XDPS21071, Efficiency Enhanced with Primary Side ZVS
Dual MOSFET gate driver and
600V Self-Startup Unit Integration


Infineon Technologies announced on the 5th that it is launching the XDP digital power XDPS21071.

The XDPS21071 is a flyback controller that increases efficiency with primary side ZVS (zero-voltage switching). It is suitable for high-speed charging applications such as USB-PD or QuickCharge, and increases light-load efficiency in variable output applications.

The XDPS21071 integrates a dual MOSFET gate driver and a 600V self-startup unit. The primary side controller drives a flyback external high-voltage MOSFET and an external low-voltage MOSFET for generating pulses for the ZVS of this high-voltage MOSFET, and supports fixed-frequency switching up to 140 kHz.

Infineon's patented Forced-Frequency-Resonant (FFR) switching technique is implemented as a digital algorithm and can be configured by setting appropriate parameters (including UART ports) according to specific application requirements or international standard conversion efficiency requirements (such as EU CoC version 5 Tier 2 or DoE level VI).

Intelligent adaptive multi-mode operation, which switches to the appropriate operating mode (FFR, CrCM, burst mode, etc.) depending on line/load conditions, simplifies design and enables system optimization. ZVS operation minimizes switching losses and BOM cost increases while achieving optimal system performance. It also includes adaptive overcurrent protection and meets lead-free RoHS standards.

The XDPS21071 is currently available in a DSO-12 SMD package. The 45W USB-PD Type-C fast charger reference design (REF_XDPS21071_45W1) is scheduled to be available starting this March.