VSBU-120-D285

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AC/DC converters are designs for high-efficiency and reliable operation; making them especially desirable for applications requiring reliable operation and lower power losses. This article will discuss the application field and working principle of VSBU-120-D285, a hybrid-integrated AC/DC converter, which utilizes a high-voltage unipolar switching topology with a single-switch single-ended design.The VSBU-120-D285 AC/DC converter is designed to operate in applications requiring up to 120V of AC input and up to 285W of output power, with an adjustable output voltage ranging from 2.5V to 33V. It provides outstanding reversible continuous power up to 120W with efficiency surpassing 95%, and a “soft-start” feature for inrush current control. The VSBU-120-D285 is available with a number of options that provide the flexibility required for power solutions, including remote on/off and output voltage margining.The VSBU-120-D285 AC/DC converter utilizes a single-switch single-ended topology, which requires fewer components than traditional topologies. As a result, it is very efficient, with power losses of less than 4%. The converter operates over a wide input voltage range and in addition, the circuit has a brick feed-forward section to reduce the output ripple.The heart of the VSBU-120-D285 AC/DC converter is its switching controller, which consists of a three-channel MOSFET device with an integrated driver. It is designed to be used in flyback, boost, and buck configurations. The controller is used in conjunction with an external self-oscillating voltage feedback (VFB) circuit, which provides regulation of the output voltage.The power factor correction (PFC) is achieved through the use of an advanced MOSFET switch in the topology. This ensures that the device is able to meet the Base Station or other demanding harmonic requirements. Furthermore, it provides an input voltage range of 90-275 volts and supports an active PFC with a power factor of 0.95 at 50% of the rated load.The VSBU-120-D285 AC/DC converter is also capable of providing excellent isolation, with an insulation rating of 5000Vdc, which can be further improved with the use of high-grade components. In addition, it features EMI filters for both the input and output that help meet regulatory standards.Overall, the VSBU-120-D285 AC/DC converter is an advanced high-performance power supply module that provides reliable operation and high efficiency. It is suitable for a wide range of applications, including wireless base stations, medical devices, and networking equipment. Its efficient switching topology, integrated driver, and excellent isolation capabilities make it an attractive solution for high-voltage AC/DC conversion.

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