ON Semiconductor NCP1653 Power Factor Controller

Introducing the NCP1653, a highly integrated and feature-rich Power Factor Controller (PFC) from ON Semiconductor, designed to deliver an efficient and compact solution for AC-DC power supplies. This controller is specifically engineered to enhance the power factor of electronic systems that connect to mains and operate in continuous conduction mode (CCM). It is an ideal choice for a wide range of applications, including but not limited to, offline power supplies for desktop computers, televisions, and environmentally friendly lighting solutions.

The NCP1653 stands out with its ability to simplify the design of PFC stages across a broad spectrum of power levels. It incorporates numerous features to improve system performance and reliability. The device integrates a high-voltage startup circuit, which ensures a quick and energy-efficient start-up, and a true power limit feature that prevents power overshoots during transient conditions, thereby enhancing system safety and longevity.

At the heart of the NCP1653 is an innovative Current Controlled Frequency Fold-back (CCFF) technique that significantly reduces the switching frequency during light load conditions. This results in improved efficiency and reduced electromagnetic interference (EMI), which is crucial for meeting stringent energy-saving standards and EMI regulations. The PFC controller also features brown-out protection, which safeguards the system against undervoltages, and an open-loop protection to prevent runaway output voltages in the event of a feedback loop failure.

ON Semiconductor has equipped the NCP1653 with an adjustable overvoltage protection mechanism that allows designers to set precise thresholds, ensuring tailored protection for their specific application needs. Furthermore, the device's soft-start function minimizes inrush current, thereby reducing stress on power components at startup.

The NCP1653 is available in a compact PDIP-8 package, making it suitable for space-constrained applications. Its robust design and comprehensive suite of features make it a smart choice for engineers looking to optimize power efficiency and performance in their AC-DC power supply designs.

For detailed specifications, application notes, and further information, engineers and designers are encouraged to visit ON Semiconductor's official website or contact their local sales representative.