3 Flyback Auxiliary Power Supply

Taking a common household air conditioner as an example, its standby power consumption typically ranges between 1-5W. Calculated over a 24-hour period, the daily standby power consumption falls within 0.024 to 0.12 kWh. Although this figure may seem insignificant, accumulated over time, the total energy consumed becomes substantial. Therefore, users should strive to minimize standby power consumption when using air conditioners.

Texas Instruments boasts a comprehensive portfolio of auxiliary power supply products, among which UCC28730 stands out as a notable mention. UCC28730 is a switching power supply chip with zero standby power consumption, supporting standby power below 5mW, thereby meeting energy-saving and environmental protection requirements. By leveraging Primary Side Regulation (PSR), it eliminates the need for optocouplers, simplifying circuit design and reducing costs. Furthermore, it features wake-up signal detection, enabling rapid response to large load steps and enhancing system responsiveness. The PMP31248 reference design showcases these capabilities of UCC28730.