onsemi

NCP1937B2DR2G

NCP1937B2DR2G Description

The NCP1937B2DR2G is a Power Factor Correction (PFC) controller designed for critical conduction mode (CRM) applications. Manufactured by onsemi, this IC is part of the NCP1937 family and is optimized for high efficiency and performance in power supply designs. It features a supply voltage range of 9V to 30V and a startup current of 20 mA, making it suitable for a variety of power conversion applications. The NCP1937B2DR2G is packaged in a 20-lead SOIC (Small Outline Integrated Circuit) and is available in tape and reel format, facilitating surface mount assembly processes. Despite its obsolete status, the NCP1937B2DR2G remains a reliable choice for engineers seeking a robust PFC solution. It is REACH unaffected and RoHS3 compliant, ensuring compliance with environmental regulations.

NCP1937B2DR2G Features

• Critical Conduction Mode (CRM): The NCP1937B2DR2G operates in critical conduction mode, which enhances efficiency by ensuring that the inductor current reaches zero at the end of each switching cycle. This mode of operation reduces switching losses and improves overall system efficiency.
• Wide Supply Voltage Range: With a supply voltage range of 9V to 30V, the NCP1937B2DR2G is versatile and can be used in a variety of power supply applications, including those with fluctuating input voltages.
• Low Startup Current: The low startup current of 20 mA ensures that the IC can start up reliably even in low-power environments, making it suitable for applications where power consumption during startup is a concern.
• Surface Mount Technology: The surface mount package type facilitates easy integration into modern PCB designs, allowing for compact and efficient power supply solutions.
• Environmental Compliance: The NCP1937B2DR2G is REACH unaffected and RoHS3 compliant, ensuring that it meets the stringent environmental standards required by regulatory bodies.
• Moisture Sensitivity Level (MSL): With an MSL of 1 (Unlimited), the NCP1937B2DR2G is suitable for use in environments with varying humidity levels, providing added reliability and durability.

NCP1937B2DR2G Applications

The NCP1937B2DR2G is ideal for applications requiring high efficiency and reliable power factor correction. Some specific use cases include:

• Switching Power Supplies: The CRM operation mode and wide supply voltage range make the NCP1937B2DR2G suitable for high-efficiency switching power supplies used in consumer electronics, industrial equipment, and telecommunications infrastructure.
• AC-DC Converters: The IC's ability to operate in a wide voltage range and its low startup current make it an excellent choice for AC-DC converters, ensuring stable and efficient power conversion.
• Energy-Efficient Appliances: The NCP1937B2DR2G's efficiency and compliance with environmental regulations make it a preferred choice for energy-efficient appliances, contributing to reduced power consumption and lower operational costs.

Conclusion of NCP1937B2DR2G

The NCP1937B2DR2G is a robust and versatile PFC controller that offers significant performance benefits in critical conduction mode applications. Its wide supply voltage range, low startup current, and surface mount packaging make it suitable for a variety of power supply designs. Despite being marked as obsolete, the NCP1937B2DR2G remains a reliable and efficient solution for engineers seeking a high-performance PFC controller. Its compliance with environmental regulations ensures that it meets the standards required by modern electronics manufacturing. For applications requiring high efficiency and reliable power factor correction, the NCP1937B2DR2G is an excellent choice.