SG6980SZ

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SG6980SZ is an efficient active PFC controller which is specially designed to improve the performance of the electronic power supplies. As power factor is becoming increasingly important, SG6980SZ is widely used in medium to high power applications ranging from 15W to 2000W to ensure improved energy efficiency, tighter regulation, and greater system reliability. In this article, we will discuss the application field and working principle of SG6980SZ.

Application Field of SG6980SZ

The wide input voltage range of SG6980SZ, which is from 9V to 480V, makes it suitable for many kinds of applications such as PC SMPS, adapters, lighting, appliance, electric power meter, industrial power supply and electric power plants. SG6980SZ is also designed to be highly efficient, with a typical efficiency of over 99.5%, ensuring system reliability, tight regulation, and improved energy efficiency.

Working Principle of SG6980SZ

SG6980SZ is based on buck-boost topology. The primary side of the converter consists of an active PFC switch, an inductor, an RF choke and a PFC network. The secondary side consists of a synchronous rectifier, an output capacitor, an over-current protection (OCP) circuit, an over-voltage protection (OVP) circuit, and an internal temperature sensor. The active PFC switch is controlled by the SG6980SZ’s internal analogue PFC controller. The controller detects the value of the input current and the PFC network gives the switching on/off signal to the active switch according to this value. The synchronous rectifier rectifies the voltage and provides the power for the output stages. The output capacitor filters and stabilizes the voltage. The OCP circuit monitors the output current and gives the signal for over current protection. The OVP circuit monitors the output voltage and gives the signal for over voltage protection.

The working principle of SG6980SZ is quite different from the traditional buck-boost topology. The active switch is controlled by the SG6980SZ’s internal analogue PFC controller, which makes the PFC stage more efficient and reliable. With the SG6980SZ, the active switch automatically selects the operating mode according to the input current. This helps to improve the overall efficiency and reduce the switching losses. Therefore, SG6980SZ is ideal for medium to high power applications, where efficiency and tight regulation are required.

Conclusion

In conclusion, SG6980SZ is a highly efficient active PFC controller which is specially designed to improve the performance of electronic power supplies. The wide input voltage range and the high efficiency make it suitable for medium to high power applications ranging from 15W to 2000W.

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