Description

This app note presents a detailed description of the implementation of an AC-AC Automatic Voltage Regulator (AVR) using a GreenPAK SLG46537V CMIC. The purpose of AVRs is to maintain the voltage supplied to sensitive equipment within the predefined safe and functional limits of the device.

For such applications, autotransformers are commonly employed providing different taps on windings which can be selected by electromechanical relays depending on the input voltages. A suitable controller is required to sense the input voltage and select a suitable tap to obtain the controlled output voltage. The low-cost SLG46537V CMIC is ideally suited for this purpose since it provides sufficient control circuitry to meet the requirements. The implementation of this CMIC as an AVR controller is thoroughly tested using appropriate experimentation, and the results verify the viability of the idea.