R2A20104SP#W0

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Traditional switching power supplies generate high amount of harmonic distortion. To reduce the impact of these harmonics, Power Factor Correction (PFC) is used. Reduction of input current draw is one of the main benefits of using PFC. PFC offers a number of modifications in the operation of switching power supplies. This article reviews the R2A20104SP#W0, which is a PFC controller, and will discuss its application field, as well as the working principle behind it.

Application Field of the R2A20104SP#W0 PFC Controller

The R2A20104SP#W0 is a PFC controller designed for high efficiency applications and for single phase power supplies. This device can be used in a variety of applications, such as:

• Non-isolated DC/DC converters (step up and step down)
• AC/DC switching power supplies
• Chargers
• Adapters

The R2A20104SP#W0 can achieve high performance with minimal understanding of application design: it is a high voltage, current mode (peak current mode) PFC controller with excellent line and load regulations. This device is capable of providing outstanding performance using low complexity circuitry.

R2A20104SP#W0 Working Principle

The primary function of the R2A20104SP#W0 is to improve the power factor of a power supply by regulating its current. This is achieved using two main stages, namely the primary and the secondary stage. The primary stage is used to correct the input voltage waveform, while the secondary stage is used to correct the output current waveform.

The primary stage of the PFC can be thought of as an AC-DC converter, which converts an input AC waveform into an in-phase DC waveform. The size of the current waveform is determined by the peak current threshold, usually set by a current sense resistor connected to the PFC controller. A comparator in the controller will compare the current flowing through the current sense resistor to a reference voltage, and will then adjust the voltage at the power switch accordingly.

The secondary stage of the PFC introduces an additional comparator. This comparator will compare the output current waveform to a reference voltage, and adjust the voltage of the power switch accordingly. By adjusting the voltage of the power switch, the output current waveform is adjusted accordingly and the power factor is improved.

By utilizing both stages of the PFC, the R2A20104SP#W0 is able to maximize its efficiency and reduce the harmonic distortion of the input current waveform. The R2A20104SP#W0 is able to achieve high power factor correction levels with minimal external components, allowing for the minimal use of space and cost.

Conclusion

The R2A20104SP#W0 is a high performance PFC controller, designed for use in small, single-phase power supplies. This device is capable of achieving high power factor correction levels with minimal external components, and is especially suitable for use in non-isolated DC/DC converters, AC/DC switching power supplies, chargers and adapters. The primary stage of the PFC is used to correct the input voltage waveform, while the secondary stage is used to correct the output current waveform. By utilizing both stages, the R2A20104SP#W0 is able to maximize its efficiency and reduce the harmonic distortion of the input current waveform.

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