MOC3081MS View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
View to exact match
MOC3081MS
Fairchild Semiconductor
MOC3081MS Datasheet PDF : 11 Pages
| |||
6-PIN DIP ZERO-CROSS
OPTOISOLATORS TRIAC DRIVER OUTPUT
(800 VOLT PEAK)
MOC3081M
MOC3082M
MOC3083M
800V
Vdc
PULSE
INPUT
RTEST
MERCURY
WETTED
RELAY
CTEST
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
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
504 V
Vmax = 800 V
0 VOLTS
dv/dt =
0.63 Vmax
τRC
=
504
τRC
τRC
Figure 10. Static dv/dt Test Waveform
Typical circuit 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, 15 mA for the MOC3081M, 10 mA for the MOC3082M, and 5 mA for
the MOC3083M. 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 use.
VCC
Rin
1
6 360 Ω
2
MOC3081M
5
MOC3082M
MOC3083M
3
4
FKPF12N80
39*
HOT
240 VAC
0.01
330 Ω
LOAD
* For highly inductive loads (power factor < 0.5), change this value to 360 ohms.
Figure 11. Hot-Line Switching Application Circuit
NEUTRAL
© 2003 Fairchild Semiconductor Corporation
Page 6 of 11
4/14/03
|
|
Share Link: