VOF-300-12 Power Supplies - External/Internal (Off-Board)

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AC-DC converters are devices that convert an AC electrical source into a DC electrical source in order to achieve a particular end-use purpose. A prominent example of such a converter is the VOF-300-12 AC-DC converter. Its application field and working principle are outlined below.

The VOF-300-12 is a 12V, 300-watt AC-DC converter, operating in open-frame, linear topologies. Its specified output voltage is 12V and 3-15A. Moreover, it is capable of providing a certain output voltage regulation in the range of ±100mV or ±20V, and has a no-load power consumption of 2 watts. This makes it ideal for a variety of applications, such as powering computer systems, automotive electronics, and household appliances.

The VOF-300-12 uses a two-transistor, full-wave rectifier and a three-terminal regulator as its functional blocks. The full-wave rectifier is a strong bridge rectifier with a large collector-emitter current capability. It converts the alternating input voltage into a direct one by blocking the negative half of the AC input wave. As a result, it enables the smooth conversion of AC to DC without any interference. On the other hand, the three-terminal regulator is used to regulate the output voltage levels by controlling the base current of the transistors. This keeps the output within the specified limits.

In addition to AC-DC conversion, the VOF-300-12 also features input voltage transient protection, output short circuit protection, and output over-current and over-voltage protection. This makes it highly suitable for use in harsh environmental conditions, such as power outages, lightning strikes, and high ambient temperatures. Furthermore, its wide operating temperature range of -25℃ to 85℃ makes it suitable for a number of industrial and commercial applications.

In conclusion, the VOF-300-12 is a highly reliable AC-DC converter that can be used for a variety of purposes. Its full-wave rectifier and three-terminal regulator provide a highly efficient conversion of AC-DC power and enable the device to maintain its output within specified limits. In addition, its features such as transient protection, short circuit protection, and over-current and over-voltage protection make it ideal for use in harsh environmental conditions.

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