ML4800IP

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Introduction to the ML4800IP Power Factor Correction (PFC)

ML4800IP is an integrated Power Factor Correction (PFC) application field and working principle developed by ROHM Semiconductor. It is designed to reduce the current distortion caused by the non-linear loads, such as AC/DC adapters, Uninterruptible Power Supplies (UPSs), lighting solutions, inverters, motor drivers, and solar/wind energy systems. The ML4800IP reduces harmonic current jitter by providing a high-efficiency, low-cost solution for correcting the power factor.

Working Principle of the ML4800IP PFC

The ML4800IP adopts a Active Current Modulation (ACM) control scheme. This scheme uses a control feedback loop utilizing the primary-side current passing through a sense resistor. The output current reference is determined by the detected current passing through the sense resistor. This enables more rapid responses of the current loop, resulting in higher current accuracy and improved line/load regulations.

The ACM is able to regulates both line and load variations, providing excellent input power factor. The current loop is also able to regulate the operating frequency and phase shift, allowing optimized performance at the system level.

Features of the ML4800IP PFC

The ML4800IP offers a wide range of features that make it an ideal choice for Power Factor Correction (PFC) applications. It includes:

• Integrated over voltage protection (OVP), Under voltage protection (UVP) and Surge protection
• High efficiency: up to 98% efficiency under 230VAC
• Up to 30W output power
• Line input current: 0.6A to 8A
• Current-mode
• High-speed flexibility: optimized response over a wide range of input frequencies
• Advanced dimming techniques: 1.5MS/K dimming
• Supply voltage range: 10 to 400VAC

Applications of the ML4800IP PFC

The ML4800IP is a multi-functional device, with various applications that require Power Factor Correction (PFC). These applications include:

• AC/DC Adapter including AC/AC adapters
• Uninterruptible Power Supplies (UPSs)
• Lighting solutions, including LED applications
• Inverters
• Motor Drivers
• Solar/Wind energy systems

Benefits of the ML4800IP PFC

The ML4800IP offers a wide range of benefits for Power Factor Correction (PFC) applications. These benefits include:

• High efficiency: up to 98% efficiency under 230VAC
• Low cost solution
• Reduced harmonic current jitter
• Accurate current regulation for higher performance
• Optimized performance at the system-level due to line and load regulation
• Supports dimming techniques
• Wide range of input voltage range

Conclusion

The ML4800IP Power Factor Correction (PFC) application field and working principle is a high-efficiency, low-cost solution for correcting the power factor. It provides excellent input power factor regulation, supports current-mode control, and enables the use of dimming techniques. Moreover, it is ideal for applications such as AC/DC adapters, Uninterruptible Power Supplies (UPSs), lighting solutions, inverters, motor drivers, and solar/wind energy systems. With its wide array of features and benefits, the ML4800IP is an excellent choice for Power Factor Correction (PFC) applications.

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