RN-3.324S Power Supplies - Board Mount

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DC-DC converters have become increasingly popular in recent years as they provide a reliable and efficient way to convert a voltage or current from one form to another. The RN-3.324S is a special case: a step down DC-DC converter capable of operating with a wide input voltage range to produce a regulated output voltage. The device is designed for applications such as portable medical devices and industrial embedded computers that require high-isolation and good power supply regulation.

Building Blocks

The RN-3.324S is based on a standard Buck (step-down) regulator topology. Its building blocks consist of an inductor, diode, and MOSFET. The input voltage is regulated by an input capacitance filter and then applied to the primary side of the power inductor, with the MOSFET switching the inductor to regulate the output voltage. The MOSFET is controlled by a low-cost gate driver IC that contains the necessary logic to control the switching. The diode is used to allow current to continue to flow to the output during the “off” time of the MOSFET, allowing for a smooth transition between the input and output voltages.

Applications

The RN-3.324S has many applications, especially in the medical and industrial fields. It is used in portable medical devices such as blood pressure monitors, heart rate monitors, and glucose meters. It is also used in industrial embedded computers such as programmable logic controllers (PLCs) and as a power supply for motor drives. The device is also well suited for line powered applications such as LED lighting or battery powered applications.

Features and Benefits

The RN-3.324S offers a wide input voltage range of 4.5-36V, making it suitable for many different application scenarios. It has a wide output voltage range of 0.7-30V and is capable of delivering up to 5A of continuous current at full load. The device offers excellent noise immunity, with an integrated EMI filter for reducing the amount of disruptive noise. It also has a high efficiency of up to 97%, helping to reduce system losses and minimize the cooling requirement for the device.

Working Principle

The RN-3.324S works by using the inductor to convert the current from the power source (input) to the load (output). The input current is switched by the MOSFET, with the diode allowing current to reach the output during the “off” time of the MOSFET. The frequency of the switching is controlled by the gate driver IC to ensure an accurate output voltage. As the output voltage increases, the MOSFET is opened and current is stored in the inductor. As the output voltage decreases, the MOSFET is closed to allow the current to be discharged.

Conclusion

The RN-3.324S is a reliable and efficient DC-DC converter that offers a wide range of input and output voltages, high efficiency, and excellent noise immunity. It is well suited for many applications such as portable medical devices and industrial embedded computers, and offers a low cost solution for many power supply needs.

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