L4981A

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Power Factor Correction (PFC) is a technique used in modern electrical power supplies to improve the power factor of the device. PFC is a critical and important area of power electronics and its application can be seen in a wide variety of electronic devices and systems. In particular, the application of PFC in power management is becoming increasingly popular and important. Through the use of proper PFC devices such as the L4981A, it is possible to provide a higher power factor, greater efficiency and better system performance.

The L4981A is a current-mode Pulse Width Modulation (PWM) Power Factor Controller (PFC) IC from STMicroelectronics. The IC is designed for use in off-line, high power factor devices such as televisions and other electronic devices, where energy savings are important. The L4981A has several features that make it an ideal choice for this application. It offers high performance, flexibility and low noise operation, which makes it reusable in a variety of power conversion topologies.

The L4981A integrates a high speed PFC boost converter. It features high switching frequency capability to maximize efficiency, while simultaneously reducing noise and EMI ( electrolytic capacitor, choke, etc…). The IC also includes features such as a unique autoregulation control loop, programmable frequency over temperature control and a wide input voltage range operation. This allows the IC to be used in a variety of applications and provides the end user with higher power conversion efficiency and more consistent performance over temperature and input voltage.

The L4981A is designed to operate in voltage regulation mode, which means it can sense the load voltage and adjust its output voltage as needed. It also features power factor correction, which ensures that the device meets standards for power factor rating. The L4981A is designed to operate in the discontinuous conduction mode (DCM) in order to maximize efficiency, reduce heat and provide a very low harmonic distortion.

The L4981A has a wide range of application areas such as switched mode power supplies, DC-DC converters, motor speed control, lighting systems, white goods and home appliances. It is an ideal choice for designers of high power factor applications where low consumption, high efficiency, wide input voltage range and high reliability are important.

In conclusion, the L4981A provides a flexible platform for applications requiring high power factor performance. This device is able to meet power factor requirements while maximizing efficiency, resulting in significant energy savings. The L4981A also features several features such as a unique autoregulation control loop, programmable frequency over temperature control, wide input voltage operating range and a low noise operation. This makes the device an ideal choice for designers of high power factor applications.

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