Q2004L31V
| Model | Q2004L31V |
| Description | Thyristor Product Catalog |
| PDF file | Total 224 pages (File size: 3M) |
| Chip Manufacturer | TECCOR |
Application Notes
AN1006
3. Repeat Procedure 16. (Figure AN1006.17)
PER
7. Set
Vertical
knob to ten times the maximum leakage current
(I
DRM
) specified for the device.
V
E
R
T
50
mA
VGT
DIV
Note: The CRT readout should show 1% of the maximum
leakage current. The vertical scale is divided by 1,000 when
the leakage mode is used.
PER
H
O
R
I
Z
DIV
Procedure 2: (+)V
DRM
and (+)I
DRM
To measure the (+)V
DRM
and (+)I
DRM
parameter:
500
mV
PER
S
T
E
P
1. Set
Left-Right Terminal Jack Selector
to correspond with
the 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 AN1006.18)
WARNING: Do NOT exceed V
DRM
/V
RRM
rating of SCRs, triacs,
or
Quadracs.
These devices can be damaged.
PER
()k
DIV
9m
PER
DIV
100m
Figure AN1006.17 V
GT
in Quadrant III = 820 mV
Procedure 19: V
GT
– Quadrant IV [MT2 (-) Gate (+)]
To measure the V
GT
– Quadrant IV parameter:
1. Set
Polarity
to (–).
2. Set
Step/Offset Polarity
by depressing
Invert
(release but-
ton on 577).
3. Set observed dot to top left corner of CRT grid by turning the
Horizontal
position knob. When testing is complete in Quad-
rant IV, return dot to original position.
4. Repeat Procedure 16.
V
E
R
T
DIV
50
nA
PER
H
O
R
I
Z
DIV
50
V
PER
S
T
E
P
Quadracs
Quadracs
are simply triacs with an internally-mounted diac. As
with triacs,
Quadracs
are bidirectional AC switches which are
gate controlled for either polarity of main terminal voltage.
To connect the
Quadrac:
1. Connect
Trigger
to
Base Terminal
(B).
2. Connect
MT1
to
Emitter Terminal
(E).
3. Connect
MT2
to
Collector Terminal
(C).
To begin testing, perform the following procedures.
VDRM
IDRM
()k
DIV
9m
PER
DIV
Figure AN1006.18 (+)I
DRM
= 51 nA at (+)V
DRM
= 400 V
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 screen).
Procedure 1: (+)V
DRM
, (+)I
DRM
, (-)V
DRM
, (-)I
DRM
Note: The (+) and (-) symbols are used to designate the polarity
of 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 or greater than the device’s V
DRM
rating).
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 300 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.
Procedure 4: V
BO
, I
BO
,
∆V
BO
(Quadrac Trigger Diac or Discrete Diac)
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.
To measure the V
BO
, I
BO
, and
∆V
BO
parameter:
1. Set
Variable Collector Supply Voltage Range
to
75 Max
Peak Volts.(80 V
on 370)
2. Set
Horizontal
knob to
10 V/DIV.
3. Set
Vertical
knob to
50 µA/DIV.
4. Set
Polarity
to
AC.
5. Set
Mode
to
Norm.
6. Set
Power Dissipation
to
0.5 W.
(0.4
W
on 370)
©2002 Teccor Electronics
Thyristor Product Catalog
AN1006 - 11
http://www.teccor.com
+1 972-580-7777
