TEA1792AT/1,118

Power Factor Correction (PFC)

Power Factor Correction (PFC) is an electronic means of improving the efficiency of power grids. It is accomplished by introducing a control signal in order to reduce harmonic distortion and improve the power factor of the grid. The TEA1792AT/1,118 application field and working principle is a great example of a high-efficiency power conversion system.

TEA1792AT/1,118 Application Field
The TEA1792AT/1,118 is a step-up switching regulator designed to drive LEDs connected in series. It is optimized for a Switch Mode Power Supply (SMPS) with a power factor of more than 0.94, a no-load input power of less than 6W, and a high conversion efficiency of more than 97%. It can be used in AC-DC applications such as energy saving lamps and high-power lighting systems.

Working Principle of the TEA1792AT/1,118
The working principle of the TEA1792AT/1,118 PFC is based on a two-stage approach. The two-stage approach consists of a buck-boost converter stage that operates on peak current control and a boost converter stage that operates on valley current control. The two stages work together to ensure a high power factor and high efficiency.The peak current control technique used in the buck-boost converter stage of the TEA1792AT/1,118 helps to reduce harmonic distortion and improve the power factor, thus improving the efficiency of the circuit. This technique is used when the input voltage is in the range of the nominal input voltage, and the output of the buck-boost converter is adjusted accordingly to maintain the desired power factor.The valley current control technique used in the boost converter stage helps to improve the peak efficiency of the system. This technique is used when the input voltage is above the nominal level, allowing the system to operate in a more efficient region.The two-stage technique used in the TEA1792AT/1,118 PFC provides excellent efficiency and power factor performance, while minimizing harmonic distortion.

Conclusion
The TEA1792AT/1,118 is a great example of a high-efficiency power conversion system. It utilizes a two-stage approach to ensure a high power factor and high efficiency. The peak current control technique used in the buck-boost converter stage help to reduce harmonic distortion and improve the power factor, while the valley current control technique used in the boost converter stage helps to improve the peak efficiency of the system.