UCC2889NG4

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UCC2889NG4 is a step-down and switch mode regulator IC commonly used in PMIC (Power Management Integrated Circuit) applications. The device combines an efficient, low cost and low profile power conversion module with built–in protection and diagnostic features. This IC is ideally suited for applications such as AC-DC, offline switchers, points-of-load converters, small form factor power supplies and switch mode regulators.

The primary function of the UCC2889NG4 is to perform power conversion from the AC line voltage to a lower output voltage. This is accomplished by using the MOSFET based synchronous rectifier, coupled with the hysteretic controller, with cycle-by-cycle current limit, to switch between the input and output stages. The current limit feature allows for accurate and consistent maximum output current, which is useful for driving power-hungry loads, as well as protecting the MOSFET from overload. When the switching cycle ends and the output voltage is reached, the hysteretic control loop keeps the output voltage at the desired level.

In addition to the current limit feature, the UCC2889NG4 has a built-in overvoltage and undervoltage protection, as well as short circuit protections. These features ensures safe operation of the device and allows it to operate over a wide input voltage range. The IC also offers a variety of diagnostic outputs, such as the active low fault flag, which indicates when the output voltage is too low or too high. The open-drain fault status flag is also available to indicate a short circuit at the output.

The UCC2889NG4 is an efficient and cost-effective solution for a variety of PMIC applications, especially for AC-DC, offline switchers, points-of-load converters, small form factor power supplies and switch mode regulators. This IC provides the reliability and flexibility needed to power a wide range of applications, from web servers to home appliances. With its built-in protection and diagnostic features, the UCC2889NG4 ensures safe and reliable operation throughout its lifetime.

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