UCC2818DWTR

UCC2818DWTR is an advanced-featured controller designed for power factor correction (PFC) applications. It achieves power factor correction by measuring the input current of an AC/DC power supply and controlling the output of the switching regulator accordingly. UCC2818DWTR provides an integrated solution for a power factor correction stage that typically requires several discrete components. It operates from an input voltage range of 5V to 24V and provides a constant output power up to a 90W of power dissipation. Additionally, UCC2818DWTR provides an internal sync switch which enables synchronous rectification for increased efficiency.

The UCC2818DWTR controller offers superior performance by employing a current-mode feedback control loop to regulate the input current to the desired level. The output voltage of the switching regulator is regulated by a voltage control loop. UCC2818DWTR includes a complete set of features including soft-start, soft-stop, under-voltage and over-voltage protection, and frequency responses which can be adjusted depending on the power system design requirements. The current-mode control loop is based on a fixed frequency triangular wave signal that is used to generate an average of the rectified signal. This mechanism is used to improve the control of the input current over the entire operating range.

UCC2818DWTR requires the use of externals components to configure the desired output voltage, current and power dissipation. The external circuitry typically consists of low side and high side MOSFETs, gate drivers and output capacitors. UCC2818DWTR supports a wide range of switching frequencies, enabling optimized designs for various power system requirements. In addition, the device offers very low input THD (Total Harmonic Distortion), achieving a high power factor correction efficiency of up to 99%.

UCC2818DWTR can be used in a wide range of AC/DC power supplies, such as notebook computers, personal computers, TVs and other electronics, to provide extremely efficient power factor correction. The device helps to reduce the input current waveform, reduce power consumption and extend the life of the power supply. UCC2818DWTR is also suitable for LED lighting applications, supporting dimming control and offering flexibility to optimize LED driver designs.

UCC2818DWTR is a highly efficient solution for any power factor correction application. The device is easily configurable and offers superior control performance, reducing the number of external components and enablinghighly efficient power conversion.