Photovoltaic-Output Photocoupler and MOSFET as Replacement for Mechanical Relay

Solid state relay with photovoltaic-output coupler, TLP3906, and MOSFET, TPH1R306PL. Describes design guidance of solid state relay circuit as replacement of mechanical relay.

HVAC application of photovoltaic-output photocoupler and MOSFET as replacement for mechanical relay.
Application circuit diagram of photovoltaic-output photocoupler and MOSFET as replacement for mechanical relay.

Features

  • Solid state relay acheives ""longer life"", ""higher reliability"", and ""more silence"" compared with mechanical relay
  • Photovoltaic coupler : TLP3906
  • MOSFET : TPH1R306PL

Description

  • Solid state relay circuit that phptovoltaic coupler drives power MOSFET directly.
  • Introduction of 5 A DC relay application example.
  • Design guidance of solid state relay as replacement of mechanical relay.

Design Documents

Materials for designers, such as an overview of circuit operation and explanations of design considerations. Please click on each tab to view the contents.

Used Toshiba Items

Part Number Device Category Portion Usage Description
Photocoupler (photovoltaic output) Driving MOSFET・1 Photocoupler (photovoltaic output), VOC=7 V / ISC=12 μA, 3750 Vrms, 4pin SO6
Power MOSFET (N-ch single 30V<VDSS≤60V) Current flow line・1 N-ch MOSFET, 60 V, 0.00134 Ω@10V, SOP Advance, U-MOSⅨ-H

Related Documents

We provide materials useful for designing and considering similar circuits, such as application notes for installed products. Please click on each tab to view the contents.

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