FODM3053 Datasheet, PDF (4/8 Pages) Fairchild Semiconductor – 4-PIN FULL PITCH MINI-FLAT PACKAGE RANDOM PHASE TRIAC DRIVER OUTPUT OPTOCOUPLERS

FODM3051
4-PIN FULL PITCH MINI-FLAT PACKAGE
RANDOM PHASE TRIAC DRIVER
OUTPUT OPTOCOUPLERS
FODM3052
FODM3053
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
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 established by
triggering the D.U.T. with a normal LED input current, then
removing the current. The variable 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.
APPLIED VOLTAGE
WAVEFORM
252 V
0 VOLTS
τ_RC
V_max = 400 V
dv/dt =
0.63 Vmax
τ_RC
=
252
τ_RC
Figure 8. Static dv/dt Test Circuit
© 2003 Fairchild Semiconductor Corporation
Page 4 of 8
11/10/03