TIDA-050058

Zero-cross switching for solid-state relays reference design

TIDA-050058

Design files

Overview

This reference design shows how to achieve zero-cross switching (ZCS) with a solid-state relay. The reference design features the TPSI3050-Q1 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 auxiliary current (IAUX) to external circuitry located on the high voltage (HV) side. ZCS is done while maintaining signal isolation between the low voltage (LV) and HV side. This reference designed achieved a 12-V, 200-µs delay ZCS with a 110-VRMS, 60-Hz AC source.

Features
  • No isolated secondary supply required
  • 5-kVRMS reinforced isolation
  • 500-VDC/350-VRMS load with 4-A max
  • Zero-voltage switching (ZVS)
  • Solid-state relay (SSR) solution
  • Less than 4-µs 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.

PDF | HTML
TIDUCF7.PDF (1171 K)

Reference design overview and verified performance test data

TIDMAF2.PDF (289 K)

Detailed schematic diagram for design layout and components

TIDMAF3.PDF (155 K)

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

TIDMAF4.PDF (208 K)

Detailed overview of design layout for component placement

TIDMAF6.ZIP (1268 K)

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

TIDCG69.ZIP (2875 K)

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

TIDMAF5.PDF (729 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: PDF | HTML
Solid-state relays

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

Data sheet: PDF | HTML
Solid-state relays

TPSI3052Isolated switch driver with integrated 15-V gate supply

Data sheet: PDF | HTML
Solid-state relays

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

Data sheet: PDF | HTML
Analog switches & muxes

TMUX12195-V, 2:1 (SPDT), 1-channel general-purpose analog switch with 1.8-V input logic

Data sheet: PDF | HTML
D-type flip-flops

SN74HCS72-Q1Automotive Schmitt-trigger input dual D-type negative-edge-triggered flip-flops w/ clear and preset

Data sheet: PDF | HTML
Isolated comparators

AMC23C10Fast-response, reinforced, isolated differential comparator with open-drain and push-pull outputs

Data sheet: PDF | HTML

Start development

Software

Calculation tool

SLVRBI9 TPSI3050-Q1, TPSI3052-Q1, TPSI3050, TPSI3052 Design Calculator

This calculator may be used to estimate the power transfer and associated startup time and maximum switching frequency possible of the TPSI305x family of devices given various user inputs.
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 TPSI3052 Isolated switch driver with integrated 15-V gate supply TPSI3052-Q1 Automotive reinforced isolated switch driver with integrated 15-V gate supply

Technical documentation

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Type Title Date
* Design guide Zero-Cross Switching for Solid-State Relays Reference Design PDF | HTML May 04, 2022
Technical article How to achieve higher-reliability isolation and a smaller solution size with solid PDF | HTML May 09, 2022

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