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HomeElectronicsInfineon launches the trade’s first PFC and hybrid flyback combo IC driving...

Infineon launches the trade’s first PFC and hybrid flyback combo IC driving efficiency in GaN-based USB-C adapters and chargers with EPR


USB energy supply (USB-PD) has emerged because the prevailing customary for quick charging and for supplying energy to all types of cell and battery-powered gadgets utilizing the unified type-C connector. In its newest launch, USB-PD rev 3.1, the Prolonged Energy Vary (EPR) specification helps a large output voltage vary with excessive energy supply. Key drivers for the evolution of the adapter and charger market are unification and high-power functionality mixed with small type elements at low system value. Fostering this pattern, Infineon Applied sciences AG now introduces the novel XDP digital energy XDPS2221. The highly-integrated combo controller IC for USB-PD helps excessive energy designs in vast enter and output voltage functions of as much as 28 V output voltage.

The gadget integrates an AC-DC energy issue correction (PFC) controller with a DC-DC hybrid flyback controller (HFB), also referred to as an asymmetrical half-bridge (AHB), in a single single bundle. Via the harmonized operation of the 2 phases, regulatory necessities can simply be met. As well as, the additional integration of all gate drivers and a 600 V excessive voltage start-up cell for the preliminary IC voltage provide and the licensed lively X-capacitor discharge allow a low exterior invoice of fabric (BOM) and element rely.

Based mostly on a novel zero-voltage switching (ZVS) HFB topology together with GaN-based gadgets, it brings class-leading effectivity throughout numerous line/load situations. Thanks to those options and inherent topology benefits, comparable to zero voltage switching and resonant power switch for transformer dimension discount, system designs utilizing XDPS2221 can obtain very excessive energy densities.

Furthermore, the brand new combo IC includes a synchronous PFC and HFB burst mode operation for the bottom potential no-load enter standby energy efficiency. The quasi-resonant multimode PFC stage is enhanced with automated PFC allow/disable performance and adaptive PFC bus voltage management to maximise common and lightweight load effectivity. Optionally, the built-in PFC operate will also be disabled, to help the use case with any sort of exterior PFC Controller.

The hybrid flyback stage makes use of peak present management operation for strong regulation and quick dynamic load response. To make sure ZVS operation beneath all situations, the hybrid flyback options ZVS pulse insertion, together with physique diode cross-conduction prevention in discontinuous conduction mode. Moreover, XDPS2221 additionally supplies easy-to-configure parameters by way of a graphical person interface to optimize system efficiency.

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