Q2004L31V
| Model | Q2004L31V |
| Description | Thyristor Product Catalog |
| PDF file | Total 224 pages (File size: 3M) |
| Chip Manufacturer | TECCOR |
Application Notes
AN1006
Procedure 11: I
H(Forward and Reverse)
For these steps, it is again necessary to connect the
Trigger
to
MT2
through a 10
Ω
resistor. The other connections remain the
same.
To measure the I
H (Forward and Reverse)
parameter:
1. Set
Power Dissipation
to
50 W.
2. Set
Max Peak Volts
to
75 V.
(80
V
on 370)
3. Set
Mode
to
DC.
4. Set
Horizontal
knob to
5 V/DIV.
5. Set
Vertical
knob to approximately 10% of the maximum I
H
specified.
Note: Due to large variations of holding current values, the
scale may have to be adjusted to observe holding current.
6. Set
Terminal Selector
to
Emitter Grounded-Open Base.
Sidacs
The sidac is a bidirectional voltage-triggered switch. Upon appli-
cation of a voltage exceeding the sidac breakover voltage point,
the sidac switches on through a negative resistance region (simi-
lar to a diac) to a low on-state voltage. Conduction continues until
current is interrupted or drops below minimum required holding
current.
To connect the sidac:
1. Connect
MT1
to the
Emitter Terminal
(E).
2. 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
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
1500 Max
Peak Volts.
2. Set
Horizontal
knob to
50 V/DIV.
3. Set
Mode
to
Leakage.
4. Set
Polarity
to (+).
5. Set
Power Dissipation
to
2.2 W.
(2
W
on 370)
6. Set
Terminal Selector
to
Emitter Grounded-Open Base.
7. Set
Vertical
knob to
50 µA/DIV.
(Due to leakage mode, the
CRT readout will show 50 nA.)
Procedure 12: I
H(Forward)
To measure the I
H (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
to maximum
position (100).
Note: Depending on the vertical scale being used, the dot
may disappear completely from the screen.
4. Decrease
Variable Collector Supply Voltage
to the point
where the line on the CRT changes to a dot. The position of
the beginning point of the line, just before the line changes to
a dot, represents the I
H
value. (Figure AN1006.21)
PER
Procedure 2: (+)V
DRM
and (+)I
DRM
To measure the (+)V
DRM
and (+)I
DRM
parameter:
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 AN1006.22)
PER
V
E
R
T
DIV
5
mA
PER
H
O
R
I
Z
DIV
5
V
PER
S
T
E
P
IH
()k
DIV
9m
PER
DIV
V
E
R
T
DIV
50
nA
PER
Figure AN1006.21 I
H (Forward)
= 18 mA
H
O
R
I
Z
DIV
50
V
Procedure 13: I
H(Reverse)
To measure the I
H (Reverse)
parameter:
1. Set
Polarity
to (–).
2. Continue testing per Procedure 12 for measuring I
H (Reverse)
.
PER
S
T
E
P
VDRM
IDRM
Figure AN1006.22 I
DRM
= 50 nA at V
DRM
= 90 V
()k
DIV
9m
PER
DIV
©2002 Teccor Electronics
Thyristor Product Catalog
AN1006 - 13
http://www.teccor.com
+1 972-580-7777
