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AC DC Converters

The MDR-40-12 is an AC DC Converter that is designed to provide isolated, regulated DC power which is capable of delivering up to 40 watts of continuous output power. It can be used for both AC and DC applications such as powering LED signs, appliances, communication systems, and instrumentation. It is a universal input AC DC converter, meaning it can take in both AC or DC voltage inputs, regardless of input voltage range. It is designed to operate from either 90 to 265 VAC or 80 to 375 VDC.

MDR-40-12 Application Field and Working Principle

The MDR-40-12 AC DC Converter is designed to provide a cost-effective solution for powering various types of DC-powered electronic devices. It has a wide range of applications, from powering LED lighting to powering communications, instrumentation, and other types of equipment. The MDR-40-12 is designed to provide reliable, isolated DC power which is adjustable from 0 to 42 VDC with a maximum current of 0.95 A. It has a wide operating temperature range of -10 to 85°C.

The MDR-40-12 is powered by a conventional transformer-based topology with an input ranging from 90 to 265 VAC or 80 to 375 VDC. The topology used is an isolated flyback topology, which ensures that the output voltage is regulated independently of the input voltage. This is achieved by a combination of the following features:

• A primary switch to enable/disable the DC converter
• A transformer for electrical isolation
• A synchronous rectification circuit
• A controller IC to regulate the output voltage

The MDR-40-12 uses a control loop-based primary switch, which monitors the output voltage and adjusts the primary switches to ensure that the output remains regulated. The transformer is used to isolate the input and output circuits. The synchronous rectification circuit helps to reduce power losses and increase efficiency by using MOSFETs as the main switching elements, instead of traditional thyristors or diodes. The controller IC monitors the output current and voltage, ensuring that the output remains within the pre-set range.

The MDR-40-12 is designed to be reliable and efficient. It is designed to meet the stringent requirements of the medical, industrial, and other applications where voltage regulation is critical. It provides protection against input overvoltage, output short circuits, over-temperature, and over-current. It also includes comprehensive EMC (electromagnetic compatibility) filtering to ensure that the converter meets the highest standards of safety and emissions requirements.

In conclusion, the MDR-40-12 AC DC Converter is a cost-effective solution for providing regulated, isolated DC power which can be used for powering DC-powered devices. It is designed to operate from either AC or DC inputs, and has a wide temperature range and comprehensive EMC filtering. It is reliable and efficient, making it an ideal choice for industrial and medical applications where voltage regulation is critical.

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