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DC DC Converters

A DC-DC converter is an electronic component that converts a direct current (DC) input voltage into a design ranging form a specific frequency to another DC output voltage. DC-DC converters can consist of different components such as a transformer, diode bridge and capacitors, each of which transfers energy from one stage to the next stage in order to convert the input voltage to the desired output voltage.

RP15-4815SOFW-R

The RP15-4815SOFW-R is a DC-DC converter developed by TDK. It has a wide input voltage range from 6.5V to 14V, and a maximum output current of 20A with a nominal output voltage of 15V. The converter is able to operate in environments with temperatures ranging from -40 to +85 °C and provides up to 91% efficiency. It has a high power density of 1.7W/cm³, and is extremely low profile with a height of 3.6 to 8 mm depending on the version chosen.

Applications

The RP15-4815SOFW-R is suitable for numerous applications due to its high power capabilities. It can be used in automotive electronics, especially in powertrains, electric bikes, power train nodes, aerospace and military applications, and medical devices. Moreover, the ability to operate in a wide temperature range is ideal for use in battery operated or fanless equipment where high efficiency is a priority.

Working Principle

The RP15-4815SOFW-R comprises of two separate power stages which both contain synchronous rectified Buck power stages. In the first stage, the wide input voltage is stepped down by the primary side Buck rectifier to deliver an intermediate voltage while generating a high frequency. This intermediate voltage is then transferred through a transformer and finally rectified by the secondary side Buck rectifier to acquire a regulated output voltage. The entire conversion process is monitored and adjusted by a high efficiency PWM control system, helping to ensure highly stable power supply regardless of environmental and load conditions.

The RP15-4815SOFW-R’s efficiency is further improved by its active-clamp reset in the secondary stage of the Buck rectifier, and its overload protection prevents any sudden changes in load from damaging the circuit. The converter is also designed to have low profile for ease of installation, making it suitable for space-limited applications.

Conclusion

The RP15-4815SOFW-R is a DC-DC converter that is highly advanced with its wide input voltage range, high efficiency and power density, and ability to operate in high temperatures. Its efficient design of two power stages and overload protection make it a suitable choice for applications requiring a high power output, such as automotive electronics, powertrains, aerospace and medical applications. All these features, in combination with its compact size, make the RP15-4815SOFW-R an ideal choice for many applications.

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