A Power Conversion System (PCS) is an integrated electronic system that manages the conversion of electrical power between different forms, typically from AC (alternating current) to DC (direct current) and vice versa. With increased reliability and outstanding performance, Infineon's CoolSET™ AC-DC integrated power stages are designed to offer additional protection to increase system robustness. To achieve fast start-up performance, the fifth-generation controller utilizes the high-voltage power supply IC. An isolated power supply is a power supply that is electrically isolated from the rest of the circuit that it is powering, often by an isolation transformer. This means that power and voltage is transferred from the input to the output without a direct electrical connection between the two. An AC/DC bidirectional power supply module not only delivers energy but also recovers unused power, significantly improving the efficiency of modern energy systems. This article explains its functionality, benefits, and applications, offering a clear overview of this important technology. To meet the need for adaptive rapid charging systems, Power Integrations has developed the ChiPhy (charger physical interface) family of ICs.