Infineon Technologies XDPS21081 ZVS Flyback Controller is a digital PWM device for high-density adapter applications based on Forced Quasi-Resonant (FQR) ZVS flyback topology. The flyback controller provides low line QR and high line FQR Zero Voltage Switching (ZVS) operation. This XDPS21081 controller exhibits advanced algorithms for multi-mode operation and protection features with an integrated ASSP digital engine. The IC supports the highest design flexibility in the application by means of an advanced set of configurable parameters and state machines, which supports very dedicated system dimensioning. This XDPS21081 controller integrates a One-Time-Programmable (OTP) unit to provide a selective set of configurable parameters, that can be matched to dedicated system design.