onsemi

ML4821CSX

ML4821CSX Description

The ML4821CSX is a Power Factor Correction (PFC) controller IC designed for high-efficiency power management applications. Manufactured by onsemi, this IC operates in Average Current Mode and is optimized for a wide range of power supply designs. The ML4821CSX is housed in a 20SOIC package and is available in Tape & Reel (TR) format, making it suitable for surface mount assembly processes. It features an operating temperature range of 0°C to 70°C, ensuring reliable performance in various environmental conditions.

Key specifications include a switching frequency of 1MHz, which allows for high-frequency operation and reduced component size. The IC is designed to operate with a supply voltage range of 12V to 18V, making it versatile for different power supply architectures. The startup current is a mere 600 µA, ensuring minimal power consumption during the initial power-up phase. The ML4821CSX is classified under HTSUS code 8542.39.0001 and has an ECCN of EAR99, indicating compliance with export regulations. Additionally, it is REACH unaffected, ensuring compliance with environmental and safety standards.

ML4821CSX Features

• Operating Temperature Range: 0°C to 70°C, ensuring robust performance across a wide temperature spectrum.
• Average Current Mode: Provides stable and efficient power factor correction, minimizing harmonic distortion and improving power quality.
• Switching Frequency: 1MHz, enabling the use of smaller inductors and capacitors, which reduces the overall size and cost of the power supply.
• Supply Voltage Range: 12V to 18V, offering flexibility in power supply design and compatibility with various input voltage sources.
• Low Startup Current: 600 µA, ensuring minimal power draw during startup, which is crucial for energy-efficient designs.
• Surface Mount Technology (SMT): The ML4821CSX is designed for surface mount applications, facilitating automated assembly processes and enhancing reliability.
• Moisture Sensitivity Level (MSL): Level 1 (Unlimited), making it suitable for storage and handling in a wide range of environments without the need for special precautions.
• Compliance and Standards: REACH unaffected and ECCN EAR99, ensuring compliance with international environmental and export regulations.

ML4821CSX Applications

The ML4821CSX is ideal for a variety of power management applications where high efficiency and compact design are critical. Its high switching frequency and average current mode operation make it particularly suitable for:

• AC-DC Power Supplies: Ideal for applications requiring high power density and efficiency, such as server power supplies, telecom equipment, and industrial power systems.
• Uninterruptible Power Supplies (UPS): Ensures stable power delivery with minimal harmonic distortion, enhancing the reliability and performance of backup power systems.
• Power Factor Correction (PFC) Modules: The ML4821CSX is designed to correct the power factor in power supplies, reducing energy losses and improving overall system efficiency.
• Consumer Electronics: Suitable for high-efficiency power supplies in consumer electronics, such as TVs, monitors, and gaming consoles, where compact size and high performance are essential.

Conclusion of ML4821CSX

The ML4821CSX from onsemi is a versatile and efficient PFC controller IC designed for demanding power management applications. Its wide operating temperature range, high switching frequency, and low startup current make it an excellent choice for compact and high-efficiency power supply designs. The ML4821CSX's compliance with international standards and its surface mount package further enhance its suitability for modern manufacturing processes. While the product is now obsolete, its unique features and performance benefits continue to make it a valuable component for legacy systems and specific applications where its capabilities are unmatched.