MOC3031M Datasheet, PDF (6/11 Pages) Fairchild Semiconductor – 6-PIN DIP ZERO-CROSS OPTOISOLATORS TRIAC DRIVER OUTPUT (250/400 VOLT PEAK)

+250 for MOC303XM
+400 for MOC304XM
Vdc
PULSE
INPUT
R_TEST
MERCURY
WETTED
RELAY
C_TEST
R = 10 kΩ
D.U.T.
X100
SCOPE
PROBE
Figure 9. Static dv/dt Test Circuit
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 trigger-
ing 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 trig-
gering. τ_RC is measured at this point and recorded.
APPLIED VOLTAGE
WAVEFORM
158 V
V_max = 250 V
APPLIED VOLTAGE
WAVEFORM
252 V
V_max = 400 V
0 VOLTS
τ_RC
dv/dt =
0.63 Vmax
τ_RC
=
158
RC
0 VOLTS
τ_RC
dv/dt =
0.63 Vmax
τ _RC
=
252
τ RC
Figure 10. Static dv/dt Test Waveform
(MOC3031M, MOC3032M, MOC3033M)
Figure 11. Static dv/dt Test Waveform
(MOC3041M, MOC3042M, MOC3043M)
Typical circuit (Fig 12, 13) for use when hot line switching is required. In this circuit the “hot” side of the line is switched and the load
connected to the cold or neutral side. The load may be connected to either the neutral or hot line.
R_in is calculated so that I_F is equal to the rated I_FT of the part, 5 mA for the MOC3033M and MOC3043M, 10 mA for the MOC3032M
and MOC3042M, or 15 mA for the MOC3031M and MOC3041M. The 39 ohm resistor and 0.01 µF capacitor are for snubbing of the
triac and may or may not be necessary depending upon the particular triac and load used.
V_CC
R_in
1
6 180Ω
2
MOC3031M
5
MOC3032M
MOC3033M
3
4
1k
39Ω _*
0.01
HOT
V_CC
115 VAC
R_in
1
6 360Ω
2
MOC3041M
5
MOC3042M
MOC3043M
3
4
330
39Ω _*
0.01
HOT
240 VAC
LOAD
NEUTRAL
*^{For highly inductive loads (power factor < 0.5), change this value to 360 ohms.}
Figure 12. Hot-Line Switching Application Circuit
(MOC3031M, MOC3032M, MOC3033M)
LOAD
NEUTRAL
*^{For highly inductive loads (power factor < 0.5), change this value to 360 ohms.}
Figure 13. Hot-Line Switching Application Circuit
(MOC3041M, MOC3042M, MOC3043M)
6
MOC3031M, MOC3032M, MOC3033M, MOC3041M, MOC3042M, MOC3043M Rev. 1.0.1
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