Self-Powered AC Solid State Relay with MOSFETs Reference Design

(ACTIVE) TIDA-00377

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Key Document

Description

The self-powered 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 self-powered through the 24V AC power line, eliminating additional power consumption of thermostat battery. The MOSFETs can switch fast enough to allow self-charging without affecting the load.

Features
  • No clicking sound
  • Cost efficient BOM
  • MOSFET-based design for fast on/off switching
  • Zero thermostat battery power consumption
  • Under-voltage and over-current protection

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 (7)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ATL431  2.5V Low-Iq Adjustable Precision Shunt Regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
CSD19537Q3  100V N-Channel NexFET Power MOSFET  MOSFETs  Sample & Buy Not Available
LP339  Quad, Low-Power, General Purpose Differential Comparator  Amplifiers  Sample & Buy Not Available
SN74AUP1G14  Low-Power Single Schmitt-Trigger Inverter  Buffer/driver  Sample & Buy Not Available
SN74AUP1G17  Low-Power Single Schmitt-Trigger Buffer  Buffer/driver  Sample & Buy Not Available
SN74AUP1G74  Low-Power Single Positive-Edge-Triggered D-Type Flip-Flop  Flip-flop/latch/register  Sample & Buy View Design Kits & Evaluation Modules
SN74AUP2G08  Low-Power Dual 2-Input Positive-AND Gate  Gate  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ATL431 Download Download
CSD19537Q3 VSON-CLIP (DQG)| 8 Download Download
LP339 Download Download
Download Download
SN74AUP1G14 Download -
Download Download
Download Download
Download
Download Download
Download -
Download Download
Download Download
SN74AUP1G17 Download -
Download Download
Download Download
Download
Download Download
Download -
Download Download
Download Download
SN74AUP1G74 Download Download
Download Download
Download Download
Download -
Download -
SN74AUP2G08 Download
Download Download
Download Download
Download -
Download -

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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 1468 26 Aug 2016 0
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 642 26 Aug 2016 0
ZIP 15480 26 Aug 2016 0
PDF 1381 26 Aug 2016 0
PDF 188 26 Aug 2016 0
PDF 72 26 Aug 2016 0
PDF 560 26 Aug 2016 0
Related Tools & Software

Reference Designs  ( 3 )


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