UCC2813-2

The UCC2813-2 is a high-efficiency, current-mode PWM controller designed by Texas Instruments for use in offline power supplies. It features an internal 7.5V regulator, enabling operation from a wide input voltage range of 8 V to 30 V, making it suitable for applications requiring robust performance across varying supply conditions. The device incorporates a precision reference and a high-gain error amplifier, ensuring stable and accurate output regulation under load and line variations. This controller supports both continuous and discontinuous conduction modes (CCM and DCM), offering flexibility in design for different power levels and efficiency requirements. Its built-in overcurrent protection with latch-off functionality enhances system reliability by shutting down the converter during fault conditions, preventing damage to downstream components. Additionally, the UCC2813-2 includes soft-start circuitry that limits inrush current during startup, reducing stress on the power supply and improving overall system longevity. The UCC2813-2 offers a programmable frequency range from 20 kHz to 100 kHz, allowing designers to optimize efficiency and minimize electromagnetic interference (EMI). A synchronization pin enables external clocking for multi-phase or noise-sensitive applications, enhancing system integration capabilities. The device also includes a comprehensive set of protection features such as thermal shutdown, undervoltage lockout (UVLO), and overvoltage protection (OVP), which collectively ensure safe operation in harsh environments. Designed for simplicity and ease of implementation, the UCC2813-2 requires minimal external components, reducing bill-of-materials cost and board space. Its compact 8-pin DIP package facilitates straightforward PCB layout while maintaining thermal performance through efficient heat dissipation. The controller is ideal for isolated and non-isolated flyback, forward, and buck converters used in consumer electronics, industrial equipment, and telecom power systems. Applications include battery chargers, LED drivers, small appliances, and low-power adapters where high efficiency, compact design, and reliable operation are critical. By combining advanced control algorithms with robust protection mechanisms, the UCC2813-2 delivers a versatile and dependable solution for modern power conversion needs.