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Photovoltaic output optocouplers and MOSFETs replace mechanical relays

Overview

• Solid state relay circuits for photovoltaic couplers to directly drive power MOSFETs.
• Example introduction of 5A DC relay application.
• Design guidance for solid state relays as replacements for mechanical relays.

Features

• Solid state relays have longer service life, higher reliability and stronger quiet performance than mechanical relays
• Photovoltaic coupler: TLP3906
• MOSFET: TPH1R306PL

Blockdiagram

Design Files

Documentation

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Update:2025-08-09 12:36:55

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