PFS7327H

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PMIC - PFC (Power Factor Correction) is a technology used to adjust the amount of power being drawn from a power source so that it meets certain electrical requirements. As such, it forms an important part of modern electronics and is used in a variety of applications. One of the solutions for Power Factor Correction (PFC) is the PFS7327H, a high efficiency integrated power factor controller. This article will explain the application field and the working principle of the PFS7327H.

The PFS7327H is an integrated device designed to provide active PFC to switch mode power supplies in a wide range of applications. This includes applications such as office equipment, PCs and home appliances as well as lighting and server systems. The device offers a high power factor over the entire load range and supports high efficiency to enhance energy savings. It also provides a wide AC input range, allowing it to be used in a variety of different countries. Additionally, the device comes with an integrated analog or digital dimmer control input, making it suitable for applications such as LED lighting systems.

The working principle of the PFS7327H is based on the Boost PFC topology. This topology consists of a single-stage, non-isolated Boost converter with synchronous rectification. The Boost converter takes in an AC input voltage and internally converts it to a DC voltage. It then uses the PFC algorithm to adjust the duty cycle of the main switch to control the current delivered to the output. This algorithm consists of two main control loops. The voltage loop is used to control the output voltage, while the current loop is used to control the power factor so that it is the closest possible to 1. The Boost converter also includes a Power Limit Control (PLC) circuit which sets the maximum amount of power that can be drawn from the input source.

In summary, the PFS7327H integrated circuit from Power Integrations is a high efficiency solution for Power Factor Correction. It is designed to be used in a wide range of applications, from server systems to LED lighting systems. Its working principle is based on the Boost PFC topology and consists of a single-stage non-isolated Boost converter with synchronous rectification and two control loops. Additionally, the device includes a Power Limit Control (PLC) circuit to limit the amount of power that can be drawn from the input source.

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