L4981AD013TR

The L4981AD013TR is a highly integrated power factor correction (PFC) controller IC commonly used in switch-mode power supplies. It is designed to enhance the efficiency and power quality by ensuring that the input current waveform follows the input voltage waveform, thus achieving a unity power factor. Key features of the L4981AD013TR include its ability to operate in continuous conduction mode (CCM) and provide average current-mode control, which helps in minimizing harmonic distortion and improving the power factor.
This IC is typically used in applications requiring compliance with international power quality standards, such as IEC 61000-3-2, which regulates harmonic current emissions. It includes various built-in protections like over-voltage, over-current, and thermal shutdown to ensure reliable operation. The device is suitable for a wide range of power levels and is often employed in industrial power supplies, consumer electronics, and lighting systems where efficient energy use is critical.
Manufactured by STMicroelectronics, the L4981AD013TR comes in a compact package and is well-regarded for its robustness and efficiency in power factor correction applications.

The L4981AD013TR is a high-performance power factor correction (PFC) controller designed for use in various power supply applications. Key features of this device include:
1. Active PFC Controller: It utilizes continuous conduction mode (CCM) to improve the power factor, making it ideal for applications needing high efficiency and low harmonic distortion.
2. Current-Mode Control: This feature allows for precise regulation and fast transient response by directly controlling the input current.
3. Wide Input Voltage Range: The controller is designed to operate efficiently across a broad range of input voltages.
4. Programmable Features: Includes programmable output voltage, switching frequency, and soft start, providing flexibility in design.
5. Overvoltage Protection (OVP): Protects the system by shutting down the operation in overvoltage conditions.
6. Undervoltage Lockout (UVLO): Ensures the device operates only when the input voltage is above a certain threshold, enhancing reliability.
7. Low Start-Up Current: Reduces power consumption during start-up for improved efficiency.
8. Compact Package: Available in a small outline package for easy integration into space-constrained applications.
These features make the L4981AD013TR suitable for use in power supplies for computers, industrial systems, and other electronic equipment requiring efficient power management.

The L4981AD013TR is a power factor correction (PFC) controller typically available in a surface-mount package format, specifically a SOIC-16 (Small Outline Integrated Circuit with 16 leads) package. This package type is commonly used for its compact size and ease of automated assembly in electronic circuits.

The L4981AD013TR is a power factor correction (PFC) controller IC, which is used to improve the power factor of electronic devices by controlling the flow of power. It typically comes in an SO-20 package, meaning it has 20 pins.
The primary functions of the L4981AD013TR include:
1. Power Factor Correction: It adjusts the phase angle between voltage and current waveforms to approach unity, minimizing losses and improving energy efficiency.
2. Boost Converter Control: It manages the operation of a boost converter circuit, which steps up the input voltage to a higher output voltage.
3. Current Sense: It monitors input current to maintain it in phase with the input voltage.
4. Feedback Control: It receives feedback from the output to regulate voltage.
5. Fault Protection: It provides protection features like over-voltage, over-current, and thermal shutdown to enhance reliability.
Each pin has specific roles, such as power supply, ground, feedback control, and gate drive output for the MOSFET in the boost converter. For detailed pin functions, refer to the manufacturer's datasheet.

The L4981AD013TR is manufactured by STMicroelectronics. STMicroelectronics is a global semiconductor company that designs, develops, manufactures, and markets a broad range of semiconductor products. The company is headquartered in Switzerland and operates worldwide, serving various sectors including automotive, industrial, personal electronics, and communications equipment. STMicroelectronics is known for providing innovative solutions and technologies in fields such as microcontrollers, power management, and sensors.

The L4981AD013TR is a voltage-mode PWM controller typically used in applications such as switch-mode power supplies (SMPS), AC-DC converters, and DC-DC converters. It is well-suited for use in computer power supplies, battery chargers, and consumer electronics where efficient power conversion is required. Its design allows for improved performance in terms of regulation, efficiency, and power density.

The L4981AD013TR is a power factor correction (PFC) controller from STMicroelectronics. Equivalent products are those with similar functionality and specifications. Some possible equivalents include the Texas Instruments UC3854 and the ON Semiconductor NCP1653. When choosing a replacement, ensure compatibility with your specific application, including electrical characteristics and package type. Always refer to the datasheets for detailed comparisons.