FODM3082R1 Fairchild Optoelectronics Group, FODM3082R1 Datasheet - Page 8

• Manufacturer Part Number: FODM3082R1
• Description: OPTOCOUPLER TRIAC 800V 4-SMD
• Manufacturer: Fairchild Optoelectronics Group

Specifications of FODM3082R1

• Voltage - Isolation: 3750Vrms
• Number Of Channels: 1
• Voltage - Off State: 800V
• Output Type: AC, Triac, Zero Cross
• Current - Gate Trigger (igt) (max): 10mA
• Current - Hold (ih): 300µA
• Current - Dc Forward (if): 60mA
• Current - Output / Channel: 70mA
• Mounting Type: Surface Mount
• Package / Case: 4-SMD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

©2006 Fairchild Semiconductor Corporation
FODM3062, FODM3063, FODM3082, FODM3083 Rev. 1.0.9
If sufficient holding current is still flowing through the
opto-TRIAC, the opto-TRIAC will turn-on and attempt
to carry the power TRIACs load. This situation typically
causes the opto-TRIAC to operate beyond its
maximum current rating, and product and resistor
failures typically result. For this reason, using an opto-
TRIAC to drive a three quadrant “snubberless” power
TRIAC is not recommended.
Power in the 360Ω resistor, when driving a sensitive
gate 4 quadrant power TRIAC:
P = (I
P = (20mA + 1.5 / 330 Ω )
A 1/4 watt resistor is more than adequate for both the
360 Ω and 330 Ω resistors.
I
V
DF = 0.6%
GT
GT
GT
= 20mA
+V
= 1.5V
GT
/ 330 Ω )
2
x 360 Ω x DF
2
*x 360 Ω x 0.6% = 1.3mW
8
The real power in the snubber resistor is based upon
the integral of the power transient present when the
load commutes. A fast commuting transient may allow
a peak current of 4A to 8A in the snubbing filter.
For best
polarized AC unit with a low ESR. The 39Ω series
resistor sets a time constant and limits the peak
current. For a resistive load with a power factor near
unity, the commutating transients will be small. This
results in a very small peak current given the 0.01µF
capacitor’s reactance. Normally, for factional horse-
power reactive loads, the resistor found in the snubber
circuit will have a power rating from 1/2W to 2W. The
resistor should be a low inductance type to adequately
filter the high frequency transients.
results, the capacitor should be a non-
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