TIDA-01064

Low BOM Cost AC Solid State Relay with MOSFETs Reference Design

TIDA-01064

Design files

Overview

The low BOM cost ac solid state relay with MOSFETs reference design is a single relay replacement that enables efficient power management for a low-power alternative to standard electromechanical relays in thermostat applications. This SSR reference design is the base model of the self-powered solid state relay providing a low BOM cost solution for low cost thermostats.

Features
  • No clicking sound
  • Low cost BOM
  • Self-powered
  • Zero power from the thermostat battery
  • Inherent snubber circuit reducing voltage spike created by inductive loads

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.

TIDUC87A.PDF (1727 K)

Reference design overview and verified performance test data

TIDRNN9.PDF (466 K)

Detailed schematic diagram for design layout and components

TIDRNO0.PDF (71 K)

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

TIDRNO1.PDF (164 K)

Detailed overview of design layout for component placement

TIDRNO3.ZIP (36283 K)

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

TIDCCN7.ZIP (1062 K)

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

TIDRNO2.PDF (995 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Shunt voltage references

ATL4312.5-V low-IQ adjustable precision shunt regulator

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

LP339Quad low-power commercial grade standard comparator

Data sheet document-pdfAcrobat PDF
D-type flip-flops

SN74AUP1G74Low-Power Single Positive-Edge-Triggered D-Type Flip-Flop

Data sheet document-pdfAcrobat PDF open-in-new HTML
N-channel MOSFETs

CSD18541F560-V, N channel NexFET™ power MOSFET, single LGA 1.5 mm x 0.8mm, 65 mOhm, gate ESD protection

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

Technical documentation

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Type Title Date
* Design guide Low-Cost AC Solid-State Relay With MOSFETs Reference Design (Rev. A) Mar. 06, 2017
More literature How to power your thermostat using solid state relays Sep. 29, 2016
More literature A modern approach to solid-state relay design Sep. 29, 2016
More literature Click! Clack! What's the setback in your thermostat? Sep. 29, 2016

Related design resources

Reference designs

REFERENCE DESIGN
TIDA-00377 Self-Powered AC Solid State Relay with MOSFETs Reference Design TIDA-00751 Solid State Relay 24V AC Switch with Galvanic Isolation Reference Design TIDA-01065 Isolated Self-Powered AC Solid State Relay with MOSFETs Reference Design

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