UCC2818DTRG4

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UCC2818DTRG4 is a high-performance PFC controller integrated circuit (IC) used for power factor correction (PFC). This device is optimized for Boost PFC (Power Factor Correction) applications and thus is ideally suited for use in offline cost-effective non-isolated AC/DC converters as well as Boost AC/DC or DC/DC converters. It can provide a soft start feature, supply overstress protection, as well as provide a current limit detection function to protect overloaded power supplies from harm. It is also ideal for applications that require maximum efficiency, faster dynamic response, lower cost, and higher power density.

UCC2818DTRG4 works by comparing the average inductor current with an internally controlled saw-wave voltage generated by the Pulse Width Modulator (PWM). When the inductor current exceeds the saw-wave voltage, the PWM signal is turned off and the inductor current is reduced. This process continues until the inductor current is equal to the saw-wave voltage, at which point the PWM signal is turned back on and the correction process begins again.

Boost PFC corrects two of the leading causes of power quality problems: voltage and current distortion. By controlling the current at the input of the AC/DC converter, the resulting output voltage remains constant, which improves power factor and efficiency, as well as reduces Input power distortion. This ensures that the converter is able to operate reliably and optimally, while meeting regulatory electrical standards like ENERGY STAR, 80Plus, and others.

UCC2818DTRG4 also helps the device to reduce switching losses by adjusting the width of the output pulses. This improves the device performance and helps to increase efficiency in a cost-effective manner. Additionally, this IC provides up to 4% improved power factor under global power supply line conditions. It is also capable of operating up to 165°C temperature, and features an overvoltage protection loop that automatically enforces a power-on reset after a stable voltage has been established.

UCC2818DTRG4 is extremely reliable and power efficient for use in offline cost-effective non-isolated AC/DC converters, making it an optimal choice for consumer electronics, industrial, and telecommunications applications. Its ability to reduce switching losses, improve the power factor, and provide safety protection make the UCC2818DTRG4 an excellent all-round PFC controller IC.

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