FAN4810M

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FAN4810M application field and working principle

Power factor correction (PFC) is the most widely used technologies to enhance the efficiency and reduce the pollution of the power supply. The trending in the power electronics market is to integrate more functions into one IC, which can save the space, cost and make the design of power system more simple and easy. FAN4810M, as a single-stage continued conduction mode PFC controller, can fully meet this requirement.

The application fields of FAN4810M are mainly covers the system above 50W or higher power with the universal AC input voltage. For example, the power adapters, chargers and switching power supplies. FAN4810M has a small SOP-8 package, small on-chip MOSFET and its gate driver and no need external components.This feature makes it suitable for the applications with a very small space. And its small package also saves the cost.

The working principle of FAN4810M is based on the continuous conduction mode (CCM). The CCM is a kind of operation mode that one of the inductors current is always closed, keeps the operation under a certain inductors current when the power factor reaches 1.The control of FAN4810M is based on the voltage feedback and current feedback. The voltage feedback function helps to check the output voltages, and the controller will adjust the output voltage in order to maintain the accurate output voltage. In the meanwhile, FAN4810M can work with an external resistor to form a current feedback loop. The current feedback loop can check the output current, and the.controller will adjust the output current in order to meet the prevention of load’s harmonic distortion.

The greatest characteristics for FAN4810M are high efficiency, fast transient response, and no-external component operation. Comparing with other single ICs, FAN4810M has less external component number, which can reduce the power losses and save the cost. In addition, the adjustable switching frequency, current sensing and open loop control make FAN4810M much more convenient and accurate.

To sum up, FAN4810M as a single-stage continuous conduction mode PFC controller can be widely used in power applications with low component number, such as power adapters, chargers and switching power supplies. It has accurate current feedback, fast transient response and high efficiency, which can fully meet the requirements of the power electronics market and make the power system design easier and more efficient.

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