TIDA-00751 Reference Design

Texas Instruments

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

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 replacementLow power solid state relay with silent operationNo clicking noiseIn OFF-mode: 24-VAC line provides energy to the systemCost efficient BOM
Applications
  • Light commercial indoor air handler
  • Glass break detector
  • Process Analytics (pH
  • Gas
  • Concentration
  • Force & Humidity)
  • Thermostat
  • Fire alarm control panel (FACP)
  • Intrusion control panel
  • Elevator main control panel
  • HVAC motor control
  • Light commercial outdoor condensing unit
Product Categories
  • Power management

Parts

Part Number Name Companion Part
LMC555 LMC555 Buy Datasheet
SN74AUP1G74 SN74AUP1G74 Buy Datasheet
SN74AUP3G14 SN74AUP3G14 Buy Datasheet
SN74LVC1G19 SN74LVC1G19 Buy Datasheet

Bill Of Materials

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Schematic

Quickly understand overall system functionality.

Download the schematic for TIDA-00751

Test Data

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Other Documents

Title Updated Type Size (KB)
TIDA-00751 Gerber 11 Dec 2015 ZIP 600
TIDA-00751 CAD Files 11 Dec 2015 ZIP 791
TIDA-00751 PCB 11 Dec 2015 PDF 994
TIDA-00751 Assembly Drawing 11 Dec 2015 PDF 139
TIDA-00751 BOM 11 Dec 2015 PDF 108
TIDA-00751 Schematic and Block Diagram 11 Dec 2015 PDF 388