STK760-304-E

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Power Factor Correction (PFC) is an important technology used in power electronics. It is used to improve the power quality, reduce harmonic current components, and reduce power losses in the electrical circuit. STK760-304-E is a power factor correction (PFC) IC designed to achieve high power efficiency and power conversion accuracy.

The STK760-304-E

The STK760-304-E is an integrated power factor correction circuit that uses a MOSFET as the main switching element and is optimized for use in offline power supplies. The PFC IC includes a MOSFET driver, error amplifier, delayer signal generator, current feedback selector and voltage reference. The PFC IC integrates a number of discrete peripheral circuits, which reduces the size and complexity of the overall power supply design.

Application Field

The STK760-304-E is suitable for offline applications, such as lighting, home appliances and industrial equipment. It is ideal for applications requiring high power efficiency and high power conversion accuracy, such as AC/DC power supplies for switching power supplies, adapters, battery-backed systems and motor drives.

Working Principle

The STK760-304-E regulates the current and voltage waveforms entering the AC input section of the power supply to create a sinusoidal waveform with a high power factor. The voltage and current references are compared against the current feedback signal provided by the current sense resistor. When the difference between the references and the feedback signal is detected, the internal circuit switches the MOSFET on or off to regulate the power supply current.The STK760-304-E also features a voltage-mode control signal generator. This signal generate a pulse-width modulated (PWM) signal that is used to control the MOSFET of the power supply. The signal is based on the voltage feedback from the output voltage detection circuit and is used to maintain the output voltage of the power supply.

Conclusion

The STK760-304-E is an integrated power factor correction IC for use in offline applications. It integrates multiple peripheral circuits, reduces the design complexity, and offers high power efficiency and power conversion accuracy. The STK760-304-E uses voltage-mode control and current-mode control to regulate the current and voltage waveforms at the AC input stage and the MOSFET at the output stage of the power supply.

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