Texas Instruments UCC28070 Two-Phase Interleaved CCM PFC Controller UCC28070PWG4

The UCC28070 is a two-phase interleaved continuous conduction mode (CCM) power factor correction (PFC) controller from Texas Instruments. It operates with a switching frequency range of 30kHz to 300kHz, designed for applications requiring efficient power conversion. The device features interleaved average current-mode PWM control, which enhances current matching and reduces input and output ripple currents, facilitating easier EMI filtering. Key functionalities include advanced current sensing for improved efficiency, synchronization capability to an external clock, and a highly-linear multiplier output with internal voltage feed-forward for near-unity power factor. The UCC28070 also offers programmable features such as maximum duty-cycle clamp, frequency dithering for EMI reduction, soft-start, and peak current limiting. Protection mechanisms include undervoltage lockout, output overvoltage detection, and open-loop protection. This controller is suitable for various applications, including air conditioning systems, telecom power supplies, electric vehicle charging infrastructure, and professional audio equipment. The UCC28070 is available in a 20-pin TSSOP package, making it a compact solution for high-performance power management needs.