ML4821CS

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Power Factor Correction (PFC) is an important part of the power management and control industry. It is used to ensure that the power delivered to the load is with low harmonic distortion and high power factor. ML4821CS is a type of PFC controller used in a variety of application fields. This iarticle discuss the application field and working principle of ML4821CS.

Application field of ML4821CS

ML4821CS is a high-performance True Voltage Mode Switched-mode PFC Controller integrated with extensive features. It is designed for universal input AC/DC power system, with fast transient response and superb line and load regulation. The wide variety of application fields for ML4821CS includes:

• Desktop computers
• Home electronic appliaces
• LCD/LED TV
• Set-top boxes and many more

Working principle of ML4821CS

ML4821CS works based on the principle of active power factor correction (Active PFC). It adjusts the input current waveform of the power supply in a way that it becomes similar to the input voltage waveform. This process is known as the power factor correction. Since the active PFC controller works based on the input power factor, its operating point varies depending on the load and temperature condition of the system. ML4821CS works by monitoring the input voltage, current and power factor. It then compares the reference value with the measured data and produces pulse width modulation (PWM) signals. The output of this signals are then used to control a power switch which will then adjust the input current, so that it follows the shape of the input voltage.

Conclusion

ML4821CS is the most widely used PFC controllers. Its various features, wide application field and robust working principle makes it an ideal choice for almost all types of power supplies. The article discussed the application field and working principle of ML4821CS. Hopefully, through this article readers have gained a better understanding of the ML4821CS as a type of PFC controller.

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