R3708FC42X Datasheet PDF - IXYS
| Part Number | R3708FC42X | |
| Description | Distributed Gate Asymmetric Thyristor | |
| Manufacturers | IXYS | |
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WESTCODE
An IXYS Company
Date:- 17 Oct, 2007
Data Sheet Issue:- 4
Distributed Gate Asymmetric Thyristor
Type R3708FC40# to R3708FC45#
(Old Type Number: R1386CH40-45)
Absolute Maximum Ratings
VDRM
VDSM
VRRM
VRSM
VOLTAGE RATINGS
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)
MAXIMUM
LIMITS
4000-4500
4000-4500
2500-3000
2600-3100
UNITS
V
V
V
V
OTHER RATINGS
IT(AV)M
IT(AV)M
IT(AV)M
IT(RMS)
IT(d.c.)
ITSM
ITSM2
I2t
I2t
(di/dt)cr
VRGM
PG(AV)
PGM
Tj op
Tstg
Maximum average on-state current, Tsink=55°C, (note 2)
Maximum average on-state current. Tsink=85°C, (note 2)
Maximum average on-state current. Tsink=85°C, (note 3)
Nominal RMS on-state current, Tsink=25°C, (note 2)
D.C. on-state current, Tsink=25°C, (note 4)
Peak non-repetitive surge tp=10ms, Vrm=60%VRRM, (note 5)
Peak non-repetitive surge tp=10ms, Vrm≤10V, (note 5)
I2t capacity for fusing tp=10ms, Vrm=60%VRRM, (note 5)
I2t capacity for fusing tp=10ms, Vrm≤10V, (note 5)
Single Shot
Critical rate of rise of on-state current (note 6) Repetitive (50Hz, 60s)
Continuous (50Hz)
Peak reverse gate voltage
Mean forward gate power
Peak forward gate power
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.
6) VD=67% VDRM, IFG=2A, tr≤0.5µs, Tcase=125°C.
MAXIMUM
LIMITS
3708
2516
1498
7364
6275
50
55
12.50×106
15.13×106
1000
500
250
5
4
50
-40 to +125
-40 to +150
UNITS
A
A
A
A
A
A
A
A2s
A2s
A/µs
V
W
W
°C
°C
Data Sheet. Types R3708FC40# to R3708FC45# Issue 4
Page 1 of 12
October, 2007
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WESTCODE An IXYS Company
Distributed Gate Thyristor Types R3708FC40# to R3708FC45#
15.0 Reverse Recovery Loss
15.1 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 the following:
( )TK (new) = TK (original ) − E ⋅ k + f ⋅ RthJK
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.
RthJK = d.c. thermal resistance (°C/W).
The total dissipation is now given by:
W (TOT) = W (original) + E ⋅ f
15.2 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
( )TK (new) = TK (original ) − E ⋅ Rth ⋅ f
Where TK (new) is the required maximum heat sink temperature and
TK (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
to a peak value (Vrm) of 67% of the maximum grade. If a different grade is being used or Vrm 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:
R2
=
4⋅
Vr
CS ⋅ di dt
Vr = Commutating source voltage
Where: CS = Snubber capacitance
R = Snubber resistance
Data Sheet. Types R3708FC40# to R3708FC45# Issue 4
Page 5 of 12
October, 2007
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for R3708FC42X electronic component. |
| Information | Total 12 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ R3708FC42X.PDF Datasheet ] | |
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