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參數(shù)資料
| 型號： | MOC2R60 |
| 廠商： | Motorola, Inc. |
| 英文描述： | OPTOISOLATOR 2 AMPS RANDOM-PHASE TRIAC OUTPUT 600 VOLTS |
| 中文描述： | 光隔離器2安培隨機相位雙向晶閘管輸出600伏 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 228K |
| 代理商： | MOC2R60 |
4
Motorola Optoelectronics Device Data
1.40
0.00
2.00
1.80
1.60
1.20
– 40
TA, AMBIENT TEMPERATURE (
°
C)
– 20
0
+ 25
+ 40
+ 60
1.00
+ 80
0.60
0.80
0.40
0.20
Figure 9. Holding Current versus
Ambient Temperature
1000
(
d
/
μ
40
TA, AMBIENT TEMPERATURE (
°
C)
Figure 10. dv/dt versus Ambient Temperature
10
0
– 40
– 20
0
20
80
120
60
100
100
+ 100
I
Static
Normalized
at 25
°
C
Commutating
IT = 30 mA – 2A(RMS)
F = 60 Hz
Phase Control Considerations
LED Trigger Current versus PW (normalized)
The Random Phase POWER OPTO Isolators are designed
to be phase controllable. They may be triggered at any phase
angle within the AC sine wave. Phase control may be accom-
plished by an AC line zero cross detector and a variable pulse
delay generator which is synchronized to the zero cross de-
tector. The same task can be accomplished by a microproces-
sor 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
μ
s must have an increased ampli-
tude as shown on Figure 11. This graph shows the dependen-
cy of the trigger current IFT versus the pulse width t (PW). The
reason for the IFT dependency on 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 speci-
fied in the device characteristic. The normalized IFT has to be
multiplied with the devices guaranteed static trigger current.
Example:
Guaranteed IFT = 10 mA, Trigger pulse width PW = 3
μ
s
IFT (pulsed) = 10 mA x 5 = 50 mA
Minimum LED Off Time in Phase Control Applications
In phase control applications one intends to be able to con-
trol each AC sine half wave from 0 to 180 degrees. Turn on at
zero degrees means full power, and turn on at 180 degrees
means zero power. This is not quite possible in reality be-
cause triac driver and triac have a fixed turn on time when
activated at zero degrees. At a phase control angle close to
180 degrees the turn on pulse at the trailing edge of the AC
sine wave must be limited to end 200
μ
s before AC zero
cross as shown in Figure 12. This assures that the device
has time to switch off. Shorter times may cause loss off con-
trol at the following half cycle.
Figure 11. LED Current Required to Trigger
versus LED Pulse Width
PWin, LED TRIGGER PULSE WIDTH (
μ
s)
1
25
20
15
10
5
0
2
5
10
20
50
100
NORMALIZED TO:
PWin
≥
100
μ
s
I
Figure 12. Minimum Time for LED Turn-Off to
Zero Cross of AC Trailing Edge
AC SINE
0
°
180
°
LED PW
LED CURRENT
LED TURN OFF MIN 200
μ
s
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