Renesas provides a wide range of Photocouplers (Optocouplers), including IC output photocouplers (optocouplers) featuring a high response from 1Mbps to 15Mbps, as well as general purpose transistor output devices featuring high isolation voltage, high temperature operation and compliance with various international safety standards. For motor drive applications, dedicated photocouplers provide high isolation voltage, high temperature operation, high output current, and high-speed switching.

Technical Description and Precautions

Technical descriptions of features, specifications, structure, and characteristics of photocouplers/optocouplers.

Photocouplers/Optocouplers

Explanation of Specifications

General specifications for various usage environments including absolute maximum ratings and electrical characteristics are available.

How Photocouplers Are Used

Photocouplers are mainly used as a switching device to transfer pulse signals and to transfer feedback error signals in analog switching regulators.

Noise Phenomena

Since a photocoupler operates without any circuit connection to the base of a phototransistor, two typical types of noise phenomena are sometimes generated.

 

CTR/Response Time

Learn about the current transfer ratio (CTR) characteristics and response time of photocouplers/optocouplers.

AC Input Capable Photocouplers

Learn how an AC input capable photocoupler enables the input of an AC current using two LEDs connected back-to-back on the input side.

Photocouplers vs. OCMOS FETS

Both photocouplers/optocouplers and Optical-Coupled MOSFET (SSRs) transmit signals while remaining electrically isolated, learn the differences between these devices.

 

Solid State Relays (OCMOS FETs)

Specifications

General specifications for various usage environments including absolute maximum ratings and electrical characteristics are available for Renesas OCMOS FETs.

Structure and Features

An optical-coupled MOSFET is a full solid state relay which consists of a light-emitting diode (LED) for the input side and MOSFETs for the contact point.

Operating Models

There are two types of optical-coupled MOSFETs, the "make" type (normally open) and "break" type (normally closed).

 

Precautions for Correct Usage of Optoelectronics

Precautions for Correct Usage

To obtain the requisite optical characteristics when using optoelectronic devices, special care should be used during mounting, as well as other precautions.

Safety Standards Classification Chart (Photocouplers / Optocouplers) Approval List

Photocouplers/Optocouplers Safety Standards Classification Chart (UL, CSA, BSI, VDE Approval)
Photocouplers/Optocouplers Safety Standards Classification Chart (SEMKO, NEMKO, DEMKO, FIMKO, CQC)

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