UCC3818ANG4

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Power factor correction (PFC) is an important component in power electronics and one of the most widely used components in the industry is the UCC3818ANG4 IC. It is a high performance PFC device with operating frequency range from 10kHz to 500kHz and integrated PFC and protection functions.

The main purpose of PFC is to improve the power factor and reduce power losses. In most AC/DC power supplies, the load current is not in phase with the input voltage and a reactive current is generated, which increases the power losses. Power factor correction is used to optimize the efficiency and regulation of AC/DC converters by reducing the reactive current. The UCC3818ANG4 helps to reduce reactive current and improve the power factor.

The UCC3818ANG4 uses a two-bridge LLC resonant converter circuit for PFC and is mainly used for mid-range to high power applications. The two-bridge LLC resonant converter supports high efficiency power conversion and is capable of remarkable performance over a wide output power range. The two-bridge LLC converter also offers better flexibility in the design of power supply control, power factor correction, and EMI filter.

The UCC3818ANG4 is a current mode PFC controller and uses a variety of control techniques to achieve high power factor and low total harmonic distortion (THD). It has a low quiescent current and low harmonic cascading of output voltage as well as comprehensive protections. The UCC3818ANG4 also features an adaptive peak current control technique that provides a wide range of output power operation for increased efficiency in various load conditions. Moreover, it can detect current and voltage overshoots and reduce the conduction losses of the power MOSFETs.

Therefore, the UCC3818ANG4 is an ideal IC for use in power factor correction applications due to its high performance and variety of features. It can be used in a wide range of applications, such as AC/DC converters, power supplies, high power lighting, and motor drive systems.

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