UCC28517N

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Power Factor Correction (PFC) is a technique used in power electronic circuits to improve the voltage and current quality of an electrical system. The most common application is in switching power supplies, but other applications such as high power LED lighting and motor drives also use PFC. The power factor controller (PFC) is an electronic component that regulates the impedance, voltage and current of an AC power system. The PFC controller works by controlling the direction of power flow within the system and preventing excessive current, which can cause damage to electrical components.

The UCC28517N is an integrated power factor correction (PFC) controller, designed to reduce the amount of power dissipation from power electronics. It is designed with a patented high-voltage MOSFET driver enabled by a 230VAC input voltage range, capable of delivering up to 500mA output current for low power dissipation. This eliminates the need for external components such as inductors and transformers, enabling the PFC controller to be integrated into a single package for a more compact application.

The UCC28517N utilizes a single power factor controller in the form of an independent current-mode pulse width modulator (ICM PWM). It offers precise control of the inductor and output voltage and operates at a maximum peak current of 200mA. It also features an adjustable soft-start threshold to minimize inrush current and an adjustable constant-on-time (COT) to optimize power supply efficiency. Also, the integrated gate driver allows for a stable output, as well as a fast response to changing input supply voltages.

In terms of system level performance, the UCC28517N integrates a range of features to offer improved system efficiency and power factor performance. It includes an adjustable current sense range that controls the amount of electrical energy delivered to the load, as well as an adjustable frequency for power factor compensation. This helps to reduce audible noise and to minimize the size of the required external components. Its low THD design increases its power efficiency and power factor, while its low output ripple reduces the effects of electrical noise.

The UCC28517N contoller is designed for use in a wide range of low power applications such as LED lighting, air conditioning and motor drives. In LED lighting applications, the UCC28517N can reduce the complexity of power supply design by providing an integrated solution for PFC and LED constant current drive. In motor drive applications, it helps to reduce the power losses and to maximize the efficiency of the system.

The UCC28517N provides a range of benefits to power electronic circuit designers, offering improved performance and reliability while reducing the size and complexity of the design. It is a cost effective solution for power factor correction, delivering excellent system-level performance and increased power savings. With its integrated features and reliable performance, the UCC28517N is a great choice for any power electronics design.

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