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DC DC Converters

DC–DC converters, also known as DC–DC power supplies, are electronic circuits that are used to provide a stable output voltage from a source of different and changeable input voltage. They have many different application fields, such as electronic devices, communications equipment, DC motor drives, and power supplies. The RP20-4815SF DC-DC converter is a popular choice for applications in the electronics industry because of its high power efficiency, low ripple, fast transient response, and its wide input voltage range.

RP20-4815SF Application Field and Working Principle

The RP20-4815SF is a 15W DC–DC converter that is suitable for commercial, industrial, and military applications. This device has several features that make it well-suited for these applications, including its wide input voltage range of 4.5V to 36V, its full output power capability across the entire operating temperature range of -40°C to 70°C, its high power efficiency of up to 96%, and its fast transient response. In addition, this DC–DC converter comes with a safety system in the form of current and voltages limiting and overtemperature protection.

The working principle of this converter is based on the average current mode of regulation. This is achieved through a series of step-down DC–DC conversion circuits, which are based on switch-mode technology to achieve the desired output voltage. The control feedback loop is based on the Peak Current Mode Control (PCMC). When the load current rises above the reference level, the controller starts to reduce the pulse width of the switches, resulting in a reduction of the output voltage until it reaches the required value. When the current drops below the reference level, the pulse width increases, resulting in an increase in the output voltage. The current in the converter can be set with a resistor connected across the FB pin, which is used to set the current that will be drawn

In summary, the RP20-4815SF DC–DC converter is a highly efficient, high power converter that is suitable for a wide range of applications. It is designed with a wide input voltage range, fast transient response, and a safety system for added protection. The working principle of the converter is based on the average current mode of regulation, which is achieved through a series of step-down DC-DC conversion circuits.

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