UCC2813-4

The UCC2813-4 is a high-efficiency, current-mode PWM controller designed by Texas Instruments for offline power supplies. It operates with a wide input voltage range from 8 V to 26 V, making it suitable for various applications including consumer electronics, industrial systems, and telecom equipment. The device features an internal 5.7 V regulated supply, eliminating the need for external biasing components and simplifying design. This controller includes built-in overvoltage protection (OVP), under-voltage lockout (UVLO), and thermal shutdown, ensuring reliable operation under fault conditions. Its current-mode architecture provides excellent line and load regulation, fast transient response, and inherent cycle-by-cycle current limiting, which enhances system stability and safety. The programmable frequency operation allows flexibility in optimizing efficiency and minimizing electromagnetic interference (EMI). The UCC2813-4 integrates a high-gain error amplifier and a precision reference, enabling accurate output voltage regulation across varying loads and temperatures. It supports both discontinuous and continuous conduction modes (DCM/CCM), allowing designers to tailor performance based on application requirements. Additionally, the IC features a soft-start function that limits inrush current during startup, reducing stress on components and improving overall reliability. Designed for use in isolated flyback converters, this IC offers a robust solution for low-to-medium power applications such as battery chargers, small adapters, and LED drivers. Its compact 8-pin DIP package ensures easy integration into space-constrained designs while maintaining thermal performance through efficient power dissipation. The device also includes a disable pin for remote control of the power stage, enhancing system-level flexibility. Texas Instruments’ UCC2813-4 is optimized for cost-effective, high-performance power conversion, combining advanced protection features with minimal external component count. It meets industry standards for safety and electromagnetic compatibility, making it ideal for global market deployment. With its proven reliability and ease of use, the UCC2813-4 serves as a preferred choice for engineers developing efficient and robust power solutions.