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About information presented in this cross reference

The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.

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什么是光耦?

光耦:
光耦是将发光二极管(LED)和光电探测器集成于一个封装中的器件。与其它光学器件不同,光不会发射至封装外。其外观类似于非隔离器/固态继电器。虽然光耦是一种光学器件,但它不处理光,而是处理电信号。

光耦的操作实例:

(1)LED接通(0⇒1)。
(2)LED光进入光电晶体管。
(3)光电晶体管接通。
(4)输出电压改变0⇒1。

(1)LED关断(1⇒0)。
(2)LED光停止进入光电晶体管。
(3)光电晶体管关断。
(4)输出电压改变1⇒0。

*右边的剖面图显示了一个采用双模结构的透射型晶体管输出光耦。

什么是光耦?

第Ⅴ章:隔离器/固态继电器

光半导体的类型
LED的发光原理
LED的波长范围
为什么需要光耦?
光耦的类型
光耦的类型(封装)
光耦的类型(内部结构)
光耦的安全标准
光耦的特性(电流传输比:CTR)
光耦的主要特性(触发LED电流)
光耦的老化变化数据
如何使用光耦
如何使用光耦“输入电流”
如何使用光耦“输出电流”
如何使用光耦“输出侧电阻器”
如何使用光耦检查

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