination) added to their generic code are not necessarily
subject to the conditions and limits contained in this report.
Data Sheet. Types M1494NC180 to M1494NC250 Issue 2
Page 11 of 11
October 2014