EPS-45S-5 Power Supplies - External/Internal (Off-Board)

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AC/DC converters can be divided into two categories, isolated AC/DC converters and non-isolated AC/DC converters. The isolated AC/DC converter typically uses transformer isolation, whereas the non-isolated AC/DC converter employs elements such as capacitors or coils between the output and power input terminals for isolation. The EPS-45S-5 is a non-isolated AC/DC converter. It is a type of switching power supply, also known as a switched-mode power supply (SMPS). It is used to convert AC power from a primary source, typically from mains voltage, to DC power and is usually used to power small electronic devices such as computers, computers\' peripherals and consumer electronic goods.

The EPS-45S-5 is an ideal choice for those electronics that require a high-efficiency, low-noise power supply, as it has a low resistor count and high switching frequency (up to 150KHz). This non-isolated AC/DC converter offers a wide input voltage range of 85-264Vac, making it suitable for many different applications. It can deliver up to 45W of power at peak currents of up to 6A. It has a 3-in-1 new switch mode architecture which makes it highly efficient, with a conversion efficiency of up to 88%. It also has a synchronous rectification feature which further increases its efficiency.

The working principle behind the EPS-45S-5 is the same as other AC/DC converters. The primary stage of the power supply is the AC-DC rectification, or conversion of AC electricity from the mains to DC electricity. This is done using a diode bridge rectifier, which consists of four diodes connected in a specific configuration. The AC voltage is applied across the input terminals of the rectifier and the DC output is generated at the output terminals. The rectified DC voltage is filtered using a capacitor, which removes any remaining AC components and smooths out the ripple voltage.

The next stage of the EPS-45S-5 is the DC-DC conversion. This is done using an inductor-based switching topology in order to step down the voltage. This topology uses a series of transistors and voltage regulation components, such as a feedback loop and a current-sense circuit. The transistors switch on and off at high frequencies, which generate the necessary DC output voltage. The DC voltage is then regulated to the required output voltage using voltage regulation components.

The EPS-45S-5 also features synchronous rectification, which provides additional efficiency to the power supply. This is achieved by replacing the diode rectifiers in the power supply with MOSFETs which are driven by an integrated circuit (IC). The MOSFETs switch on and off in synchronicity with the input voltage which not only reduces the conduction losses through the MOSFETs but also helps reduce the temperature of the device by eliminating the secondary diodes.

In summary, the EPS-45S-5 is a non-isolated AC/DC converter that is used to convert AC power from a primary source of mains voltage to DC power. It features a wide input voltage range of 85-264Vac, up to 45W of power, high switching frequency (up to 150KHz), a 3-in-1 new switch mode architecture with up to 88% conversion efficiency, and synchronous rectification for additional efficiency. This makes it an ideal choice for powering small electronic devices such as computers, computers\' peripherals, and consumer electronics.

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