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DC DC Converters

DC-DC converters are widely used in a variety of applications and can be found in a range of industrial and consumer devices. They are a type of power conversion device that can convert a DC input voltage to an output voltage of a different value required for a particular application. The VRAH-03A2500 DC-DC converter is one such device and is primarily designed for use in medical devices.

Applications

The VRAH-03A2500 DC-DC converter is a medical-grade isolated flyback converter designed for use in medical device applications. It can be used in equipment such as sickroom beds, power chair frames and other medical accessories and provides the ideal foundation for the supply of DC power in a wide range of medical conditions. It is designed to meet the stringent demands of medical equipment including low leakage current, high power efficiency and high reliability. It is also equipped with a wide input voltage range from 200VAC to 250VAC and can supply up to 250W of output power with a nominal 24VDC output voltage.

Features

The VRAH-03A2500 DC-DC converter offers a range of features that make it an excellent option for medical applications. It has a dual-mode capability which allows it to switch between discontinuous mode and continuous mode depending on the load; this ensures high power efficiency and reliability. The device also features an active input power factor correction circuit which reduces input current distortion; this improves the power factor and reduces the total harmonic distortion thereby increasing energy efficiency. The device also includes overvoltage, overcurrent and short circuit protection, allowing it to provide a reliable power output regardless of load variations.

Operating Principle

The working principle behind the VRAH-03A2500 DC-DC converter is similar to that of other isolated flyback converters. When the device is powered up, a charging current is applied to an inductor, which stores the energy within. This energy is then tapped off from the inductor and passed through a secondary winding, where it is rectified to produce a DC output voltage. This output voltage is then regulated by a feedback loop which compares the output voltage to a pre-defined value; if the output voltage deviates from this setpoint, the feedback loop adjusts parameters such as the switching frequency and duty cycle so as to maintain the output voltage within the setpoint.

Conclusion

The VRAH-03A2500 DC-DC converter is an ideal power solution for medical device applications due to its wide range of features and excellent performance. Its active input power factor correction circuit and wide input voltage range make it particularly well suited for medical purposes. The device is also equipped with overvoltage, overcurrent and short circuit protection to ensure reliable and safe operation. The working principle of the device is also analogous to other isolated flyback converters, with the output voltage being regulated by a feedback loop to maintain the setpoint.

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