Q2004LTH52V
| Model | Q2004LTH52V |
| Description | Thyristor Product Catalog |
| PDF file | Total 224 pages (File size: 3M) |
| Chip Manufacturer | TECCOR |
AN1006
Application Notes
7. Set
Terminal Selector
to
Emitter Grounded-Open Base.
•
Procedure 5: V
BO (Positive and Negative)
To measure the V
BO (Positive and Negative)
parameter:
1. Set
Left-Right Terminal Jack Selector
to correspond with
the location of the test fixture.
2. Set
Variable Collector Supply Voltage
to
55 V
(65
V
on
370) and apply voltage to the device under test (D.U.T.)
using the
Left Hand Selector Switch.
The peak voltage at
which current begins to flow is the V
BO
value.
(Figure AN1006.19)
PER
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 volt-
age drop in fixture. If a Kelvin fixture is not available,
Figure AN1006.3 shows necessary information to wire a test
fixture with Kelvin connections.
To measure the V
TM (Forward and Reverse)
parameter:
1. Set
Terminal Selector
to
Emitter Grounded-Open Base.
2. Set
Max Peak Volts
to
75 V.
(80
V
on 370)
3. Set
Mode
to
Norm.
4. Set
Horizontal
knob to
0.5 V/DIV.
5. Set
Power Dissipation
to
220 watts
(100
watts
on a 577).
6. Set
Vertical
knob to a sufficient setting to allow the viewing
of 1.4 times the I
T(RMS)
rating of the device I
T(peak)
on the CRT.
V
E
R
T
DIV
50
A
VBO
+IBO
PER
H
O
R
I
Z
DIV
Procedure 9: V
TM(Forward)
10
V
To measure the V
TM (Forward)
parameter:
1. Set
Polarity
to (+).
2. Set
Left-Right Terminal Jack Selector
to correspond with
the location of the test fixture.
3. Increase
Variable Collector Supply Voltage
until current
reaches rated I
T(peak)
, which is 1.4 times the I
T(RMS)
rating of
the triac under test.
Note: Model 370 current is limited to 10 A.
WARNING: Limit test time to 15 seconds maximum.
4. To measure V
TM
, follow along horizontal scale to the point
where the trace crosses the I
T(peak)
value. This horizontal dis-
tance is the V
TM
value. (Figure AN1006.20)
PER
PER
IBO
+VBO
S
T
E
P
()k
DIV
9m
PER
DIV
Figure AN1006.19 (+)V
BO
= 35 V; (-)V
BO
= 36 V; (±)I
BO
< 10 A
Procedure 6: I
BO (Positive and Negative)
To measure the I
BO (Positive and Negative)
parameter, at the V
BO
point,
measure the amount of device current just before the device
reaches the breakover point. The measured current at this point
is the I
BO
value.
Note: If I
BO
is less than 10 µA, the current cannot readily be seen
on curve tracer.
V
E
R
T
DIV
1
A
Procedure 7:
∆V
BO (Voltage Breakover Symmetry)
To measure the
∆V
BO (Voltage Breakover Symmetry)
parameter:
1. Measure positive and negative V
BO
values per Procedure 5.
2. Subtract the absolute value of V
BO
(-) from V
BO
(+).
The absolute value of the result is:
∆V
BO
= [ I+V
BO
I - I -V
BO
I ]
VTM
PER
H
O
R
I
Z
DIV
500
mV
PER
IPK
S
T
E
P
()k
DIV
9m
PER
DIV
Procedure 8: V
TM (Forward and Reverse)
To test V
TM
, the
Quadrac
must be connected the same as when
testing V
BO
, I
BO
, and
∆V
BO
.
To connect the
Quadrac:
1. Connect
MT1
to
Emitter Terminal
(E).
2. Connect
MT2
to
Collector Terminal
(C).
3. Connect
Trigger Terminal
to
MT2 Terminal
through a 10
Ω
resistor.
Note the following:
•
Due to the excessive amount of power that can be generated in
this test, only parts with an I
T(RMS)
rating of 8 A or less should be
tested on standard curve tracer. If testing devices above 8 A, a
Tektronix model 176 high-current module is required.
Figure AN1006.20 V
TM (Forward)
= 1.1 V at I
PK
= 5.6 A
Procedure 10: V
TM(Reverse)
To measure the V
TM (Reverse)
parameter:
1. Set
Polarity
to (–).
2. Set
Left-Right Terminal Jack Selector
to correspond with
the location of the test fixture.
3. Increase
Variable Collector Supply Voltage
until current
reaches rated I
T(peak)
.
4. Measure V
TM(Reverse)
the same as in Procedure 8. (Read mea-
surements from upper right corner of screen).
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AN1006 - 12
©2002 Teccor Electronics
Thyristor Product Catalog
