ICEE-Power-SCR-OptoisolaterDriver-MOC Series-MOC3081/2/3: 6-Pin DIP Zero-Cross TriacDriver Optocoupler (800 V Peak)

English Words:

• Thyristor: 可控硅

• SCR: 单向可控硅
  
  SCRs are unidirectional (one-way) current devices, making them useful for controlling DC only. If two SCRs are joined in back-to-back parallel fashion just like two Shockley diodes were joined together to form a DIAC, we have a new device known as the TRIAC: (Figure below) The TRIAC SCR equivalent and, TRIAC schematic symbol.

• TRAIC: 三端双向可控硅, The Triac is a three-terminal bi-directional thyristor. It was developed as a device to control AC power. The triac replaces a pair of inverse parallel-connected SCRs. For low-to medium-current applications (up to about 100 A), the triac is less costly than two SCRs.

总体结构上类似“达林顿式双管复合结构”由光耦输出级经Zero-Cross过零检测后驱动

目标实现隔离的极小电流/电压驱动大电流/高电压；

MOC30系列的内置双向可控硅，与其要驱动的外置双向可控硅，是内外双管“达林顿式复合”结构？

只是MOC30系列，另外还有红外光的光耦 和 Zero-Cross过零检测，

光耦的输出级经过Zero-Cross过零检测就可作为驱动信号，带动内置SCR与外置SCR的“达林顿式复合”SCR开关, 驱动外置SCR的大功率器件所连接的高功率设备;

• 典型应用：
  
  
  
  

• 官方文档：
  
  Onsemi的官方Datasheet