MPB125-4350G

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AC and DC converters are a crucial part of many systems, from industrial applications to consumer electronic devices. The MPB125-4350G is one such device, a DC-DC converter used in the high power, short circuit and low noise requirements of modern systems. This article provides an overview of the MPB125-4350G, including its application field and working principle.

The MPB125-4350G is an isolated step-down DC-DC converter designed for high current and high power applications. It is capable of delivering up to 12A continuous current at selectable output voltages ranging from 0.5V to 10.0V. The built-in protection circuit prevents overvoltage, overcurrent and short circuit in case of abnormal operation. It has an efficiency up to 92% and an adjustable switching frequency from 200kHz to 500kHz. The MPB125-4350G is an isolated device, meaning it allows the output to be isolated from the input, preventing the noisy ground loops that can cause interference in audio or electronic systems. This is especially useful in the audio appliance industry, where clean and quiet power is essential.

The MPB125-4350G is typically used in applications where high current and high power are required. These include automotive electronics, industrial motor control, portable medical devices and telecommunications systems. The MPB125-4350G is also suitable for high power, high efficiency applications where long life and low noise are needed, such as server power supplies and LED lighting.The MPB125-4350G also has a wide range of features designed to make it easy to use: active power factor correction, a low ripple output waveform, low start-up current, and diode emulation mode.

The working principle of the MPB125-4350G is simple. It contains two main elements—an inductor and a high-speed semiconductor switch—operating according to the principle of boost-buck voltage conversion. During operation, the switch is rapidly toggled between fully “on” and fully “off” states, called “times”. This creates a series of pulses, tracing out an alternating-current waveform with a repetition frequency set by an internal clock. The switching frequency can also be synchronized with an external oscillator for applications requiring a precise output frequency. In boost mode, the inductor charges the input voltage, creating a voltage step-up; in buck mode, the inductor discharges the input voltage, creating a voltage step-down. The output voltage is then regulated by varying the duty cycle of the pulses: a higher duty cycle produces more energy and hence a higher output voltage.

The MPB125-4350G is an efficient and robust DC-DC converter suitable for a wide range of applications. Its wide range of features, including the ability to vary its output voltage, makes it a versatile device for a variety of applications. Furthermore, its high efficiency, low noise operation, and built-in protection make it a reliable and durable device.

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