WESTCODE
Absolute Maximum Ratings
VOLTAGE RATINGS
V
DRM
V
DSM
V
RRM
V
RSM
Repetitive peak off-state voltage, (note 1)
Non-repetitive peak off-state voltage, (note 1)
Repetitive peak reverse voltage, (note 1)
Non-repetitive peak reverse voltage, (note 1)
Date:- 9 Dec, 1999
Rat. Rep:- 99T16
Issue:- 1
Fast Turn-off Thyristor
Types P480CH20 to P480CH32
MAXIMUM
LIMITS
2000-3200
2000-3200
2000-3200
2100-3300
UNITS
V
V
V
V
OTHER RATINGS
I
T(AV)
I
T(AV)
I
T(AV)
I
T(RMS)
I
T(d.c.)
I
TSM
I
TSM2
2
It
2
It
di
T
/dt
V
RGM
P
G(AV)
P
GM
V
GD
T
HS
T
stg
Mean on-state current, T
sink
=55°C, (note 2)
Mean on-state current. T
sink
=85°C, (note 2)
Mean on-state current. T
sink
=85°C, (note 3)
Nominal RMS on-state current, 25°C, (note 2)
D.C. on-state current, 25°C, (note 4)
Peak non-repetitive surge t
p
=10ms, V
RM
=0.6V
RRM
, (note 5)
Peak non-repetitive surge t
p
=10ms, V
RM
≤10V,
(note 5)
2
I t capacity for fusing t
p
=10ms, V
RM
=0.6V
RRM
, (note 5)
2
I t capacity for fusing t
p
=10ms, V
RM
≤10V,
(note 5)
Maximum rate of rise of on-state current (repetitive), (Note 6)
Maximum rate of rise of on-state current (non-repetitive), (Note 6)
Peak reverse gate voltage
Mean forward gate power
Peak forward gate power
Non-trigger gate voltage, (Note 7)
Operating temperature range
Storage temperature range
MAXIMUM
LIMITS
1115
770
470
2200
1180
10.65
11.7
3
567×10
3
686×10
300
600
5
4
30
0.25
-40 to +125
-40 to +150
UNITS
A
A
A
A
A
kA
kA
2
As
2
As
A/µs
A/µs
V
W
W
V
°C
°C
Notes:-
1)
De-rating factor of 0.13% per °C is applicable for T
j
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 T
j
initial.
6)
V
D
=67% V
DRM
, I
FG
=2A, t
r
≤0.5µs,
T
case
=125°C.
7)
Rated V
DRM
.
Types P480CH20 to P480CH32. Rating Report 99T16 Issue 1
Page 1 of 13
December, 1999
WESTCODE
Positive development in power electronics
Characteristics
P480CH20 to P480CH32
PARAMETER
V
TM
V
0
r
S
Maximum peak on-state voltage
Threshold voltage
MIN.
-
-
-
-
-
-
-
-
-
-
-
TYP.
-
-
-
-
-
-
-
-
-
800
-
-
-
-
-
510
MAX. TEST CONDITIONS
(Note 1)
1.87
1.144
0.53
200
150
150
3.0
300
1000
-
300
400
0.024
0.048
26
-
V
D
=80% V
DRM
Rated V
DRM
Rated V
RRM
T
j
=25°C
T
j
=25°C.
T
j
=25°C
I
TM
=1000A, t
p
=1000µs, di/dt=60A/µs,
V
R
=50V
I
TM
=1000A, t
p
=1000µs, di/dt=60A/µs,
V
R
=50V, V
DR
=80%V
DRM
, dV
DR
/dt=20V/µs
I
TM
=1000A, t
p
=1000µs, di/dt=60A/µs,
V
R
=50V, V
DR
=80%V
DRM
,
dV
DR
/dt=200V/µs
Double side cooled
Single side cooled
V
D
=10V, I
T
=3A
I
TM
=1400A
UNITS
V
V
mΩ
V/µs
mA
mA
V
mA
mA
µC
µs
µs
°C/W
°C/W
kN
g
Slope resistance
Critical rate of rise of off-state
dv/dt
voltage
I
DRM
Peak off-state current
I
RRM
V
GT
I
GT
I
H
Q
RA
Peak reverse current
Gate trigger voltage
Gate trigger current
Holding current
Recovered charge, 50% Chord
t
q
Turn-off time
-
R
θ
F
W
t
Thermal resistance, junction to
heatsink
Mounting force
Weight
-
-
19
-
Notes:-
1)
Unless otherwise indicated T
j
=125
°
C.
Types P480CH20 to P480CH32. Rating Report 99T16 Issue 1
Page 2 of 13
December, 1999
WESTCODE
Positive development in power electronics
Notes on Ratings and Characteristics
1.0 Voltage Grade Table
Voltage Grade 'H'
20
22
24
26
28
30
32
V
DRM
V
DSM
V
RRM
V
2000
2200
2400
2600
2800
3000
3200
V
RSM
V
2100
2300
2500
2700
2900
3100
3300
P480CH20 to P480CH32
V
D
V
R
DC V
1250
1350
1450
1550
1650
1750
1800
2.0 Extension of Voltage Grades
This report is applicable to other and higher voltage grades when supply has been agreed by
Sales/Production.
3.0 Extension of Turn-off Time
This Report is applicable to other t
q
/re-applied dv/dt combinations when supply has been agreed by
Sales/Production.
4.0 Repetitive dv/dt
Higher dv/dt selections are available up to 1000V/µs on request.
5.0 De-rating Factor
A blocking voltage de-rating factor of 0.13%/°C is applicable to this device for T
j
below 25 C.
6.0 Rate of rise of on-state current
The maximum un-primed rate of rise of on-state current must not exceed 600A/µs at any time during turn-
on on a non-repetitive basis. For repetitive performance the on-state rate of rise of current must not
exceed 300 A/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 Square wave ratings
These ratings are given for load component rate of rise of forward current of 100 and 500 A/µs.
8.0 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.
9.0 Maximum Operating Frequency
The maximum operating frequency is set by the on-state duty, the time required for the thyristor to turn off
(t
q
) and for the off-state voltage to reach full value (t
v
), i.e.
o
f
max
=
1
t
pulse
+
t
q
+
t
v
Types P480CH20 to P480CH32. Rating Report 99T16 Issue 1
Page 3 of 13
December, 1999
WESTCODE
Positive development in power electronics
10.0 On-State Energy per Pulse Characteristics
P480CH20 to P480CH32
These curves enable rapid estimation of device dissipation to be obtained for conditions not covered by
the frequency ratings.
Let E
p
be the Energy per pulse for a given current and pulse width, in joules
Let R
th(J-Hs)
be the steady-state d.c. thermal resistance (junction to sink)
and T
SINK
be the heat sink temperature.
Then the average dissipation will be:
W
AV
=
E
P
⋅
f and T
SINK
(max .)
=
125
−
(
W
AV
⋅
R
th
(
J
−
Hs
)
)
11.0 Reverse recovery ratings
(i) Q
RA
is based on 50% I
RM
chord as shown in Fig. 1 below.
Fig. 1
(ii) Q
RR
is based on a 150µs integration time.
150
µ
s
i.e.
Q
RR
=
∫
i
0
RR
.
dt
(iii)
12.0 Reverse Recovery Loss
t
1
K Factor
=
t
2
12.1 Determination by Measurement
From waveforms of recovery current obtained from a high frequency shunt (see Note 1, Page 5) 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 heat sink temperature can
then be evaluated from:
T
SINK
(
new
)
=
T
SINK
(
original
)
−
E
⋅
(
k
+
f
⋅
R
th
(
J
−
Hs
)
)
where k = 0.227 (°C/W)/s
E = Area under reverse loss waveform per pulse in joules (W.s.)
f = rated frequency Hz at the original heat sink temperature.
R
th(J-Hs)
= d.c. thermal resistance (°C/W).
Types P480CH20 to P480CH32. Rating Report 99T16 Issue 1
Page 4 of 13
December, 1999
WESTCODE
Positive development in power electronics
The total dissipation is now given by:
P480CH20 to P480CH32
W
(TOT)
=
W
(original)
+
E
⋅
f
12.2 Determination without Measurement
In circumstances where it is not possible to measure voltage and current conditions, or for design
purposes, the additional losses E in joules may be estimated as follows.
Let E be the value of energy per reverse cycle in joules (curves in Figure 9).
Let f be the operating frequency in Hz
T
SINK
(
new
)
=
T
SINK
(
original
)
−
(
E
⋅
R
th
⋅
f
)
where T
SINK (new)
is the required maximum heat sink temperature and
T
SINK (original)
is the heat sink temperature given with the frequency ratings.
A suitable R-C snubber network is connected across the thyristor to restrict the transient reverse voltage
waveform to a peak value (V
RM
) of 67% of the maximum grade. If a different grade is being used or V
RM
is
other than 67% of Grade, the reverse loss may be approximated by a pro rata adjustment of the maximum
value obtained from the curves.
NOTE 1-
Reverse Recovery Loss by Measurement
This thyristor has a low reverse recovered charge and peak reverse recovery current. When measuring
the charge care must be taken to ensure that:
(a) a.c. 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:
V
R
R
=
4
⋅
C
S
⋅
di dt
2
Where: V
R
= Commutating source voltage
C
S
= Snubber capacitance
R = Snubber resistance
13.0 Gate Drive
The recommended pulse gate drive is 20V, 10Ω with a short-circuit current rise time of not more than
0.5µs. This gate drive must be applied when using the full di/dt capability of the device.
The duration of pulse may need to be configured with respect to the application but should be no shorter
than 20µs, otherwise an increase in pulse current could be needed to supply the resulting increase in
charge to trigger.
Types P480CH20 to P480CH32. Rating Report 99T16 Issue 1
Page 5 of 13
December, 1999
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