Infineon Technologies (Korea CEO Seung-soo Lee) has launched a PFC+hybrid flyback combo IC for GaN-based USB-C adapters and chargers, meeting the demands of the adapter and charger market for low system costs, small form factors, and high power capacity.


Infineon announced on the 20th that it is launching the new XDP™ digital power XDPS2221.

The highly integrated combo controller IC XDPS2221 for USB-PD supports high-power designs with a maximum output voltage of 28V with a wide input and output voltage range.

The XDPS2221 integrates an AC-DC PFC controller and a DC-DC hybrid flyback controller (HFB), also known as an asymmetric half-bridge, into a single package.

Through the harmonious operation of these two stages, regulatory requirements can be easily met.

In addition, it integrates all gate drivers for initial IC voltage supply, a 600V high-voltage start-up cell, and certified active X-capacitor discharge to reduce the external BOM and number of components.

By adopting an innovative Zero Voltage Switching (ZVS) HFB topology with GaN-based devices, best-in-class efficiency is achieved under various line/load conditions.

In addition, system designs using the XDPS2221 can achieve very high power density by reducing transformer size through zero-voltage switching and resonant energy transfer.

This new combo IC features synchronous PFC and HFB burst mode operation, thereby minimizing no-load input standby power.

The quasi-resonant multimode PFC stage can be enhanced using the automatic PFC enable/disable function, and adaptive PFC bus voltage control maximizes average and light-load efficiency.

If an external PFC controller is used, the internal PFC function can be optionally disabled.

The hybrid flyback stage achieves robust regulation and fast dynamic load response by using peak current control action.

To ensure ZVS operation under all conditions, the hybrid flyback provides a ZVS pulse insertion function that includes preventing body diode cross-conduction in discontinuous conduction mode.

In addition, the XDPS2221 allows for the optimization of system performance by easily configuring parameters through a graphical user interface.

The new XDP digital power combo controller XDPS2221 for PFC boost and DC-DC HFB is available in a DSO-14 package and is currently accepting orders.