UCC38051PG4

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Power Factor Correction (PFC) is an important technology in the design of power management circuits. The UCC38051PG4 is an integrated stage PFC controller designed for applications where a compromise between cost and performance is required. It is equipped with a 200V current-mode PFC controller that is designed to be used in SMPS applications with a wide variety of switching frequencies and power levels.

The UCC38051PG4 operates with a dual-mode loop. At start-up, it operates in fixed mode, providing output voltage accuracy and excellent line and load regulation. Once the PFC circuit is in active operation, the fixed-mode loop gives way to an adaptive mode, which uses an external R4 voltage to adjust the loop parameters and deliver improved current-mode control accuracy.

One of the key features of UCC38051PG4 is its ability to reduce transition-induced switch resonant frequencies and electromagnetic interference (EMI) significantly. This is achieved by sensing the input voltage and output current and temporarily varying the switching frequency to transition between constant-on-time (COT) or constant-frequency-ratio (CFR) operation. In addition, the device features pulse-by-pulse current limit protection and auto-restart if the load short-circuits. This helps to reduce component costs and system complexity.

The UCC38051PG4 is suitable for applications ranging from 500W to 2000W such as AC-DC adapters, DC-AC inverters, and UPS systems. It is available in a 20-lead HTSSOP package with exposed pad that dissipates heat. It is also compatible with various voltage regulator ICs, including the UCC28062, UCC38762, and UCC39200, so that a complete system can be developed with minimal component requirements.

In summary, the UCC38051PG4 PFC controller is an excellent choice for designs requiring a compromise between cost and performance. Its dual-mode loop, EMI reduction, current limit protection, and auto-restart functions make it an ideal solution for various SMPS applications with power levels ranging from 500W to 2000W. Its compatibility with a wide range of regulator ICs makes it a great option for creating a complete system with minimal component requirements.

The specific data is subject to PDF, and the above content is for reference