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M0588LC440 Datasheet
Soft Recovery Diode

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WESTCODE
Date:- 15 Nov, 2001
Data Sheet Issue:- 1
Fast Recovery Diode
Types M0588LC400 to M0588LC450
Absolute Maximum Ratings
VRRM
VRSM
VOLTAGE RATINGS
Repetitive peak reverse voltage, (note 1)
Non-repetitive peak reverse voltage, (note 1)
MAXIMUM
LIMITS
4000-4500
4100-4600
UNITS
V
V
IF(AV)
IF(AV)
IF(AV)
IF(RMS)
IF(d.c.)
IFSM
IFSM2
I2t
I2t
THS
Tstg
OTHER RATINGS (note 6)
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, 150°C Tj initial.
MAXIMUM
LIMITS
588
389
237
1108
969
3955
4350
78.2×103
94.6×103
-40 to +150
-40 to +150
UNITS
A
A
A
A
A
A
A
A2s
A2s
°C
°C
Data Sheet. Types M0588LC400 to M0588LC450 Issue 1
Page 1 of 11
November, 2001


M0588LC440 Datasheet
Soft Recovery Diode

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Characteristics
M0588LC400 to M0588LC450
PARAMETER
VFM Maximum peak forward voltage
V0 Threshold voltage
rS Slope resistance
VFRM Maximum forward recovery voltage
IRRM Peak reverse current
Qrr Reverse Recovery Charge
Qra Recovered charge, 50% Chord
Irm Reverse Recovery Current
trr Reverse recovery time, 50% Chord
Rth(j-hs) Thermal resistance, junction to heatsink
F Mounting force
Wt Weight
MIN.
-
-
-
-
-
-
-
-
-
-
-
-
10
-
TYP.
-
-
-
-
-
-
450
200
100
3.5
-
-
-
340
MAX. TEST CONDITIONS (Note 1)
4.8 IFM=1400A
2.32
1.77
140 di/dt = 1000A/µs
85 di/dt = 1000A/µs, Tj=25°C
100 Rated VRRM
-
300 IFM=1000A, tp=1000µs, di/dt=60A/µs,
- Vr=50V, 50% Chord.
-
0.033 Double side cooled
0.066 Single side cooled
20
-
UNITS
V
V
m
V
mA
µC
µC
A
µs
K/W
kN
g
Notes:-
1) Unless otherwise indicated Tj=150°C.
Introduction
The M0588LC400-450 fast recovery diode range has controlled reverse recovery characteristics.
Devices with a suffix code (2 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 M0588LC400 to M0588LC450 Issue 1
Page 2 of 11
November, 2001


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Soft Recovery Diode

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Notes on Ratings and Characteristics
1.0 Voltage Grade Table
Voltage Grade
40
42
44
45
VRRM
(V)
4000
4200
4400
4500
M0588LC400 to M0588LC450
VRSM
(V)
4100
4300
4500
4600
VR dc
(V)
2000
2040
2080
2100
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
Data Sheet. Types M0588LC400 to M0588LC450 Issue 1
Page 3 of 11
November, 2001


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Soft Recovery Diode

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5.0 Reverse Recovery Loss
M0588LC400 to M0588LC450
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
Data Sheet. Types M0588LC400 to M0588LC450 Issue 1
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November, 2001


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Soft Recovery Diode

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WESTCODE Positive development in power electronics
6.0 Computer Modelling Parameters
6.1 Device Dissipation Calculations
M0588LC400 to M0588LC450
I AV = − Vo +
Vo2 + 4 ff 2 rs WAV
2 ff 2 rs
Where Vo = 2.32 V, rs = 0.177m
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 Fig. 1 is represented in two ways;
(i) the well established V0 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 2.164756168
B -0.3369446
C 3.54133×10-4
D 0.1224153
Data Sheet. Types M0588LC400 to M0588LC450 Issue 1
Page 5 of 11
November, 2001


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