The UCC256404DDBR is an integrated circuit (IC) component that belongs to the UCC25640 family of advanced PFC (Power Factor Correction) controllers. Developed by Texas Instruments, this IC is specifically designed for AC-DC power supplies and LED lighting applications. With its high level of integration and advanced features, the UCC256404DDBR offers an efficient and reliable solution for power factor correction.
One of the key features of the UCC256404DDBR is its ability to achieve excellent power factor correction by utilizing a mixed-mode control algorithm. This algorithm allows for continuous conduction mode (CCM) operation, which ensures improved power factor and low harmonic distortion. The device also offers an inherent frequency jittering feature, reducing electromagnetic interference (EMI) noise.
The UCC256404DDBR integrates various protection mechanisms to ensure the safety and reliability of the power supply. These include overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown protection. These protections safeguard the IC and connected components from potential damages caused by abnormal operating conditions.
To simplify the design process, the UCC256404DDBR incorporates a number of built-in features. For instance, it includes an internal high-voltage start-up switch, eliminating the need for an external startup circuit. Additionally, the device supports valley switching, a technique that enables soft-switching operation and reduces the switching losses
