K0900E70 Datasheet, PDF (156/224 Pages) Teccor Electronics – Thyristor Product Catalog

AN1006
Application Notes
Power Rectifiers
The rectifier is a unidirectional device which conducts when for-
ward voltage (above 0.7 V) is applied.
To connect the rectifier:
1. Connect Anode to Collector Terminal (C).
2. Connect Cathode to Emitter Terminal (E).
To begin testing, perform the following procedures.
Procedure 1: V_RRM and I_RM
To measure the V_RRM and I_RM parameter:
1. Set Variable Collector Supply Voltage Range to 1500 V.
(2000 V on 370)
2. Set Horizontal knob to sufficient scale to allow viewing of
trace at the required voltage level (100 V/DIV for 400 V and
600 V devices and 50 V/DIV for 200 V devices).
3. Set Mode to Leakage.
4. Set Vertical knob to 100 µA/DIV. (Due to leakage setting, the
CRT readout will be 100 nA per division.)
5. Set Terminal Selector to Emitter Grounded-Open Base.
6. Set Polarity to (–).
7. Set Power Dissipation to 2.2 W. (2 W on 370)
8. Set Left-Right Terminal Jack Selector to correspond with
location of test fixture.
9. Increase Variable Collector Supply Voltage to the rated
V_RRM 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 AN1006.2)
IRM
VRRM
PER
V
E
100
R
T
nA
DIV
PER
H
O
R
100
I
V
Z
DIV
PER
S
T
E
P
()k
DIV
9m
PER
DIV
Figure AN1006.2 I_RM = 340 nA at V_RRM = 600 V
Procedure 2: V_FM
Before 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 VFM will result due to
voltage drop in fixture. If a Kelvin fixture is not available,
Figure AN1006.3 shows necessary information to wire a test
fixture with Kelvin connections.
• Due to the current limitations of standard curve tracer
model 576, V_FM cannot be tested at rated current without a Tek-
tronix model 176 high-current module. The procedure below is
done at I_T(RMS) = 10 A (20 A_PK). This test parameter allows the
use of a standard curve tracer and still provides an estimate of
whether V_FM is within specification.
SOCKET
One set of
pins wired to
Collector (C),
Base (B), and
Emitter (E)
Terminals
SOCKET PINS
Socket used
must have two
sets of pins
The pins which correspond to
the anode and cathode of the
device are wired to the terminals
marked C_SENSE (MT2/Anode) and
E_SENSE (MT1/Cathode). The gate
does not require a Kelvin
connection.
Figure AN1006.3 Instructions for Wiring Kelvin Socket
To measure the V_FM parameter:
1. Set Variable Collector Supply Voltage Range to 15 Max
Peak Volts. (16 V on 370)
2. Set Horizontal knob to 0.5 V/DIV.
3. Set Mode to Norm.
4. Set Vertical knob to 2 A/DIV.
5. Set Power Dissipation to 220 W (100 W on 577).
6. Set Polarity to (+).
7. Set Left-Right Terminal Jack Selector to correspond with
location of test fixture.
8. Increase Variable Collector Supply Voltage until current
reaches 20 A.
WARNING: Limit test time to 15 seconds maximum.
To measure V_FM, follow along horizontal scale to the point where
the trace crosses the 20 A axis. The distance from the left-hand
side of scale to the crossing point is the V_FM value.
(Figure AN1006.4)
Note: Model 370 current is limited to 10 A.
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AN1006 - 4
©2002 Teccor Electronics
Thyristor Product Catalog