FAN7529N

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Power Factor Correction (PFC) is the process of controlling power supply operations for improved efficiency and overall power transfer. It is used to reduce power loss in electrical systems, improve power quality, and optimize system performance.The FAN7529N is a PMIC specifically designed for high accuracy and efficiency Power Factor Correction (PFC) applications. This integrated circuit can be used in power supplies and other power circuits that require PFC control. It features a high-accuracy input current sensing circuit, a high-performance digital signal processor, and an integrated current regulation loop for maximum efficiency.The FAN7529N is designed to work with a wide range of AC voltage inputs, from a wide range (~100VAC - 500VAC) to a narrow range (120VAC - 240VAC). It is optimized with the integrated power switch lowering conduction loss and improving power efficiency. The FAN7529N includes protection features such as: thermal protection, short-circuit protection, under-voltage lock out, and over-voltage protection.The working principle of the FAN7529N is based on the closed-loop current regulation method. The current regulation loop creates a set of comparative signals that extend back to the input side of the boost converter. The Full-bridge power switch takes the input voltage and boosts it up to the desired output voltage.The current sense circuit compares the current through the output inductor to a reference signal and then compensates for errors. During operation, the signal at the output is compared to the reference signal and the error is then sent to the signal processor where it is then passed on to the main PFC controller.The main PFC controller manipulates the current regulation loop of the system so that the current through the output inductor is regulated to the reference. This ensures that the current through the inductor does not exceed the set reference, preventing possible damage to the system.The main control loop in the FAN7529N automatically adjusts the optimum operating parameters according to changes in line voltage, load resistance, and load current. This allows the FAN7529N to provide higher efficiencies than conventional PFC implementations.In summary, the FAN7529N is a highly efficient and accurate PMIC specifically designed for Power Factor Correction applications. It features a high input voltage range, a high-accuracy current sensing circuit, and an integrated current regulation loop that makes it an ideal choice for applications that require highest levels of power efficiency.

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