L6562AD

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A power factor correction circuit, also known as a PFC circuit, is a type of electronic circuit used to improve the power factor of an AC power system. The purpose of a PFC circuit is to ensure that the maximum power is delivered from the power grid to the load. The L6562A is a high-performance PFC controller designed for use in high-power applications. It is an integrated circuit that provides a complete solution for Active Power Factor Correction (PFC) applications in AC-DC converters.

The L6562A is a high-performance PFC controller, with an operating frequency up to 100kHz, a Ripple Amplitude of 2.5% and a host of other features. It includes an oscillator, a PWM controller, and a low-side MOSFET driver. It also has an adjustable Valley waveform and a Burst Mode function. The PFC voltage can be configured in either buck or boost topology, and the duty cycle is adjustable from 0 to 99.9%.

The application field of L6562A controller is wide. It is suitable for AC-DC conversion of electronic ballasts, LED drivers, engineering and auxiliary equipment, game machines, motor drives, lamps & lighting, emergency lighting and other power with high volume applications.

The working principle of L6562A is as follows. In an AC-DC converter, the input current is rectified and filtered by a rectifying and filtering circuit. This circuit is then sent to the L6562A. The L6562A controller compares the zero-crossing pulses of the AC voltage and the output of the rectifying and filtering circuit. The controller then adjusts the duty cycle of the power switch in order to achieve the desired power factor.

The L6562A also has a number of safety features, such as overload protection, short-circuit protection and overvoltage protection. It also includes a variety of housekeeping functions, such as voltage monitoring, soft start and current limiter. These features combined with its low power consumption and cost make it an ideal choice for PFC applications.

In summary, the L6562A is a high-performance integrated PFC circuit with a variety of features, making it suitable for a wide range of AC-DC conversion applications. Its adjustable duty cycle, safety features, and low power consumption make it an excellent choice for PFC applications.

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