The UCC28019ADR is an integrated circuit (IC) component designed for controlling switch-mode power supplies (SMPS). It is specifically built for off-line power applications with input voltages ranging from 85V to 265V AC. This device integrates all the necessary circuitry for regulating the power supply in an efficient and reliable manner. Let's explore some of its prominent features.
1. Primary-side Control: The UCC28019ADR adopts primary-side control, eliminating the need for an optocoupler or secondary-side feedback circuitry. This simplifies the overall design, reduces component count, and enhances system reliability.
2. Quasi-Resonant (QR) Operation: The IC employs a quasi-resonant operating mode, which enables seamless switching transitions and reduces switching losses. This results in improved efficiency and minimizes stress on the power components.
3. Frequency Foldback: The UCC28019ADR incorporates a frequency foldback feature, which adjusts the switching frequency at light loads to decrease the power consumption. This technique helps optimize the efficiency throughout varying load conditions.
4. Soft-Start and Fault Protection: To ensure safe and reliable operation, the IC provides soft-start functionality, gradually ramping up the output voltage during startup. Additionally, it offers comprehensive protection features, including overvoltage protection, overcurrent protection, and overtemperature protection
