NCP1601ADR2

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Power factor correction (PFC) is an important factor of electricity management, enabling the efficient use of electricity in residential and industrial applications. The most important factor in PFC is NCP1601ADR2, a switching regulator combining a PFC boost converter with an ultra-low quiescent current quiescent voltage regulator.

The NCP1601ADR2 is designed to correct the power factor and to reduce harmonic distortion emitted to the mains by electronic electronic systems, such as PCs and laptops, air conditioners, and TV sets. It is based on a flyback topology and it comprises two main stages, a Pulse Width Modulation (PWM) PFC and a Critical conduction mode (CCM) PFC.

The PWM PFC stage is the most common type of PFC, allowing the control of the current in the inductor and the input line. It works by producing a constant voltage output for a given line input. To achieve this, the PWM controls the on/off state of the switching elements, adjusting the power factor and harmonic distortion level in the input AC line. The PWM PFC stage also ensures high efficiency by avoiding switching losses, as it can shut down the power devices at no-load conditions.

On the other hand, the CCM PFC offers more accuracy than the PWM PFC and better performance at very light and low load conditions. It works with constant on-time by monitoring the input voltage level, charging and discharging the energy storage capacitor during each switching cycle. It also features skip mode operation for high efficiency at light-load conditions and soft start for silent in-rush current elimination.

In addition, the NCP1601ADR2 incorporates a quiescent current regulator which greatly reduces the quiescent current consumption and supply voltage ripple, while achieving good transient response. This is important for consumer applications, which usually require very low quiescent current consumption.

The NCP1601ADR2 is suitable for a variety of applications such as PCs and laptops, flat-panel displays, air conditioners, and other consumer electronics. It is designed to work with an input voltage range of 85-265VAC and an output voltages range between 8V and 24V, allowing for the control of electronic loads up to 1.2A.

The obvious benefit of NCP1601ADR2 is its very low quiescent current, which enables the integration of a high PFC performance in small size electronic products. In addition, its high power density, wide input voltage range, excellent EMC performance and high efficiency makes it an ideal solution for all kinds of residential and industrial applications.

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