NCP1654BD200R2G Integrated Circuits (ICs)

Looking to improve efficiency and reduce losses in an AC to DC power conversion system? Power Factor Correction (PFC) is the solution. While PFC terms and technologies may be confusing, the NCP1654BD200R2G from ON Semiconductor is a perfect fit for applications requiring basic peak current mode PFC control with high performance. This article will discuss the application field of the NCP1654BD200R2G, as well as its working principle.

Application Field of the NCP1654BD200R2G

The NCP1654BD200R2G is a 100V peak current mode PFC controller, specifically designed to enhance the efficiency in an AC to DC power conversion systems. It features a 300 KHz fixed frequency current mode structure, cycle-by-cycle current limiting, integrated soft start, and frequency folding to protect against short circuits and open loops. This makes it an ideal solution for high-power AC-DC converters when efficiency and protections with low external parts count are essential. Its ability to generate an output current accurately proportional to its input voltage gives it a much higher overall efficiency and power factor than traditional alternatives.

The NCP1654BD200R2G is perfect for a wide range of applications, from 40W to 200W applications. These applications are most likely found in the electronics and IT industries, such as wireless communication devices, desktop/mini/notebook computers, industrial control systems, and home appliances. The device can also be used in medical systems and automotive applications, due to its high voltage compatibility.

Working Principle of the NCP1654BD200R2G

The NCP1654BD200R2G features peak current mode control, which determines the amount of energy delivered to the output. This is achieved by detecting the inductor current peak value and controlling the amount of energy needed by the converter’s output. This simplifies power stage design, as the design is independent of the primary side of the PFC circuit. The device requires a minimum of external components to facilitate quick design, reduced cost, and small form-factor.

The NCP1654BD200R2G also features built-in frequency jittering to prevent maximum power limit exhaustion, as well as sophisticated fault protection. The device starts in a low-power burst mode, using a slow start/-up cycle of about 120ms, instead of a linear start-up. This reduces the input current peak and improves the power factor during start-up.

The NCP1654BD200R2G also protects against critical conditions, such as overvoltage, open loop, short circuit, and over temperature. The over-voltage protection (OVP) circuitry is triggered if the output voltage reaches a predetermined threshold and the current-limit circuitry cycles off if the output current reaches a fault level.

Conclusion

The NCP1654BD200R2G from ON Semiconductor is a PFC controller designed for peak current mode control, designed for a range of high power AC-DC conversion applications. Its peak current mode control allows for a simpler power stage design that operates independently of the primary side of the PFC circuit, making it ideal for applications where efficiency and protection are essential. The device also has built-in frequency jittering and sophisticated fault protection capabilities, making it an excellent choice for applications requiring basic peak current mode PFC control with high performance.