FAN4801SNY

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Power Factor Correction (PFC) is an important element of electrical power systems which are designed to ensure the power factor of an AC load remains constant. While high power factor is a requirement for modern-day power systems, it allows more efficient use of electrical power. In electronics, the FAN4801SNY Power Factor Controller (PFC) is one such device that can be used to regulate the power factor of a system.

At its core, the FAN4801SNY PFC is an active power factor correction (APFC) based linear regulator, offering a constant current and constant voltage output from a single-phase AC or DC-input supply. This makes it ideal for AC-input applications, such as lighting equipment, LED lamps and LED displays. The FAN4801SNY is designed to operate with a wide input voltage range, of 85VAC to 305VAC, allowing it to be deployed in a variety of environments. In addition, the FAN4801SNY PFC controller is equipped with several functions, such as input over-voltage protection and output current limiter, which all help to reduce component stress and minimize the risk of fire or other mishaps.

The working principle of the FAN4801SNY PFC controller is based on a switch-mode power topology with a boost converter, which is fed by a full-bridge rectifier and provides a constant DC output voltage. The FAN4801SNY PFC controller uses the Synchronous Rectifier (SR) technique for high efficiency and fast response. The SR circuit configuration not only reduces the power losses due to switching, but also improves the power factor. The FAN4801SNY PFC controller also features an internal high-gain Band-Gap Voltage Reference, enabling it to maintain a constant output voltage with a wide range of load currents. During AC line transients, the FAN4801SNY PFC controller can operate as an error amplifier and deliver a maximum of 0.005 per cycle of output voltage. This allows the PFC controller to meet the accurate power factor requirements of many AC-input applications, while also providing a cost-effective solution.

With its advanced features, the FAN4801SNY PFC controller is ideal for a wide range of applications, including LED lighting, DC/DC power supplies, solar power converters and trains. The FAN4801SNY PFC controller also offers excellent EMC performance, as it meets the electromagnetic compatibility (EMC) requirements of both EN55105 and EN55022. Additionally, with its slender and compact design, the FAN4801SNY PFC controller can be installed in any environment, making it a great choice for various applications.

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