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参数资料
| 型号： | IL4217 |
| 厂商： | SIEMENS A G |
| 元件分类： | 光电耦合器 |
| 英文描述： | TRIAC DRIVER OPTOCOUPLER |
| 中文描述： | 1 CHANNEL TRIAC OUTPUT OPTOCOUPLER |
| 封装： | DIP-6 |
| 文件页数： | 3/3页 |
| 文件大小： | 85K |
| 代理商： | IL4217 |
5–3
IL4216/4217/4218
Figure 3. Peak LED current vs. duty factor, Tau
Figure 4. Maximum LED power dissipation
Figure 5. On-state terminal voltage vs. terminal current
Figure 6. Maximum output power dissipation
Power Factor Considerations
A snubber isn’t needed to eliminate false operation of the
TRIAC driver because of the IL411’s high static and commutat-
ing dv/dt with loads between 1 and 0.8 power factors. When
inductive loads with power factors less than 0.8 are being
driven, include a RC snubber or a single capacitor directly
across the device to damp the peak commutating dv/dt spike.
Normally a commutating dv/dt causes a turning-off device to
stay on due to the stored energy remaining in the turning-off
device.
But in the case of a zero voltage crossing optotriac, the com-
mutating dv/dt spikes can inhibit one half of the TRIAC from
turning on. If the spike potential exceeds the inhibit voltage of
the zero cross detection circuit, half of the TRIAC will be held-
off and not turn-on. This hold-off condition can be eliminated
by using a snubber or capacitor placed directly across the
optotriac as shown in Figure 7. Note that the value of the
capacitor increases as a function of the load current.
The hold-off condition also can be eliminated by providing a
higher level of LED drive current. The higher LED drive pro-
vides a larger photocurrent which causer. the phototransistor
to turn-on before the commutating spike has activated the zero
cross network. Figure 8 shows the relationship of the LED drive
for power factors of less than 1.0. The curve shows that if a
device requires 1.5 mA for a resistive load, then 1.8 times (2.7
mA) that amount would be required to control an inductive load
whose power factor is less than 0.3.
Figure 7. Shunt capacitance versus load current
versus power factor
Figure 8. Normalized LED trigger current versus
power factor
相关PDF资料 |
PDF描述 |
|---|---|
| IL4218 | Dip Switch |
| IL422-3V | Isolated 3Volt RS422/RS485 Interface |
| IL485 | RES, 1500 OHM 1% 1/8W |
| IL55 | PHOTODARLINGTON OPTOCOUPLER |
| ILQ30 | PHOTODARLINGTON OPTOCOUPLER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IL42171001 | 制造商:Vishay Intertechnologies 功能描述: |
| IL4217-1001 | 制造商:Vishay Angstrohm 功能描述:OPTOCOUPLER PHOTOTRIAC OUTPUT HIGH DV/DT VERY LOW INPUT CURRENT |
| IL4217-X007 | 功能描述:三极与 SCR 输出光电耦合器 Phototriac Output, Low Input Current RoHS:否 制造商:Vishay Semiconductors 输出设备:PhotoTriac 每芯片的通道数量: 绝缘电压:3750 Vrms 正向电流:10 mA 正向电压:1.2 V 最大触发电流:10 mA 关断状态下输出电压-VDRM:600 V 最大连续输出电流: 零交叉电路: 封装:Reel |
| IL4217-X009 | 功能描述:三极与 SCR 输出光电耦合器 Phototriac Output, Low Input Current RoHS:否 制造商:Vishay Semiconductors 输出设备:PhotoTriac 每芯片的通道数量: 绝缘电压:3750 Vrms 正向电流:10 mA 正向电压:1.2 V 最大触发电流:10 mA 关断状态下输出电压-VDRM:600 V 最大连续输出电流: 零交叉电路: 封装:Reel |
| IL4218 | 功能描述:三极与 SCR 输出光电耦合器 Phototriac Output Very Low Input Curr RoHS:否 制造商:Vishay Semiconductors 输出设备:PhotoTriac 每芯片的通道数量: 绝缘电压:3750 Vrms 正向电流:10 mA 正向电压:1.2 V 最大触发电流:10 mA 关断状态下输出电压-VDRM:600 V 最大连续输出电流: 零交叉电路: 封装:Reel |
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