XDPS2201 controller for high-density AC-DC power supply,
Zero voltage/current switching under various conditions
Suitable for designs using planar transformers


Infineon announced on the 8th that it is adding an ASSP product based on an asymmetric half-bridge flyback topology to its 'XDP™' product family. The 'XDPS2201', a highly integrated multi-mode digitally configurable hybrid flyback controller, is available in a DSO-14 SMD package and is suitable for high-density AC-DC power supplies such as USB-PD rapid chargers and adapters.

The XDPS2201 combines the simplicity of a traditional flyback topology with the performance of a resonant converter, enabling natural soft switching and reducing switching losses in designs operating at high switching frequencies. It also provides zero-voltage switching (ZVS) and zero-current switching (ZCS) across AC line input, load conditions, and variable output voltages, making it suitable for designs operating at high frequencies and utilizing planar transformers.

Intelligent adaptive digital algorithms optimize performance based on a variety of output voltage, load, and line input conditions. Support for multi-mode operation selects the most appropriate mode for each condition, maximizing efficiency under all conditions. It also includes numerous protection features, including brown-in/out, dual-level overcurrent, output overvoltage and undervoltage, and overtemperature detection.

'CoolMOS™' MOSFETs enable maximum system efficiency and power density. The XDPS2201 uses an asymmetric control scheme to drive both high-side and low-side MOSFETs. By integrating the high-side driver, it eliminates up to 20 external components, reducing the bill of materials. This topology enables snubber-free designs and reduces component count by enabling the use of high-voltage MOSFETs of 500 V or higher.

The XDPS2201 hybrid flyback controller, which achieves up to 93.8% efficiency and an average of over 92% across a wide range of AC line and load conditions, is available for ordering now.