MP44014-BGS

Series:	*
Packaging:	Tube
Part Status:	Active
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC

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Introduction to Power Factor Correction

Power factor correction is a type of circuit in which the power factor of an AC electrical power system is corrected. Power factor is the ratio between the real power of the load compared to its apparent power. The real power is responsible for doing the actual work, but the apparent power represents the amount of power required to sustain the current within the circuit. Power factor correction is necessary because any non-unity, or poor power factor decreases the efficiency of a system as well as potentially causing other side effects such as excessive losses in the low voltage AC power distribution systems.

MP44014-BGS Power Factor Correction Application and Working Principle

The MP44014-BGS is an active current modulation power factor correction controller specifically designed for AC/DC SMPS applications. The main purpose of this product is to provide high-performance and cost-effective control solutions for multi-level boost power factor correction (PFC) systems. The non-isolated design helps reduce cost, size and the need for supervising system safety regulations. The key feature of the MP44014-BGS is the integration of a dedicated current modulation control loop, which helps regulate the supply current for better unity-power factor.Apart from providing proper current control for power factor correction, the MP44014-BGS also offers a variety of additional features. These include phase compensation, cross-conduction prevention, and line under-voltage/over-voltage protection. By incorporating these features into the system, the MP44014-BGS can reduce the number of external components, thus helping reduce system complexity and cost. In terms of its working principle, the MP44014-BGS can detect the input current by an inductive voltage transformer (LVT) located at the inrush current discharge resistor and through a closed loop current modulation control, adjust the current in order to achieve the desired power factor correction. When the current detected by LVT exceeds the reference of the controller, the controller will drive the power switch to reduce the current via PWM technique.

Conclusion

MP44014-BGS is a specialized device for power factor correction used in AC/DC SMPS applications. By incorporating an oscillator and a dedicated current modulation control loop into its design, the MP44014-BGS is capable of improving the power factor performance and reducing the cost of a system. Other features such as phase compansation, cross-conduction prevention, and line under-voltage/over-voltage protection makes it an optimal choice for system complexity, cost and safety.

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