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AC DC Converters

AC DC converters are used to convert alternating current electricity into direct current electricity. With the development of modern communications and computer technology, AC DC converters are increasingly used in various fields. The NES-25-48, a type of AC DC converter, is widely used in a variety of applications.

NES-25-48 Application Field

The NES-25-48 is a highly efficient, full-bridge synchronous AC DC converter. It can be used to convert power from 50 to 100 Hz AC power to 48V DC power. This AC DC converter is primarily used in various outdoor applications, which require high reliability and wide input voltage range. It has wider AC input range (85-264 VAC), higher efficiency (up to 93.5%) and excellent power factor (PF=1). It allows for programming of the power output between 40 and 50V, and also provides a wide output power range. The NES-25-48 converter is also suitable for distributed power applications, such as wind power, refrigerators, photocopiers, vending machines and other power-related equipment. It has an integrated Power Quench mode that shuts down input power to the load in the event of an overload.

NES-25-48 Working Principle

The NES-25-48 converter is a full-bridge synchronous AC DC converter. The core of the converter is a gate-controlled inductor, also known as a synchronous rectifier, which reduces the switching losses of the converter by providing low reverse current. The inductor is connected to the input and output terminals of the converter via a diode bridge rectifier. The gate of the inductor is controlled by an internal high-voltage bipolar transistor. When the bipolar transistor is switched on, the gate-controlled inductor is connected to the input and output terminals of the converter for power transfer. The output current of the converter is controlled by an internal control circuit, which is designed to adjust the output voltage, current limit, and power limit of the converter.

The NES-25-48 converter utilizes a synchronous rectification technique to reduce power losses and increase efficiency. This is accomplished by keeping the diode bridge rectifier connected to the input and output terminals of the converter. When the converter is in steady-state operation, the gate-controlled inductor is switched on while the bipolar transistor is switched off. This activates the synchronous rectifier, allowing for the transfer of power from the input to the output terminal of the converter at a higher efficiency. This enables the converter to operate at optimal performance, even in conditions of varying input voltage and frequency.

Conclusion

The NES-25-48 is a highly efficient, full-bridge synchronous AC DC converter that can be used in various outdoor applications requiring wide input voltage range and high reliability. It can convert power from 50 to 100 Hz AC power to 48V DC power. This AC DC converter utilizes a synchronous rectification technique to reduce power losses and increase efficiency. It has wider AC input range (85-264 VAC), higher efficiency (up to 93.5%) and excellent power factor (PF=1). The NES-25-48 converter has an integrated Power Quench mode that shuts down input power to the load in the event of an overload.

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