FODM3053V Datasheet, PDF (4/8 Pages) Fairchild Semiconductor – 4-Pin Full Pitch Mini-Flat Package Random Phase Triac Driver Output Optocouplers

800
T_A = 25°C
600
Fig. 7 On-State Characteristics
400
200
0
-200
-400
-600
-800
-6
-4
-2
0
2
4
6
V_TM - ON-STATE VOLTAGE (V)
400V
Vdc
PULSE
INPUT
R_TEST
MERCURY
WETTED
RELAY
APPLIED VOLTAGE
WAVEFORM
252 V
0 VOLTS
τ_RC
C_TEST
R = 10 kΩ
D.U.T.
X100
SCOPE
PROBE
1. The mercury wetted relay provides a high speed
repeated pulse to the D.U.T.
2. 100x scope probes are used, to allow high speeds
and voltages.
3. The worst-case condition for static dv/dt is estab-
lished by triggering the D.U.T. with a normal LED
input current, then removing the current. The vari-
able R_TEST allows the dv/dt to be gradually
increased until the D.U.T. continues to trigger in
response to the applied voltage pulse, even after
the LED current has been removed. The dv/dt is
then decreased until the D.U.T. stops triggering.
τ_RC is measured at this point and recorded.
V_max = 400 V
dv/dt =
0.63 Vmax
τ_RC
=
252
τ_RC
Figure 8. Static dv/dt Test Circuit
4
FODM3051, FODM3052, FODM3053 Rev. 1.0.0
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