UCC28019ADR Integrated Circuits (ICs)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Power factor correction (PFC), refers to an electronic device or circuit which corrects for incorrect power factor in AC-powered equipment being driven by non-linear loads. PFC circuits are mainly used in large industrial or commercial applications where power supplies need to be robust, efficient, and reliable. One example of a PFC circuit is the UCC28019ADR, a buck PFC controller from Texas Instruments that has been designed to provide total power factor correction from 85V to 375V.

An AC power supply that has a non-unity power factor (for example, when supplying power to an inductive load) will deliver more wattage than the wattage requested by the load, since the power supply must deliver an ‘apparent’ rather than ‘true’ wattage. The compressor motor in a refrigerator is an example of a non-linear inductive load that necessitates the need for power factor correction. A PFC circuit such as the UCC28019ADR can be used to pre-condition this power so that the power drawn by the load is the same as the power delivered by the supply.

The UCC28019ADR is an advanced, bi-level, buck PFC controller that combines a wide input voltage range (85V to 375V) and high output power with high efficiency. It also offers users a low start-up current,precise current limitation and superior line and load transient response, as well as a frequency-fold back mode for improved light-load efficiency. The UCC28019ADR chip is designed to be integrated into a single-stage power factor correction (PFC) boost converter, the most common type of PFC circuit used in AC-DC converters.

A single-stage PFC boost converter uses two switches (one PFC switch, and one diode) and two inductors (the PFC inductor, and the output inductor/smoothing inductor) to convert the AC current into DC current. As the input voltage is AC and not DC, the main switch must turn on and off to allow AC current to flow in pulses and create DC current, which is then stored until it is needed. This is achieved by controlling the on/off times of the switches, and by controlling the amount of current that is stored on the inductors. The output of the circuit is usually a DC voltage with only a small amount of ripple, depending on the inductors used in the circuit.

The UCC28019ADR chip is used to control the on and off times of the switches, the current limit and ripple, and to improve the overall power factor of the power supply. It achieves this by using a negative voltage feedback loop that directly measures the current flowing through the PFC switch. This feature allows the chip to always be aware of the output current and voltage levels, as well as the input current levels, and to use this data to adjust the power parameters (such as the on and off times of the switches). The chip also contains features that allow it to protect against over-voltage, under-voltage, and short-circuit conditions.

In summary, the UCC28019ADR is an advanced buck PFC controller designed for use in single-stage PFC boost converters. It combines a wide input voltage range with high efficiency, precise current limitation, and outstanding line and load transient response. It also offers users protection from over-voltage, under-voltage, and short-circuit conditions.

The specific data is subject to PDF, and the above content is for reference