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TIDA-050059

Overcurrent and overtemperature protection for solid-state relays reference design

Design files

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
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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.

download Design guide — TIDA-050059
PDF | HTML
TIDUC65.PDF (1269 KB)

Reference design overview and verified performance test data

download Assembly drawing — TIDA-050059
TIDMAF9.PDF (263 KB)

Detailed overview of design layout for component placement

download Bill of materials (BOM) — TIDA-050059
TIDMAF8.PDF (156 KB)

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

download CAD/CAE symbol — TIDA-050059
TIDMAG1.ZIP (1647 KB)

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

download Gerber file — TIDA-050059
TIDCG70.ZIP (12084 KB)

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

download PCB layout — TIDA-050059
TIDMAG0.PDF (1113 KB)

PCB layer plot file used for generating PCB design layout

download Schematic — TIDA-050059
TIDMAF7.PDF (365 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

Isolated comparators

AMC23C14 — Dual, fast-response, reinforced, isolated window comparator with adjustable threshold

Data sheet: PDF | HTML
Solid-state relays

TPSI3052 — Isolated switch driver with integrated 15-V gate supply

Data sheet: PDF | HTML
Solid-state relays

TPSI3050-Q1 — Automotive reinforced isolated switch driver with integrated 10-V gate supply

Data sheet: PDF | HTML
Digital isolators

ISO7310-Q1 — Automotive, low-power, single-channel, 25-Mbps digital isolator

Data sheet: PDF | HTML
Temperature switches

TMP392 — TMP392 Dual-channel (hot & warm), resistor-programmable temperature switch

Data sheet: PDF | HTML
Solid-state relays

TPSI3052-Q1 — Automotive reinforced isolated switch driver with integrated 15-V gate supply

Data sheet: PDF | HTML
AND gates

SN74HCS09 — 4-ch 2-input 2-V to 6-V AND gate with open-drain outputs and Schmitt-trigger inputs

Data sheet: PDF
Solid-state relays

TPSI3050 — Isolated switch driver with integrated 10-V gate supply

Data sheet: PDF | HTML

Start development

Software

Calculation tool

SLVRBI9 — TPSI305x Design Calculator

Supported products & hardware

Supported products & hardware

Products
Solid-state relays
TPSI3050 — Isolated switch driver with integrated 10-V gate supply TPSI3050-Q1 — Automotive reinforced isolated switch driver with integrated 10-V gate supply TPSI3050M — Extended temperature range, isolated switch driver with integrated 10V gate supply TPSI3052 — Isolated switch driver with integrated 15-V gate supply TPSI3052-Q1 — Automotive reinforced isolated switch driver with integrated 15-V gate supply
Hardware development
Reference design
TIDA-050058 — Zero-cross switching for solid-state relays reference design TIDA-050059 — Overcurrent and overtemperature protection for solid-state relays reference design
Download options

SLVRBI9 — TPSI305x Design Calculator

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Version: 01.00.00.0E
Release date: Mar 21, 2025
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TPSI305x_calculator_1p25.xlsx  — 189 K

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Products
Solid-state relays
TPSI3050 — Isolated switch driver with integrated 10-V gate supply TPSI3050-Q1 — Automotive reinforced isolated switch driver with integrated 10-V gate supply TPSI3050M — Extended temperature range, isolated switch driver with integrated 10V gate supply TPSI3052 — Isolated switch driver with integrated 15-V gate supply TPSI3052-Q1 — Automotive reinforced isolated switch driver with integrated 15-V gate supply
Hardware development
Reference design
TIDA-050058 — Zero-cross switching for solid-state relays reference design TIDA-050059 — Overcurrent and overtemperature protection for solid-state relays reference design

Release Information

The design resource accessed as www.ti.com/lit/zip/slvrbi9 or www.ti.com/lit/xx/slvrbi9e/slvrbi9e.zip has been migrated to a new user experience at www.ti.com/tool/download/SLVRBI9. Please update any bookmarks accordingly.

Technical documentation

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Type Title Date
* Design guide Overcurrent and Overtemperature Protection for Solid-State Relays Ref Design PDF | HTML May 4, 2022
Technical article How to achieve higher-reliability isolation and a smaller solution size with solid PDF | HTML May 9, 2022

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