MOC3081 Datasheet, PDF (4/6 Pages) Motorola, Inc – 6-Pin DIP Zero-Cross Optoisolators Triac Driver Output

MOC3081 MOC3082 MOC3083
VCC Rin ₁
6 ^{360 Ω}
2 _{MOC3081–83} 5
3
4
330
39
0.01
LOAD
HOT
240 Vac
NEUTRAL
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 MOC3081, 10 mA for the MOC3082,
and 5 mA for the MOC3083. 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.
* For highly inductive loads (power factor < 0.5), change this value to
360 ohms.
Figure 8. Hot–Line Switching Application Circuit
R1 D1
VCC
1
6
Rin _{2 MOC3081–83 5}
SCR
3
4
360 Ω
R2
240 Vac
Suggested method of firing two, back–to–back SCR’s,
with a Motorola triac driver. Diodes can be 1N4001; resis-
tors, R1 and R2, are optional 330 ohms.
SCR
NOTE: This device should not be used to drive a load directly. It is
intended to be a trigger device only.
D2
LOAD
Figure 9. Inverse–Parallel SCR Driver Circuit
4
Motorola Optoelectronics Device Data