UCC3818ADG4

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Power Factor Correction (PFC) is a widely used technology for improving the efficiency and reliability of power supply systems. It is an integral part of power management systems, and is widely employed in consumer, industrial and automotive applications. The UCC3818ADG4 is a digitally enhanced, configurable power factor correction (PFC) controller IC, designed for use in high power AC/DC and DC/DC power supply systems. It offers a variety of features to support custom power system designs.

The UCC3818ADG4 is a mixed-signal PFC controller IC that offers digital control, digital protection, and analog control. The digital control consists of frequency-selectable emulations of analog controllers. This allows designers to achieve optimal performance at varying system load levels. On the protection side, the digital protection includes overvoltage, overtemperature, and undervoltage.

The UCC3818ADG4 is designed specifically for high power applications, offering an optimized frequency range and digital configuration. It features a wide operating voltage range of 6V to 42V and is well suited for AC/DC and DC/DC power supplies used in industrial, telecommunications, and automotive applications.

The UCC3818ADG4 uses a sinusoidal oscillator with a programmable frequency and varying phase lead-lag characteristics. It also supports phase-shift control as a method of power factor correction (PFC). Phase-shift control provides a high power factor by generating a smoother current waveform that is close to being in-phase with the mains voltage or DC voltage.

The UCC3818ADG4 output drive has been optimized to handle gate capacitances up to 2000 nF. Its output gate drive also features shoot-through protection and pro-active current limiting protection. This reduces the possibility of unwanted stress of external components and prevents any harmful effects caused by current surges.

The UCC3818ADG4 also offers various integrated safety features. This includes under-voltage lockout (UVLO), which ensures the device is in a known safe state when the input voltage is below a predetermined level. Overvoltage protection (OVP) limits the output voltage to a safe level to protect the system from being damaged by overvoltage or surge conditions.

The UCC3818ADG4 enables designers to reduce board space and improve system reliability. Its programmable parameters can be programmed to meet specific system requirements providing customers with increased control and flexibility. The UCC3818ADG4 is a cost-effective solution for power factor correction applications.

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