STMicroelectronics

L4981AD

L4981AD Description

The L4981AD is a high-performance, average current mode, power factor correction (PFC) controller designed for use in a wide range of applications. Manufactured by STMicroelectronics, this device is known for its exceptional performance and reliability. With a switching frequency of 100kHz and a supply voltage range of 14.5V to 19.5V, the L4981AD is well-suited for applications requiring high efficiency and power density.

L4981AD Features

• Average Current Mode Control: The L4981AD operates in average current mode, which provides excellent line regulation and fast transient response, making it ideal for applications requiring precise control and stability.
• Wide Voltage Range: With a supply voltage range of 14.5V to 19.5V, the L4981AD can handle a wide range of input voltages, making it versatile for various applications.
• High Switching Frequency: The 100kHz switching frequency allows for smaller external components and higher power density, which is beneficial for compact designs.
• Low Startup Current: The L4981AD has a low startup current of 100 µA, which reduces power consumption during startup and extends the life of the power supply.
• RoHS Compliance: The L4981AD is compliant with the RoHS3 directive, ensuring that it meets environmental standards and can be used in products destined for the European market.
• REACH Unaffected Status: This IC is not affected by the REACH regulation, which means it does not contain any substances of very high concern (SVHC) above the threshold limits.
• Moisture Sensitivity Level (MSL) 3: The L4981AD has an MSL of 3, which means it can withstand up to 168 hours of exposure to moisture before baking is required.

L4981AD Applications

The L4981AD is ideal for a variety of applications where high efficiency and power factor correction are crucial. Some specific use cases include:

• AC-DC Power Supplies: The L4981AD is perfect for AC-DC power supplies, where high efficiency and power factor correction are essential for meeting energy standards.
• Telecommunications Equipment: In telecommunications, reliable and efficient power supplies are critical. The L4981AD can help meet these requirements while also reducing energy consumption.
• Industrial Equipment: Industrial applications often require high power density and efficiency, making the L4981AD an excellent choice for these demanding environments.
• Computer Peripherals: For computer peripherals such as monitors and printers, the L4981AD can provide the necessary power factor correction and efficiency to meet energy standards.

Conclusion of L4981AD

The L4981AD from STMicroelectronics is a powerful and versatile PFC controller that offers excellent performance and reliability. Its unique features, such as average current mode control and a wide voltage range, make it an ideal choice for a variety of applications. With its RoHS and REACH compliance, the L4981AD is not only a high-performance solution but also an environmentally responsible one. Whether you're designing AC-DC power supplies, telecommunications equipment, or industrial systems, the L4981AD is a reliable and efficient choice.