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TIDA-050059

Overcurrent and overtemperature protection for AC solid state relay reference design

TIDA-050059

Design files

Overview

This reference design shows how to achieve overcurrent and overtemperature protection for a solid-state relay. The reference design features the TPSI3050-Q1 5-kVRMS reinforced isolated switch driver. TPSI3050-Q1 device integrates a laminate transformer to achieve isolation while transferring signal and power to the secondary side. This removes the need for any isolated bias supply. In addition, the TPSI3050-Q1 device can supply power to external circuitry located on the high voltage (HV) side. This reference design can support up to 500-VDC or 350-VAC switching with a max of 4-A loading conditions.

Features
  • No isolated secondary supply required
  • 3-kVRMS reinforced isolation
  • 500-VDC/350-VRMS load with 4-A max
  • Two-level overcurrent protection
    • >2-A 100-ms load disconnect delay
    • >5-A immediate load disconnect
  • Two-level overtemperature protection
    • >60°C LED visual warning
    • >90°C immediate load disconnect

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUC65.PDF (1268 K)

Reference design overview and verified performance test data

TIDMAF7.PDF (364 K)

Detailed schematic diagram for design layout and components

TIDMAF8.PDF (156 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

SLVRBI9A.ZIP (48 K)

Tool for calculating critical component values required in the reference design

TIDMAF9.PDF (263 K)

Detailed overview of design layout for component placement

TIDMAG1.ZIP (1646 K)

Files used for 3D models or 2D drawings of IC components

TIDCG70.ZIP (12084 K)

Design file that contains information on physical board layer of design PCB

TIDMAG0.PDF (1112 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Solid-state relays

TPSI3050Isolated switch driver with integrated 10-V gate supply

Data sheet document-pdfAcrobat PDF open-in-new HTML
Solid-state relays

TPSI3050-Q1Automotive reinforced isolated switch driver with integrated 10-V gate supply

Data sheet document-pdfAcrobat PDF open-in-new HTML
Solid-state relays

TPSI3052Isolated switch driver with integrated 15-V gate supply

Data sheet document-pdfAcrobat PDF open-in-new HTML
Solid-state relays

TPSI3052-Q1Automotive reinforced isolated switch driver with integrated 15-V gate supply

Data sheet document-pdfAcrobat PDF open-in-new HTML
AND gates

SN74HCS09Schmitt-trigger inputs quadruple 2-input AND gates with open-drain outputs

Data sheet document-pdfAcrobat PDF
Digital isolators

ISO7310-Q1Automotive, low-power, single-channel, 25-Mbps digital isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated comparators

AMC23C14Dual, fast-response, reinforced, isolated window comparator with adjustable threshold

Data sheet document-pdfAcrobat PDF open-in-new HTML
Temperature switches

TMP392TMP392 Dual-channel (hot & warm), resistor-programmable temperature switch

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide Overcurrent and Overtemperature Protection for Solid-State Relays Ref Design PDF | HTML May 04, 2022
Technical article How to achieve higher-reliability isolation and a smaller solution size with solid-state relays May 09, 2022

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