Shulou(Shulou.com)11/24 Report--

CTOnews.com, December 1 / PRNewswire-FirstCall-Asianet /-- USB Power (USB-PD) has become the mainstream standard for fast charging and the use of unified Type-C connectors for a variety of mobile and battery-powered devices. In the newly released USB-PD 3.1standard, the extended Power range (EPR) specification supports a wide output voltage range and high power transmission. Unification, high power capacity, low system cost and small size have become the main driving forces to promote the development of the adapter and charger market.

According to Infineon Technology official news, in order to accelerate this trend, Infineon Technology launched a new XDP digital power supply XDPS2221. This highly integrated two-in-one controller for USB-PD supports high power wide input and output voltage applications with output voltages up to 28V.

According to reports, 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. Through the cooperative operation of these two stages, the regulatory requirements can be easily met.

In addition, further integration of all gate drivers and 600V high-voltage start-up units for VCC power, as well as certified active X-capacitor discharge circuits, reduces BOM costs and the number of external components. Integrated gallium nitride devices, based on the new zero voltage switching (ZVS) HFB topology, provide superior efficiency under a variety of input and load conditions.

With these characteristics and inherent topology advantages, such as zero-voltage switching and resonant energy transmission to reduce the size of the transformer, the system designed by XDPS2221 can achieve very high power density.

CTOnews.com learned that this new two-in-one IC synchronizes the intermittent operation of PFC and HFB, thus achieving the lowest standby power performance. This enhanced quasi-resonant multimode PFC integrates automatic enable / disable functions and adaptive PFC to maximize average efficiency and light load efficiency. In addition, the built-in PFC function can be optionally disabled so that it can be used with any other type of external PFC controller.

The hybrid flyback stage achieves robust voltage 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 function of ZVS pulse insertion and the function of preventing body diode from crossing in discontinuous turn-on mode. Digital XDPS2221 can also optimize system performance by providing easy-to-configure parameters through a graphical user interface.

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