moc3051 Freescale Semiconductor, Inc, moc3051 Datasheet - Page 4

• Manufacturer Part Number: moc3051
• Description: 6-pin Dip Random-phase Optoisolators Triac Drivers
• Manufacturer: Freescale Semiconductor, Inc

MOC3051 MOC3052
4
1.5
1.4
1.3
1.2
1.1
0.9
0.8
0.7
0.6
0.5
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
1
1
0
0.001
– 40
Figure 8. ED Trigger Current, I FT , versus dv/dt
– 30 – 20 –10
0.01
Figure 6. Holding Current, I H
T A , AMBIENT TEMPERATURE ( C)
0.1
versus Temperature
0
10
dv/dt (V/ s)
1
20
30
10
NORMALIZED TO:
40
TYPICAL ELECTRICAL CHARACTERISTICS
I FT at 3 V
100
50
60
1000
70
80
10000
T A = 25 C
I FT versus dv/dt
internal noise rejection circuits which prevent false triggering
of the device in the event of fast raising line voltage tran-
sients. Inductive loads generate a commutating dv/dt that
may activate the triac drivers noise suppression circuits. This
prevents the device from turning on at its specified trigger
current. It will in this case go into the mode of “half waving” of
the load. Half waving of the load may destroy the power triac
and the load.
sus the reapplied voltage rise with a Vp of 400 V. This dv/dt
condition simulates a worst case commutating dv/dt ampli-
tude.
tating dv/dt reaches 1000 V/ s. Practical loads generate a
commutating dv/dt of less than 50 V/ s. The data sheet spe-
cified I FT is therefore applicable for all practical inductive
loads and load factors.
Triac drivers with good noise immunity (dv/dt static) have
Figure 8 shows the dependency of the triac drivers I FT ver-
It can be seen that the I FT does not change until a commu-
100
10
1
– 40
– 30 – 20 –10 0
Figure 7. Leakage Current, I DRM
T A , AMBIENT TEMPERATURE ( C)
versus Temperature
Motorola Optoelectronics Device Data
10
20
30
40
50
60 70
80