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MOC3031VM View Datasheet(PDF) - Fairchild Semiconductor

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MOC3031VM Datasheet PDF : 12 Pages
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+250 for MOC303XM
+400 for MOC304XM
Vdc
PULSE
INPUT
RTEST
MERCURY
WETTED
RELAY
CTEST
R = 10 k
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
triggering the D.U.T. with a normal LED input current, then
removing the current. The variable RTEST 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. τRC is
measured at this point and recorded.
APPLIED VOLTAGE
WAVEFORM
158 V
Vmax = 250 V
APPLIED VOLTAGE
WAVEFORM
252 V
Vmax = 400 V
0 VOLTS
τRC
dv/dt =
0.63 Vmax
τRC
=
158
RC
0 VOLTS
τRC
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.
Rin is calculated so that IF is equal to the rated IFT of the part, 5mA for the MOC3033M and MOC3043M, 10mA for
the MOC3032M and MOC3042M, or 15mA for the MOC3031M and MOC3041M. The 39 ohm resistor and 0.01µF
capacitor are for snubbing of the triac and may or may not be necessary depending upon the particular triac and
load used.
VCC
Rin
1
6 180
2
MOC3031M
5
MOC3032M
MOC3033M
3
4
1k
39*
0.01
HOT
VCC
115 VAC
Rin
1
6 360
2
MOC3041M
5
MOC3042M
MOC3043M
3
4
330
39*
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)
©2005 Fairchild Semiconductor Corporation
MOC303XM, MOC304XM Rev. 1.0.7
7
www.fairchildsemi.com
 

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