UCC28019D

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UCC28019D is a high performance current mode controller for power factor correction (PFC). It is designed to provide a low cost, reliable solution for all types of lighting, AC-DC and DC-DC power converter applications. The device integrates a full wave rectifier, PFC controller, current sense amplifier, and core reset circuit, as well as a pulse width modulation (PWM) generator and a built-in overvoltage protection circuit. This device has excellent performance characteristics due to its low switching frequency in the switching regulator, power background noise reduction and low quiescent current.

UCC28019D is based on a peak current control technique in which an average current reference and peak current sense amplifiers are used to monitor the current levels during steady state and dynamic operation of the power conversion process. The device also features two separate input voltage signals that allow the user to configure the PFC stage for a wide variety of output power levels. The UCC28019D can be used for both single and multiple phase power supplies up to 350V, and provides a 25 kHz switching frequency from which the user can adjust according to the power loading.

The device works in a current-mode control scheme which consists of three main functional parts. The PFC controller is responsible for generating a switching control signal to the power switches in order to correct the output voltage waveform from the rectifier stage. The current sense amplifier monitors the current flowing through the inductor and generates a control signal for the controller proportional to the current level. Finally, the Pulse Width Modulation (PWM) generator is used to generate a pulse train that is used to control the switching of the power switches.

The main benefits of using UCC28019D in PFC applications are the low switching frequency, which reduces the electromagnetic interference (EMI) caused by the switching, the low power loss during the power conversion process, and the low quiescent current consumption, which improves overall efficiency of the system. Additionally, the peak current control technique can improve the power factor by actively adjusting the average current level to create a more efficient waveform. In addition, this device integrates an extra overvoltage protection circuit to protect the driver and the system from overvoltage events caused by the rectifier.

UCC28019D is a highly integrated and cost effective solution for many power conversion applications. By utilizing its broad range of high performance features, this device can be used to design efficient power conversion solutions for a variety of applications including lighting systems, motor control systems, AC-DC and DC-DC converters, and many others.

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