K1050S70
| Model | K1050S70 |
| Description | Thyristor Product Catalog |
| PDF file | Total 224 pages (File size: 3M) |
| Chip Manufacturer | TECCOR |
Application Notes
AN1006
To continue testing, perform the following procedures.
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)
7. Set
Terminal Selector
to
Emitter Grounded-Open Base.
Procedure 9: V
TM(Forward)
To measure the V
TM (Forward)
parameter:
1. Set
Left-Right Terminal Jack Selector
to correspond with
the location of the test fixture.
2. Increase
Variable Collector Supply Voltage
until current
reaches rated I
T(peak)
, which is 1.4 times the I
T(RMS)
rating of
the sidac.
Note: Model 370 current is limited. Set to 400 mA. Check for
1.1 V MAX.
WARNING: Limit test time to 15 seconds.
3. To measure V
TM
, follow along horizontal scale to the point
where the trace crosses the I
T(peak)
value. This horizontal dis-
tance is the V
TM
value. (Figure AN1006.25)
PER
Procedure 2: V
BO
To measure the V
BO
parameter:
1. Set
Left-Right Terminal Jack Selector
to correspond with
the location of the test fixture.
2. Set
Variable Collector Supply Voltage
to
55 V
(65
V
for
370) and apply voltage to device under test (D.U.T.), using
Left-Right-Selector Switch.
The peak voltage at which cur-
rent begins to flow is the V
BO
value. (Figure AN1006.26)
PER
V
E
R
T
DIV
500
mA
V
E
R
T
DIV
50
A
+IBO
500
mV
PER
PER
H
O
R
I
Z
DIV
H
O
R
I
Z
DIV
10
V
PER
VTM
PER
S
T
E
P
IBO
VBO
+VBO
S
T
E
P
IPK
()k
DIV
9m
PER
DIV
()k
DIV
9m
PER
DIV
Figure AN1006.25 V
TM (Forward)
= 950 mV at I
PK
= 1.4 A
Figure AN1006.26 (+)V
BO
= 35 V; (-)V
BO
= 36 V; (±)I
BO
< 15 µA;
(-)I
BO
< 10 µA and Cannot Be Read Easily
Procedure 10: V
TM(Reverse)
To measure the V
TM (Reverse)
parameter:
1. Set
Polarity
to (–).
2. Repeat Procedure 8 to measure V
TM(Reverse)
.
Procedure 3: 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.
Diacs
Diacs are voltage breakdown switches used to trigger-on triacs
and non-sensitive SCRs in phase control circuits.
Note: Diacs are bi-directional devices and can be connected in
either direction.
To connect the diac:
1. Connect one side of the diac to the
Collector Terminal
(C).
2. Connect other side of the diac to the
Emitter Terminal
(E).
To begin testing, perform the following procedures.
Procedure 4:
∆V
BO(Voltage Breakover Symmetry)
To measure the
∆V
BO (Voltage Breakover Symmetry)
parameter:
1. Measure positive and negative values of V
BO
as shown in
Figure AN1006.26.
2. Subtract the absolute value of V
BO
(-) from V
BO
(+).
The absolute value of the result is:
∆V
BO
= [ I +V
BO
I - I -V
BO
I ]
Procedure 1: Curve Tracer Setup
To set the curve tracer and begin testing:
1. Set
Variable Collector Supply Voltage Range
to
75 Max
Peak Volts.
(80
V
on 370)
2. Set
Horizontal
knob to sufficient scale to allow viewing of
trace at the required voltage level (10
V to 20 V/DIV
depend-
ing on device being tested).
©2002 Teccor Electronics
Thyristor Product Catalog
AN1006 - 15
http://www.teccor.com
+1 972-580-7777
