NCP1606BPG

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The NCP1606BPG Power Factor Correction (PFC) is an important component for many consumer and industrial applications such as LED/LCD display systems, medical equipment, home appliances, and light tracks. It essentially provides a clean, stable DC voltage from alternating voltage coming from the mains. The NCP1606BPG utilizes two different PFC topologies, Flyback and Boost; depending on the design parameters and application requirements, one or the other may be the more appropriate choice.

The NCP1606BPG control scheme is a fixed frequency, PFC boost converter with automatic parameter setting mode and current-mode control. It is an integrated PFC controller with an integrated fixed 400kHz optimized MOSFET gate driver to provide isolated digital dimming with enhanced robustness and high-precision power regulation. This PFC controller uses an external low-cost PNP transistor to replace the internal power MOSFET and has an adjustable loop current level for output power regulation instead of traditional current sensing configuration.

The NCP1606BPG features an easy-to-use design flow with automatic parameter setting mode, allowing a wide range of output power levels to be configured using the same device. It also offers a comprehensive set of protections, such as open loop, under-voltage lockout (UVLO), overload protection (OLP), and over-temperature protection (OTP), to ensure safety and reliability in any application.

The NCP1606BPG PFC controller can be used for multiple design applications such as SMPS (switch mode power supplies), AC-DC power converters, harmonic reduction and active power factor correction (APFC) regulators. It can support power levels up to 700 W and offers a typical peak efficiency up to 95%.

The working principle behind the NCP1606BPG is based on the principle of power factor correction (PFC), where a circuit reduces the reactive power drawn from the mains while increasing the real power. The PFC stage is generally composed of an active switch, a diode, and an inductor, and the NCP1606BPG controller regulates the switch on/off times to accomplish the required power factor correction.

In SMPS or AC-DC power converter applications, the NCP1606BPG controller regulates the power factor to near unity. In an active power factor correction (APFC) regulator, the NCP1606BPG controller operates with a constant frequency mode, energizing the inductor during the on-time of the active switch and storing energy in the inductor during the off-time.

The purpose of the NCP1606BPG controller is to provide the target power factor, highest efficiency, and optimal stability. The power factor can be given as a filter capacitor connected in parallel to the incoming line, which compensates the reactive current generated in the inductor, thus resulting in a power factor near unity.

To ensure the highest efficiency, the PFC boost circuit is controlled on a constant frequency mode, which allows the switching losses to be reduced nearly to a minimum. The NCP1606BPG controller uses an optimized fixed-frequency control concept to ensure optimal stability and an advanced digital dimming algorithm to minimize the input current total harmonic distortion (THD) to less than 3%.

In conclusion, the NCP1606BPG is an ideal PFC controller for multiple applications, including SMPS (switch mode power supplies), AC-DC power converters, harmonic reduction, and active power factor correction (APFC) regulators. It offers a comprehensive set of features and protection for safety and reliability, and its fixed 400kHz optimized MOSFET gate driver allows for isolated digital dimming with minimal distortion. The NCP1606BPG has an adjustable loop current level for output power regulation, and its utilizes a constant frequency, PFC boost converter with fixed 400kHz optimized MOSFET gate driver, providing an efficient, competitive, and robust solution to many consumer and industrial applications.

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