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Contactors & power relay

Products and reference designs
Block diagram

Contactors & power relay

Block diagram

Overview

Our integrated circuits and reference designs help you create reliable and high-performing contractor circuits for switching loads such as motors, HVAC, lighting and heating to a power supply.

Design requirements

Innovative contractor circuit designs often require:

  • Monitoring current and temperature faults to drive solenoid relays or motor drives.
  • Highly efficient architecture to power from 1/3-phase AC or auxiliary DC supply.
  • Adjustable trip timing settings and diagnostics to detect stuck actuators.

Block diagram

Find products and reference designs for your system.

Contactors & power relay

M M R R Y Y B B N N HMI HMI LED Driver LED Driver Interface Isolation Interface Isolation ISO ISO ISOW ISOW Non-Isolated AFE Non-Isolated AFE Reference Reference ADC ADC AMP AMP Comparator Comparator 12V 12V 5V 5V 3.3V 3.3V Serial Interface Isolation Serial Interface Isolation ISO ISO ISOW ISOW Wireless Interface Wireless Interface LPRF LPRF Serial Interface Serial Interface RS-232 RS-232 CAN CAN RS-485 RS-485 ESD Diode ESD Diode TVS TVS Isolated DC/DC Power Supply Isolated DC/DC Power Supply Load Switch Load Switch Load Switch Load Switch LDO LDO LDO LDO Transformer Driver Transformer Driver Iso power Iso power Isolated AC/DC Power Supply Isolated AC/DC Power Supply PWM PWM DC-DC DC-DC Flyback Converter Flyback Converter Reference Reference Non-Isolated DC/DC Power Supply Non-Isolated DC/DC Power Supply LDO LDO E-Fuse E-Fuse DC-DC DC-DC Isolated AFE Isolated AFE ADC ADC AMC AMC Reference Reference Comparator Comparator Flux Gate/Hall sensors Flux Gate/Hall sensors Power Stage Power Stage Solenoid Driver Solenoid Driver Relay Driver Relay Driver Position Sensor Position Sensor Trip Coil Supervision AFE Trip Coil Supervision AFE Reference Reference Comparator Comparator AMP AMP Signal Input Protection Signal Input Protection Protection Protection Protection Protection Protection Protection CT CT R R div div R R SH SH Self-Diagnostics/Monitoring Self-Diagnostics/Monitoring Temperature Temperature Reset Reset Humidity Humidity Clocking Clocking Clock Buffer Clock Buffer Synthesizer Synthesizer Digital Processing Digital Processing Logic Gates Logic Gates Main MCU Main MCU ADC ADC

Technical documentation

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Type Title Date
White paper High Voltage Isolation Quality and Reliability for AMC130x 27 Jun 2016
White paper Enabling and integrating wired & wireless technologies for grid interoperability 22 Mar 2019
White paper Detection of Plunger Movement in DC Solenoids White Paper 19 Apr 2021
White paper Overcurrent protection enables more efficient and reliable systems 16 May 2016
Application note Is Your IGBT Gate-Driver Power Supply Optimized 12 Mar 2015

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