PFS7636H

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Power factor correction (PFC) is an essential process in the design of power electronics applications as it enables a PFC\'s useful power to remain within required tolerances and it also minimizes losses along a power line. The PFS7636H is a high-performance 360mA Power Factor Correction IC (sometimes referred to as a Buck-Boost PFC IC). This article looks into the various application fields that the PFS7636H can be used in and describes how this IC works in order to accomplish its goal.

The PFS7636H is a mono-phase 380V PFC IC which is used to improve the power factor of loads that can consume more than 360mA. The PFS7636H is considered an open-loop PFC IC as it uses a basic voltage control technique. The voltage-control technique used by the PFS7636H is based on a peak current-mode based control scheme. This scheme allows the IC to counter the effect of line and load variation and maintain a constant peak-current limit. This IC can be used for a variety of applications such as the AC/DC adapters for appliances, non-isolated lighting, power tools and motors.

When the PFS7636H is used in applications, it can achieve a power factor of ≥0.98, thus enabling a step-down switching configuration to switch inductors as well as allowing for a low parts count and a high power density design. The IC consists of a voltage-mode switching controller, a current limit circuit, a protection circuit, and a reference voltage circuit. Its over-voltage protection circuitry increases the overall efficiency of the power supply while reducing the number of components.

It is important to note that the PFS7636H can only provide the desired power factor correction effect if the power input to the IC is regulated. Therefore, a driver circuit is used to provide a regulated voltage to the IC by using PWM control. This driver circuit works in conjunction with the COMP pin of the PFS7636H in order to control the peak input current of the IC. This peak current-controlled VM PFC IC allows for a continuous current and an effective output current ripple of about 1.5% over the entire load range.

The protection circuit of the PFS7636H is a very important component of the IC as it helps to ensure that the IC can operate safely and reliably. The protection circuit protects the IC from a variety of different faults such as an over-current, over-voltage or a short circuit. It can help to prevent potential harm to the IC if something goes wrong with the power input or system. The protection circuit can also prevent the IC from being destroyed when an excessive load is applied.

In conclusion, the PFS7636H is a high-performance, 380V Power Factor Correction IC, which is used to improve the power factor of loads that consume more than 360mA. The IC contains a peak current-mode based control scheme which helps in counteracting voltage and load variation. The PFS7636H is an open-loop PFC IC which consists of a voltage-mode switching controller, a current limit circuit, a protection circuit, and a reference voltage circuit. Thanks to these features, the PFS7636H can reach a power factor of ≥0.98, enabling a low parts count and a high power density design. It also has a protection circuit which ensures the IC operates safely and reliably and prevents potential harm to the system.

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