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L4985A

L4985A Description

The L4985A is a Continuous Conduction Mode (CCM) Power Factor Correction (PFC) controller designed for high voltage applications. Manufactured by STMicroelectronics, this device is engineered to provide efficient power management solutions in a wide range of electronic systems. The L4985A operates in a surface mount package, making it suitable for compact and high-density designs. It is rated for a supply voltage range of 10V to 24.5V and features a switching frequency of 65kHz, ensuring stable and efficient power conversion.

The L4985A is classified under ECCN EAR99 and is REACH unaffected, adhering to stringent environmental and regulatory standards. It is also RoHS3 compliant, reflecting STMicroelectronics' commitment to environmental sustainability. The device is available in a tube package and has a moisture sensitivity level (MSL) of 3, allowing for a 168-hour exposure period before assembly.

L4985A Features

The L4985A offers several key features that set it apart from similar PFC controllers:

• Continuous Conduction Mode (CCM): This mode ensures high efficiency and reduced electromagnetic interference (EMI), making it ideal for applications requiring stringent EMI compliance.
• Wide Supply Voltage Range (10V to 24.5V): This broad voltage range enhances the flexibility of the L4985A, allowing it to be used in various power supply designs.
• 65kHz Switching Frequency: The high switching frequency enables the use of smaller inductors and capacitors, contributing to a more compact and cost-effective design.
• Low Startup Current (400 µA): This feature minimizes power consumption during startup, enhancing overall system efficiency.
• Surface Mount Technology (SMT): The SMT package type facilitates automated assembly processes, improving production efficiency and reliability.
• Moisture Sensitivity Level 3: This rating ensures the device can withstand extended exposure to moisture, making it suitable for a variety of manufacturing environments.

L4985A Applications

The L4985A is well-suited for a variety of applications, including:

• Power Supplies: Ideal for AC-DC power supplies in consumer electronics, industrial equipment, and telecommunications infrastructure.
• Uninterruptible Power Supplies (UPS): Enhances the efficiency and reliability of UPS systems, ensuring stable power delivery during outages.
• Solar Inverters: Contributes to the efficiency of solar power conversion systems, optimizing energy transfer and reducing losses.
• Motor Drives: Provides efficient power management for motor control applications, ensuring smooth and reliable.

operation### Conclusion of L4985A

The L4985A from STMicroelectronics is a robust and versatile CCM PFC controller designed to meet the demands of modern power management applications. Its wide supply voltage range, high switching frequency, and low startup current make it an excellent choice for and compact efficient power supply designs. The device's compliance with environmental regulations and its surface mount package further enhance its appeal for high-density and automated manufacturing processes. Whether used in power supplies, UPS systems, solar inverters, or motor drives, the L4985A delivers reliable performance and significant efficiency benefits.