調光LED與傳統TRIAC調光器
TRIAC調光器設計用於電阻性負載如白熾燈或滷素燈,有一個顯著的安裝基礎,在美國和世界各地的。不幸的是,這些相位控制調光器是不容易兼容的LED由於LED不顯示為阻性負載。因此,基於LED的解決方案,使用傳統的LED驅動器將無法按預期與可控矽調光器壁。
The TRIAC is a semiconductor triode that features two terminals and a gate. It may help to think of the TRIAC as two silicon controlled rectifiers (SCRs), which are a type of thyristor, placed back to back. A typical SCR has four layers of alternating P-type and N-type semiconductor material.
An SCR turns off when no current is flowing through it, and it can be switched on when a current is applied to its gate. An SCR conducts current in a single direction, but a TRIAC can conduct current in either direction, which is why a TRIAC looks like two SCRs.