K0900E70 Datasheet, PDF (159/224 Pages) Teccor Electronics – Thyristor Product Catalog

Application Notes
AN1006
8. Set Power Dissipation to 2.2 W. (2 W on 370) For sensitive
SCRs, set at 0.5 W. (0.4 W on 370)
9. Set Horizontal knob to 2 V/DIV.
10. Set Vertical knob to 50 mA/DIV.
11. Increase Variable Collector Supply Voltage until voltage
reaches 12 V on CRT.
12. After 12 V setting is completed, change Horizontal knob to
Step Generator.
Procedure 7: I_GT
To measure the I_GT parameter:
1. Set Step/Offset Amplitude to 20% of maximum rated I_GT.
Note: R_GK should be removed when testing I_GT.
2. Set Left-Right Terminal Jack Selector to correspond with
location of the test fixture.
3. Gradually increase Offset Multiplier until device reaches
the conduction point. (Figure AN1006.9) Measure I_GT by fol-
lowing horizontal axis to the point where the vertical line
crosses axis. This measured value is I_GT. (On 370, I_GT will be
numerically displayed on screen under offset value.)
PER
V
E
50
R
T
mA
DIV
PER
H
O
R
I
Z
DIV
IGT
PER
S
10
T
E
A
P
()k
DIV
9m
5K
PER
DIV
Figure AN1006.9 I_GT = 25 µA
Procedure 8: V_GT
To measure the V_GT parameter:
1. Set Offset Multiplier to 0 (zero). (Press Aid and Oppose at
the same time on 370.)
2. Set Step Offset Amplitude to 20% rated V_GT.
3. Set Left-Right Terminal Jack Selector to correspond with
location of test fixture.
4. Gradually increase Offset Multiplier until device reaches
the conduction point. (Figure AN1006.10) Measure V_GT by
following horizontal axis to the point where the vertical line
crosses axis. This measured value is V_GT. (On 370, V_GT will
be numerically displayed on screen, under offset value.)
Procedure 9: _GT will be numerically displayed on screen
under offset value.)
VGT
Figure AN1006.10 V_GT = 580 mV
PER
V
E
50
R
T
mA
DIV
PER
H
O
R
I
Z
DIV
PER
S
T
200
E
mV
P
()k
DIV
9m
250m
PER
DIV
Triacs
Triacs are full-wave bidirectional AC switches turned on when
current is supplied to the gate terminal of the device. If gate con-
trol in all four quadrants is required, then a sensitive gate triac is
needed, whereas a standard triac can be used if gate control is
only required in Quadrants I through III.
To connect the triac:
1. Connect the Gate to the Base Terminal (B).
2. Connect MT1 to the Emitter Terminal (E).
3. Connect MT2 to the Collector Terminal (C).
To begin testing, perform the following procedures.
Procedure 1: (+)V_DRM, (+)I_DRM, (-)V_DRM, (-)I_DRM
Note: The (+) and (-) symbols are used to designate the polarity
MT2 with reference to MT1.
To measure the (+)V_DRM, (+)I_DRM, (-)V_DRM, and (-)I_DRM parameter:
1. Set Variable Collector Supply Voltage Range to appropri-
ate Max Peak Volts for device under test. (Value selected
should be equal to the device’s V_DRM rating.)
WARNING: Do NOT exceed V_DRM/V_RRM rating of SCRs, tri-
acs, or Quadracs. These devices can be damaged.
2. Set Horizontal knob to sufficient scale to allow viewing of
trace at the required voltage level. (The 100 V/DIV scale
should be used for testing devices having a V_DRM rating of
600 V or greater; the 50 V/DIV scale for testing parts rated
from 30 V to 500 V, and so on.)
3. Set Mode to Leakage.
4. Set Polarity to (+).
5. Set Power Dissipation to 0.5 W. (0.4 W on 370)
6. Set Terminal Selector to Emitter Grounded-Open Base.
7. Set Vertical knob to ten times the maximum leakage current
(I_DRM) specified for the device.
Note: The CRT screen readout should show 1% of the maxi-
mum leakage current. The vertical scale is divided by 1,000
when leakage mode is used.
©2002 Teccor Electronics
Thyristor Product Catalog
AN1006 - 7
http://www.teccor.com
[phone]