the active power factor correction (PFC) of FAN4810 Circuit design

The FAN4810 operates as a continuous conduction mode (CCM) power factor correction (PFC) controller. It features an internal safety detection mechanism that prevents circuit malfunction due to component damage. The device has a power-handling capability of up to 1A, eliminating the need for an external power MOSFET driver. Its low power consumption enhances overall circuit efficiency and minimizes component losses. The FAN4810 includes a current limit function, overload protection, and an output voltage protection circuit. In response to sudden load changes, the internal overvoltage comparator can deactivate the PFC circuit. This controller is suitable for synchronous PWM applications, reducing the likelihood of erratic clock signal outputs. The design methodology for a 500W PFC circuit utilizing the FAN4810 is presented, with an output voltage of 400VDC and a current of 1.25A, compatible with AC input voltages ranging from 90 to 264VAC. The operating efficiency is rated at 0.93, and the FAN4810 meets the technical standards outlined in IEC 3000-3-2.

The FAN4810 is a highly efficient integrated circuit designed for power factor correction in various applications. It operates in continuous conduction mode (CCM), which allows for a more stable output voltage and improved efficiency in power delivery. The internal safety detection mechanism is crucial for protecting the circuit from conditions that could lead to component failure, ensuring that the system remains operational under a variety of circumstances.

With a maximum power-handling capability of 1A, the FAN4810 eliminates the necessity for an external power MOSFET driver, simplifying the overall design and reducing component count. This feature is particularly beneficial in compact circuit designs where space is at a premium. The low power consumption of the FAN4810 contributes to its high operating efficiency, which is measured at 0.93, indicating that the majority of the input power is effectively utilized.

The current limiting feature is essential for preventing excessive current draw that could lead to overheating or damage. Coupled with overload protection and output voltage safeguards, the FAN4810 can effectively manage sudden changes in load conditions. The internal overvoltage comparator is a critical component that can disable the PFC circuit in response to abnormal voltage levels, thereby protecting the entire system.

The FAN4810 is well-suited for synchronous PWM applications, where it can help maintain a stable output clock signal. This is particularly important in high-frequency switching applications where timing is critical. The design methodology for implementing a 500W power factor correction circuit with the FAN4810 is outlined, highlighting its capability to deliver a regulated output voltage of 400VDC at a current of 1.25A. This circuit is designed to accommodate a wide range of AC input voltages from 90 to 264VAC, making it versatile for various power environments.

Overall, the FAN4810 stands out as a reliable and efficient solution for power factor correction, meeting the technical requirements specified in IEC 3000-3-2, and making it suitable for modern electronic applications that demand high efficiency and reliability.FAN4810 work, to the average current, electric current of front continuously CCM The work pattern of voltage output rises, the internal treble safe detection technique can make the circuit avoid making the circuit not in normal operating conditions because components and parts of a certain circuit are damaged; The grid outputs power-handling capab ility and is up to 1A, therefore needn`t connect the power MOSFET driving circuit!; The low power consumption characteristic has improved the operating efficiency of the circuit, and reduced the loss of the components and parts. FAN4810 also has crest current that limits the function, utilize overlow protection and protective circuit of output voltage of input voltage of internal exchange, can shut off the work of PFC circuit through the internal over voltage comparator in case of sudden change of output load, it can be used in the synchronous subordinate PWM circuit, in order to reduce the circuit to work rash to output the clock signal.

The pin picture of FAN4810 is shown as in Fig. 1, their functional block diagrams of job are shown as in Fig. 2, FAN4810 pin function shown in Table 1. The following introduction adopts circuit design relevant methods of 500W power factor correction of FAN4810, the working principle diagram of the circuit is shown as in Fig. 4, PFC output voltage of this 500W output circuit is 400VDC, the output current is 1. 25A, the accommodation of voltage of city power of ac input is 90- 264VAC. FAN4810 work, to the average current, electric current of front continuously CCM The work pattern of voltage output rises, the internal treble safe detection technique can make the circuit avoid making the circuit not in normal operating conditions because components and parts of a certain circuit are damaged; The grid outputs power-handling capability and is up to 1A, therefore needn`t connect the power MOSFET driving circuit!; The low power consumption characteristic has improved the operating efficiency of the circuit, and reduced the loss of the components and parts.

FAN4810 also has crest current that limits the function, utilize overlow protection and protective circuit of output voltage of input voltage of internal exchange, can relatively shut off the work of PFC circuit through internal over voltage in case of sudden change of output load, it can be used in the synchronous subordinate PWM circuit, in order to reduce the circuit to work rash to output the clock signal. The pin picture of FAN4810 is shown as in Fig. 1, their functional block diagrams of job are shown as in Fig. 2, FAN4810 pin function shown in Table 1. The following introduction adopts circuit design relevant methods of 500W power factor correction of FAN4810, the working principle diagram of the circuit is shown as in Fig.

4, PFC output voltage of this 500W output circuit is 400VDC, the output current is 1. 25A, the accommodation of voltage of city power of ac input is 90- 264VAC. RD-SPACING: 0px; FONT: 14px/26px Song Ti, arial; TEXT-TRANSFORM: none; COLOR: rgb0, 0, 0 ; TEXT-INDENT: 0px; PADDING-TOP: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb255, 255, 255 ; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px  >Operating efficiency =0. 93 FAN4810 can be used for turning on the work pattern CCM on the electric current continuously in any work PFC application under, can meet the relevant technical requirements for IEC 3000-3-2

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