UCC28051DR Integrated Circuits (ICs)

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The power supply design based on UCC28051DR is an important part of PMIC - PFC (Power Factor Correction). PFC is an essential technology of modern DC/DC converters, especially in applications with high-power level. It plays an important role in the electricity energy saving and reliable energy conversion. The use of UCC28051DR enables high efficiency power supply design and excellent performance.

The UCC28051DR is a well-matched power factor correction IC specifically designed for synchronous rectification application. Its design optimizes the switching of the boost diode, limits the short-circuit current, realizes the ZVS under low output voltage and reduces the losses in turn-off interval. This IC integrates a high-side driver and a voltage-mode PWM controller in one device.

UCC28051DR can operate up to 200kHz with low external parts count. Moreover, the built-in variable slope control reduces audible noise, the constant current modulation technique ensures wide line regulation without sacrificing transient response and the programmable primary side current sense increases system stability. In a given application, it helps to reduce design cost and risk.

Well-designed power supplies based on PFC using UCC28051DR will make the converter more reliable, efficient and smaller. Additionally, the input current waveform and THDi of the system will be improved. The PFC controller integrates the necessary protection to ensure safe operation and the open loop and closed loop control technique allows excellent performance.

UCC28051DR is mainly used in the power switch system, voltage conversion, low noise power supply, DC-DC converter and other areas. Thus it can significantly reduce power loss and improve power conversion efficiency. For example, if the boost diode of traditional fly-back power supplies is switched with the UCC28051DR, the efficiency of the power supply can be improved by more than 5%.

The working principle of the UCC28051DR is very simple. The power switch system combines an input voltage, an output voltage and a power factor correction circuit. The voltage from the input of the power factor correction circuit is compared to a reference voltage. Depending on the difference between the two, the PFC circuit will adjust the voltage at the output. This enables the power factor correction circuit to keep the power factor of the AC power at “1” – achieving the maximum efficiency of the system.

Finally, the UCC28051DR is a powerful, cost-effective and reliable solution for building high-efficiency and high-power level power supplies. Its design optimizes the switching of the boost diode, limits the short-circuit current, realizes the ZVS under low output voltage and significantly improves the power conversion efficiency and power factor. Moreover, the built-in protection and PFC techniques ensure safe and reliable operation of the power supply. Therefore, the UCC28051DR is the ideal choice for PFC applications.

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