TB6818FG,EL Integrated Circuits (ICs)

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Power Factor Correction (PFC) is becoming increasingly important to ensure that the components and products used in modern electrical and electronics applications are running efficiently and safely. The TB6818FG EL provides power factor correction in the form of a highly innovative and energy efficient power factor pre-regulator equipped with flyback circuit function.

The TB6818FG EL is suitable for use in of a wide range of power conversion applications such as AC/DC Adapter and Switching Power Supplies with power levels up to 120W in a single-phase regime. The chip integrates the necessary components for the power factor correction pre-regulator, such as an enhanced voltage-mode control buck converter, which provides the necessary isolation to easily adapt input voltage variation from 85VAC to 265VAC.

The TB6818FG EL is primarily designed to increase the total efficiency of the power supply and to keep the input power factor above 0.98. This is achieved by continuously adjusting the switching frequency and pulse width of the converter based on the load and the phase angle between the mains current and voltage. This not only reduces the input current harmonics, but it also allows a soft-start for the converter when connected to the mains.

The TB6818FG EL also provides protection against inrush current and voltage regulation on the output side of the PFC. The set inrush current can be adjusted to limits below 6A or 12A peak current by adjusting an external resistor, making it suitable for a variety of output power requirements. Its integrated over-voltage protection (OVP) and over-temperature protection for the primary side keep the system components safe and efficiently operating for extended time periods.

The TB6818FG EL includes a comprehensive self-diagnosis system, which allows the device to detect various abnormal operation conditions including primary-side AC input voltage, switching frequency, and output load. Upon detection of any abnormal conditions, the device takes corrective measures to ensure that the device is not harmed and that efficiency levels remain high.

The TB6818F EL is a highly innovative and energy efficient power factor pre-regulator, providing a simple and reliable solution for improving the power factor of switching power supplies and AC/DC adapters. With its highly efficient operations, advanced protection functions, and ease of integration, the TB6818F EL ensures that power conversion applications are running efficiently and safely.

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