Solid State Relay 24V AC Switch with Galvanic Isolation Reference Design

(ACTIVE) TIDA-00751

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Key Document

Description

The solid state relay 24V AC Switch reference design is a single relay replacement that enables efficient power management for a low power alternative to standard electromechanical relays.  The OFF-mode provides energy to the system controller and the ON mode can switch fast enough to allow backup battery charging where electromechanical relays cannot.  The internal transformer enables isolation and a voltage multiplier ensures enough current to control other relays in the rest of the system.

Features
  • Single electromechanical relay replacement
  • Low power solid state relay with silent operation
  • No clicking noise
  • <1µs Turn-on and Turn-off switching time
  • In OFF-mode, 24-VAC line provides energy to the system
  • <200µA consumption in OFF-mode
  • Cost efficient BOM

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  



Schematic/Block Diagram

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Design Guide

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Design Files

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Bill of Materials (BOM)

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TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD19537Q3  100V N-Channel NexFET Power MOSFET  MOSFETs  Sample & Buy Not Available
LMC555  World’s smallest 555 timer with low power, high accuracy and a Fmax of 3MHz  Clock & timing  Sample & Buy View Design Kits & Evaluation Modules
SN74AUP1G74  Low-Power Single Positive-Edge-Triggered D-Type Flip-Flop  Flip-flop/latch/register  Sample & Buy View Design Kits & Evaluation Modules
SN74AUP3G14  Low-Power Triple Schmitt-Trigger Inverter  Buffer/driver  Not Available Not Available
SN74LVC1G19  1-of-2 Decoder/Demultiplexer  Specialty logic  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD19537Q3 VSON-CLIP (DQG)| 8 Download Download
LMC555 Download Download
Download
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SN74AUP1G74 Download Download
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SN74AUP3G14 Download Download
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SN74LVC1G19 Download Download
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Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

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Step 2: Download the Symbol and Footprint from the CAD.bxl file table.


Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1313 08 Mar 2016 31
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 600 11 Dec 2015 2
ZIP 791 11 Dec 2015 1 1
PDF 994 11 Dec 2015 0
PDF 139 11 Dec 2015 1 1
PDF 108 11 Dec 2015 3
PDF 388 11 Dec 2015 10
Related Tools & Software

Reference Designs  ( 3 )


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