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MOC3052M Datasheet(PDF) 4 Page - Fairchild Semiconductor

Part No. MOC3052M
Description  6-PIN DIP RANDOM-PHASE OPTOISOLATORS TRIAC DRIVERS (600 VOLT PEAK)
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

MOC3052M Datasheet(HTML) 4 Page - Fairchild Semiconductor

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9/2/04
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© 2004 Fairchild Semiconductor Corporation
6-PIN DIP RANDOM-PHASE
OPTOISOLATORS TRIAC DRIVERS
(600 VOLT PEAK)
MOC3051-M
MOC3052-M
IF versus Temperature (normalized)
This graph (figure 3) shows the increase of the trigger current
when the device is expected to operate at an ambient tempera-
ture below 25°C. Multiply the normalized IFT shown this graph
with the data sheet guaranteed IFT.
Example:
TA = -40°C, IFT = 10 mA
IFT @ -40°C = 10 mA x 1.4 = 14 mA
Phase Control Considerations
LED Trigger Current versus PW (normalized)
Random Phase Triac drivers are designed to be phase control-
lable. They may be triggered at any phase angle within the AC
sine wave. Phase control may be accomplished by an AC line
zero cross detector and a variable pulse delay generator which
is synchronized to the zero cross detector. The same task can
be accomplished by a microprocessor which is synchronized
to the AC zero crossing. The phase controlled trigger current
may be a very short pulse which saves energy delivered to the
input LED. LED trigger pulse currents shorter than 100 µs must
have an increased amplitude as shown on Figure 4. This graph
shows the dependency of the trigger current IFT versus the
pulse width can be seen on the chart delay t(d) versus the LED
trigger current.
IFT in the graph IFT versus (PW) is normalized in respect to the
minimum specified IFT for static condition, which is specified in
the device characteristic. The normalized IFT has to be multi-
plied with the devices guaranteed static trigger current.
Example:
Guaranteed IFT = 10 mA, Trigger pulse width PW = 3 µs
IFT (pulsed) = 10 mA x 5 = 50 mA
Figure. 4 LED Current Required to Trigger vs. LED Pulse Width
Figure. 2 On-State Characteristics
ON-STATE VOLTAGE - V
TM (V)
-3
-2
-1
0
1
2
3
-800
-600
-400
-200
0
200
400
600
800
PWin, LED TRIGGER PULSE WIDTH (µs)
1
25
20
15
10
5
0
25
10
20
50
100
NORMALIZED TO:
PWin ≥ 100 µs
Figure. 3 Trigger Current vs. Ambient Temperature
AMBIENT TEMPERATURE - TA (
oC)
-40
-20
0
20
40
60
80
100
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
Figure. 1 LED Forward Voltage vs. Forward Current
I
F - LED FORWARD CURRENT (mA)
110
100
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
T
A = -55
oC
T
A = 25
oC
T
A = 100
oC
NORMALIZED TO TA = 25°C


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