Flyback controller includes primary-side regulation and peak power mode

The UCC2863x, from Texas Instruments, targets high-power, primary-side regulated flyback converters. The ability to work in both CCM and DCM makes the device ideal for applications with a broad power range. The peak power mode enables transient peak power delivery up to 200% of nominal rating, with only a 25% peak current rise, maximising transformer utilisation. The transformer bias winding is used to sense output voltage for regulation, and for low-loss input voltage sensing. Advanced sampling techniques enable CCM operation and deliver great output voltage regulation performance for opto-coupler-less designs at power levels at and above 100W. The device has been developed for ease-of-use and includes many features to allow a wide range of designs. Extensive protection features are incorporated to simplify system design.