UCC2817AN

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UCC2817AN is a Pulse Width Modulation (PWM) controller for use in dc-dc power supply applications such as Power Factor Correction (PFC). It is typically used to control the output voltage and current in a power supply to ensure an optimal output waveform. It is designed to be suitable for use in a variety of applications, including those with high power and low noise requirements.

The primary purpose of the UCC2817AN is to generate a pulse width modulated (PWM) waveform from an incoming AC line power. This waveform is then used to regulate the voltage and current in the power supply, resulting in an optimally stable power supply. The UCC2817AN includes features that allow the PWM waveform to be adjusted to the exact requirements of the application.

The key features of the UCC2817AN include: current-mode operation with variable on-time control. This allows the output voltage and current to be precisely controlled, resulting in optimized performance and maximum efficiency. The UCC2817AN also includes adjustable dead time, which helps reduce switching losses. Additionally, the integrated power factor correction (PFC) circuit reduces the reactive current and increases the efficiency of the system.

The working principle of the UCC2817AN is based on the pulse width modulation (PWM) method. In this method, the incoming AC line power is chopped up into a series of pulses of different widths. These pulses, when filtered, produce an output voltage that is proportional to the on-time of the PWM signals. By controlling the on-time of the PWM signals, the output voltage and current can be precisely adjusted to the exact requirements of the application. This includes features such as adjustable current limit, output voltage limit, and adjustable slew rate control.

In summary, the UCC2817AN is an excellent choice for dc-dc power supplies due to its current-mode operation, adjustable dead time, and power factor correction capabilities. These features make it an ideal choice for applications that demand high power and low noise performance. Furthermore, its PWM architecture makes it suitable for use in applications where precise control of the output voltage and current is desired.

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