USB powered (USB-PD) has become the mainstream standard for fast charging and the use of unified Type-C connectors to power various mobile and battery powered devices. In the newly released USB-PD rev 3.1 standard, the extended power range (EPR) specification can support wide output voltage range and high power transmission. Unification, high power capacity and small size with low system cost have become the main driving force for the development of adapter and charger markets. In order to accelerate this trend, Infineon Technology Co., Ltd. (FSE code: IFX/OTCQX code: IFNNY) launched a new XDP ™ Digital power supply XDPS2221. This highly integrated combined controller IC for USB-PD supports high power wide input and output voltage applications with an output voltage of up to 28V.

    The device integrates an AC-DC power factor correction (PFC) controller and a DC-DC hybrid flyback controller (HFB) (also known as asymmetric half bridge (AHB) flyback controller) in a single package. By coordinating the operation of these two levels, regulatory requirements can be easily met. In addition, due to further integration of all grid drivers, 600V high-voltage starting unit for initial IC voltage supply, and certified active X capacitor discharge circuit, external BOM cost and number of components are reduced. This product is based on the combination of the new zero voltage switching (ZVS) HFB topology and gallium nitride devices, and can provide efficiency that is superior to similar products under various line/load conditions. With these characteristics and inherent topology advantages, such as zero voltage switching, resonant energy transmission for reducing transformer size, etc., the system designed with XDPS2221 can achieve extremely high power density.

    In addition, this new combined IC can synchronize PFC and HFB burst mode operation, thus achieving the minimum no-load standby input power performance. Enhanced quasi resonant multi-mode PFC with integrated auto enable/disable function and adaptive bus voltage control maximizes average and light load efficiency. In addition, you can choose to disable the integrated PFC function and use any type of external PFC controller.

    The hybrid flyback stage achieves robust regulation and fast dynamic load response through peak current control operation. In order to ensure ZVS operation under all conditions, the hybrid flyback stage adds the ZVS pulse insertion function, and also includes the prevention of cross conduction of body diodes under discontinuous conduction mode. XDPS2221 also provides easily configurable parameters through the graphical user interface to optimize system performance.