UC3855BNG4

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Power factor correction (PFC) continues to be essential in many electronic systems, especially in applications with high-power density. In order for power systems to operate without consuming too much energy and not generating too much electromagnetic interference (EMI), proper use of power factor correction is required. The UC3855BNG4 offers an integrated power factor correction (PFC) feature that allows designs to meet both required current and voltage standards.

The UC3855BNG4 is a monolithic integrated PFC controller that provides exceptional protection, control and operation. It offers maximum safety and protection in most applications, and is suitable for low-power and compact designs. The integrated PFC feature means that designs can meet both required current and voltage standards. With its advanced design, the UC3855BNG4 also provides excellent dynamic response for a wide range of input, output, and line conditions.

The UC3855BNG4 is designed to operate as a continuous conduction mode (CCM) boost phase shift power factor correction circuit. This design provides excellent power factor correction and allows for wide range of input and output power requirements. The UC3855BNG4 operates from 4.6 to 70 VDC, making it ideal for applications in harsh environments with wide input selection.

The UC3855BNG4 features an advanced chipset, which includes an accurate voltage reference, an output voltage feedback voltage, and a high current active peak loop to ensure a high level of accuracy and stability. The UC3855BNG4 contains a number of protection features, such as overcurrent protection, short circuit protection, overvoltage protection, and brown-out protection.

The UC3855BNG4 has a simple yet highly effective control architecture. It operates with the use of four main control signals: voltage sense, current sense, boost control, and operating mode. The voltage sense input is used to compare the output voltage to the internal voltage reference, allowing for rapid voltage regulation. The current sense input is used to regulate the current in the boost converter, providing a high degree of control. The boost control signal is used to regulate the current in the boost converter and determine the peak value. Lastly, the operating mode input is used to determine the mode of operation, allowing for various dynamic strategies.

The UC3855BNG4 can be used for a variety of applications, such as LED drivers, power supplies, battery chargers, and more. Its wide input voltage range, efficient power factor correction, and advanced protection features make it ideal for power systems in harsh environments or high density power designs. With its robust design, outstanding features, and reliable performance, the UC3855BNG4 is an excellent power factor correction choice.

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