STK760-211A-E

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Part Status:	Obsolete

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Power Factor Correction (PFC)

Power factor correction is a technique which is used to improve the power usage efficiency of electrical systems. It does this by controlling the flow of current into an electrical system, and by maintaining optimal phase-shift between the voltage and current within the system. This technique is especially relevant to the operation of large substations or distributed energy systems (DES). The STK760-211A-E is a particular type of power factor controller which is specifically designed to be used in PFC applications.

Introduction to the STK760-211A-E

The STK760-211A-E is a PFC circuit designed by STK, a leading manufacturer of power management integrated circuits. It is a fully integrated device which combines active and passive elements and is designed to correct the power factor of electrical systems. The STK760-211A-E is constructed from advanced power MOSFETs and bipolar transistors, which have been optimized for low parts count, low power loss, wide operating temperature range and low electromagnetic interference. This makes it especially suitable for applications in the industrial, commercial, and medical sectors.

Benefits of the STK760-211A-E

The STK760-211A-E provides several advantages over other types of power factor controllers. Firstly, it takes up a minimal amount of board space, as it requires only two components – the power stage and driver ICs. Secondly, it is designed to be highly reliable, with an operating temperature range of up to 150°C and an off-state dielectric strength of up to 5000Vrms. Furthermore, the STK760-211A-E is designed to offer improved performance compared to other PFC circuits, with a maximum power factor of 0.995 and an efficiency rating of up to 97%.

Operation of the STK760-211A-E

The STK760-211A-E operates in two main parts: a power stage and a control stage. The power stage is responsible for controlling the amount of current being drawn by the system and ensuring a high power factor by performing a process known as power factor correction. This process is done by varying the conduction angle of the power MOSFETs, which allows it to regulate sinusoidal current and voltage accordingly. The control stage is responsible for monitoring the voltages and currents in the system, and ensuring that the power factor always stays within the prescribed limits. It does this by driving the power MOSFETs in an appropriate manner. The control stage is also designed to provide protection against overcurrent and overvoltage, helping to minimize the risk of system damage.

Applications of the STK760-211A-E

The STK760-211A-E is mostly used for power factor correction (PFC) in large distributed energy systems (DES), such as those used in the industrial, commercial, and medical sectors. This circuit is also suitable for other applications, such as solar inverters and electric vehicle onboard chargers. In distributed energy system applications, the STK760-211A-E is typically deployed in a central location, where it can control the current and voltage in the system to ensure a high power factor. This helps to minimize losses and improve the efficiency of the system.

Conclusion

The STK760-211A-E is designed to provide an efficient and reliable solution to power factor correction and load current regulation. It offers superior performance compared to other PFC circuits, with a wide operating temperature range and a maximum power factor of 0.995. Furthermore, it is suitable for deployment in distributed energy systems, as well as electric vehicle FBE and solar inverters.

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