K0900E70 Datasheet, PDF (166/224 Pages) Teccor Electronics – Thyristor Product Catalog

AN1006
Application Notes
Procedure 3: (-) V_DRM and (-) 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_BO and I_BO
To measure the V_BO and I_BO parameter:
1. Set Variable Collector Supply Voltage Range to 1500 Max
Peak Volts. (2000 V on 370)
2. Set Horizontal knob to a sufficient scale to allow viewing of
trace at the required voltage level (50 V/DIV for 95 V to
215 V V_BO range devices and 100 V/DIV for devices having
V_BO ≥ 15 V).
3. Set Vertical knob to 50 µA/DIV.
4. Set Polarity to AC.
5. Set Mode to Norm.
6. Set Power Dissipation to 10 W.
7. Set Terminal Selector to Emitter Grounded-Open Base.
8. Set Left-Right Terminal Jack Selector to correspond with
location of test fixture.
Procedure 5: V_BO
To measure the V_BO parameter, increase Variable Collector
Supply Voltage until breakover occurs. (Figure AN1006.23) The
voltage at which current begins to flow and voltage on CRT does
not increase is the V_BO value.
VBO
+IBO
IBO
+VBO
PER
V
E
50
R
T
A
DIV
PER
H
O
R
50
I
V
Z
DIV
PER
S
T
E
P
()k
DIV
9m
PER
DIV
Figure AN1006.23 (+)V_BO = 100 V; (-)V_BO = 100 V; (±)I_BO < 10 µA
Procedure 6: I_BO
To measure the I_BO parameter, at the V_BO point, measure the
amount of device current just before the device reaches the
breakover mode. 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 the curve tracer.
Procedure 7: I_{H(Forward and Reverse)}
To measure the I_{H (Forward and Reverse)} parameter:
1. Set Variable Collector Supply Voltage Range to 1500 Max
Peak Volts (400 V on 577; 2000 V on 370).
2. Set Horizontal knob to a sufficient scale to allow viewing of
trace at the required voltage level (50 V/DIV for devices with
V_BO range from 95 V to 215 V and 100 V/DIV for devices
having V_BO ≥ 215 V).
3. Set Vertical knob to 20% of maximum holding current speci-
fied.
4. Set Polarity to AC.
5. Set Mode to Norm.
6. Set Power Dissipation to 220 W (100 W on 577).
7. Set Terminal Selector to Emitter Grounded-Open Base.
8. Set Left-Right Terminal Jack Selector to correspond with
the location of the test fixture.
WARNING: Limit test time to 15 seconds maximum.
9. Increase Variable Collector Supply Voltage until device
breaks over and turns on. (Figure AN1006.24)
IH
PER
V
E
20
R
T
mA
DIV
PER
H
O
R
50
I
V
Z
DIV
IH
PER
S
T
E
P
()k
DIV
9m
PER
DIV
Figure AN1006.24 I_H = 48 mA in both forward and reverse
directions
I_H is the vertical distance between the center horizontal axis and
the beginning of the line located on center vertical axis.
Procedure 8: V_{TM(Forward and Reverse)}
To measure the V_{TM (Forward and Reverse)} parameter:
1. Set Variable Collector Supply Voltage Range to 350 Max
Peak Volts. (400 V on 370)
2. Set Horizontal knob to 0.5 V/DIV.
3. Set Vertical knob to 0.5 A/DIV.
4. Set Polarity to (+).
5. Set Mode to Norm.
6. Set Power Dissipation to 220 W (100 W on 577).
7. Set Terminal Selector to Emitter Grounded-Open Base.
Before continuing with testing, note the following:
• 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.
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AN1006 - 14
©2002 Teccor Electronics
Thyristor Product Catalog