K0900E70 Datasheet, PDF (160/224 Pages) Teccor Electronics – Thyristor Product Catalog

AN1006
Application Notes
Procedure 2: (+)V_DRM, (+)I_DRM
To measure the (+)V_DRM and (+)I_DRM parameter:
1. Set Left-Right Terminal Jack Selector to correspond with
location of the test fixture.
2. Increase Variable Collector Supply Voltage to the rated
V_DRM of the device and observe the dot on the CRT. Read
across horizontally from the dot to the vertical current scale.
This measured value is the leakage current.
(Figure AN1006.11)
PER
V
E
50
R
T
nA
DIV
PER
H
O
R
100
I
V
Z
DIV
PER
S
VDRM
T
E
P
IDRM
()k
DIV
9m
PER
DIV
Figure AN1006.11 (+)I_DRM = 205 nA at (+)V_DRM = 600 V
Procedure 3: (-)V_DRM, (-)I_DRM
To measure the (-)V_DRM and (-)I_DRM parameter:
1. Set Polarity to (–).
2. Repeat Procedures 1 and 2. (Read measurements from
upper right corner of the screen.)
Procedure 4: V_{TM (Forward and Reverse)}
To measure the V_{TM (Forward and Reverse)} parameter:
1. Set Terminal Selector to Step Generator-Emitter Grounded.
2. Set Step/Offset Amplitude to twice the maximum I_GT rating
of the device (to insure the device turns on).
3. Set Variable Collector Supply Voltage Range to 15 V Max
Peak volts. (16 V on 370)
4. Set Offset by depressing 0 (zero).
5. Set Rate by depressing Norm.
6. Set Step Family by depressing Rep (Repetitive).
7. Set Mode to Norm.
8. Set Horizontal knob to 0.5 V/DIV.
9. Set Power Dissipation to 220 W (100 W on 577).
10. Set Number of Steps to 1.
11. Set Step/Offset Polarity to non-inverted (button extended;
on 577 button depressed).
12. 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 CRT].
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.
• 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.
Procedure 5: V_{TM (Forward)}
To measure the V_{TM (Forward)} parameter:
1. Set Polarity to (+).
2. Set Left-Right Terminal Jack Selector to correspond with
location of test fixture.
3. Increase Variable Collector Supply Voltage until current
reaches rated I_T(peak), which is 1.4 times 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. After
the Variable Collector Supply Voltage has been set to I_T(peak),
the test time can automatically be set to a short test time by
changing Step Family from repetitive to single by depress-
ing 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 crossing point is the V_TM value.
(Figure AN1006.12)
VTM
IPK
PER
V
E
2
R
T
A
DIV
PER
H
O
R
500
I
mV
Z
DIV
PER
S 100
T
E
mA
P
()k
DIV
9m
20
PER
DIV
Figure AN1006.12 V_{TM (forward)} = 1.1 V at I_PK = 11.3 A (8 A rms)
Procedure 6: 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) similar to Figure AN1006.12, except from
upper right hand corner of screen.
Procedure 7: I_{H(Forward and Reverse)}
To measure the I_{H (Forward and Reverse)} parameter:
1. Set Step/Offset Amplitude to twice the I_GT rating of the
device.
2. Set Power Dissipation to 10 W.
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AN1006 - 8
©2002 Teccor Electronics
Thyristor Product Catalog