Q2004P31V
| Model | Q2004P31V |
| Description | Thyristor Product Catalog |
| PDF file | Total 224 pages (File size: 3M) |
| Chip Manufacturer | TECCOR |
AN1006
Application Notes
6. Set
Rate
by depressing
Norm.
7. Set
Step Family
by depressing
Rep
(repetitive).
8. Set
Mode
to
DC.
9. Set
Horizontal
knob to
0.5 V/DIV.
10. Set
Power Dissipation
to
220 W
(100
W
on 577).
11. Set
Number of Steps
to
1.
(Set steps to
0
(zero) on 370.)
12. Set
Vertical
knob to a sufficient setting to allow the viewing
of 2 times the I
T(RMS)
rating of the device (I
T(peak)
) on CRT.
Before continuing with testing, note the following:
(1) Due to the excessive amount of power that can be
generated in this test, only parts with an I
T(RMS)
rating
of 6 A or less should be tested on standard curve
tracer. If testing devices above 6 A, a Tektronix model
176 high-current module is required.
(2) A Kelvin test fixture is required for this test. If a
Kelvin fixture is not used, an error in measurement of
V
TM
will result due to voltage drop in the fixture. If a
Kelvin fixture is not available, Figure AN1006.3 shows
necessary information to wire a test fixture with
Kelvin connectors.
13. Set
Left-Right Terminal Jack Selector
to correspond with
the location of the test fixture.
14. Increase
Variable Collector Supply Voltage
until current
reaches rated I
T(peak)
, which is twice the I
T(RMS)
rating of the-
SCR under test.
Note: Model 370 current is limited to 10 A.
WARNING: Limit test time to 15 seconds maximum after the
Variable Collector Supply
has been set to I
T(peak)
, After the
Variable Collector Supply Voltage
has been set to I
T(peak)
, the
test time can automatically be shortened by changing
Step
Family
from repetitive to single by depressing the
Single
button.
To measure V
TM
, follow along horizontal scale to the point where
the trace crosses the I
T(peak)
value. The distance from the left-
hand side of scale to the intersection point is the V
TM
value.
(Figure AN1006.7)
PER
3. Set
Max Peak Volts
to
75 V.
(80 V on 370)
4. Set
Mode
to
DC.
5. Set
Horizontal
knob to
Step Generator.
6. Set
Vertical
knob to approximately 10 percent of the maxi-
mum I
H
specified.
Note: Due to large variation of holding current values, the
scale may have to be adjusted to observe holding current.
7. Set
Number of Steps
to
1.
8. Set
Offset
by depressing
0
(zero). (Press
Aid
and
Oppose
at
the same time on 370.)
9. Set
Step/Offset Amplitude
to twice the maximum I
GT
of the
device.
10. Set
Terminal Selector
to
Step Generator-Emitter Grounded.
11. Set
Step Family
by depressing
Single.
12. Set
Left-Right Terminal Jack Selector
to correspond with
location of test fixture.
13. Increase
Variable Collector Supply Voltage
to maximum
position (100).
14. Set
Step Family
by depressing
Single.
(This could possibly
cause the dot on CRT to disappear, depending on the verti-
cal scale selected.)
15. Change
Terminal Selector
from
Step Generator-Emitter
Grounded
to
Open Base-Emitter Grounded.
16. Decrease
Variable Collector Supply Voltage
to the point
where the line on the CRT changes to a dot. The position of
the beginning point of the line, just before the line becomes a
dot, represents the holding current value. (Figure AN1006.8)
PER
V
E
R
T
DIV
500
A
PER
H
O
R
I
Z
DIV
PER
S
T
E
P
V
E
R
T
DIV
2
A
IH
Figure AN1006.8
I
H
= 1.2 mA
VTM
PER
()k
DIV
9m
PER
DIV
H
O
R
I
Z
DIV
500
mV
PER
Procedure 6: I
GT
and V
GT
100
mA
IPK
S
T
E
P
To measure the I
GT
and V
GT
parameter:
1. Set
Polarity
to (+).
2. Set
Number of Steps
to
1.
3. Set
Offset
by depressing
Aid.
4. Set
Offset Multiplier
to
0
(zero). (Press
Aid
and
Oppose
at
the same time on 370.)
5. Set
Terminal Selector
to
Step Generator-Emitter Grounded.
6. Set
Mode
to
Norm.
7. Set
Max Peak Volts
to
15 V.
(16
V
on 370)
()k
DIV
9m
PER
DIV
20
Figure AN1006.7
V
TM
= 1.15 V at I
T(peak)
= 12 A
Procedure 5: I
H
To measure the I
H
parameter:
1. Set
Polarity
to
(+).
2. Set
Power Dissipation
to
2.2 W.
(2
W
on 370)
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AN1006 - 6
©2002 Teccor Electronics
Thyristor Product Catalog
