RPM40-2405SG

DC-DC converters are an integral component for a variety of applications. Developed to transform direct current from one voltage level to a different level, they have become practical solutions for a wide range of power applications. The RPM40-2405SG is a high efficiency stepped up mode dc-dc converter that is used in computer power systems for mitigating the voltage drops that occur due to current load. This article provides the details on the field of application and working principle of this particular model.

Application Field

The RPM40-2405SG offers isolation and protection to the system, thus a step-up DC-DC converter is suitable and required for applications such as powering point-of-load converters in automotive systems, DC-DC step-up applications in communication systems, power conditioners and UPS systems, signal processing, and desktop PCs.

This converter is especially useful for applications where high efficiency is required with features such as current sharing, remote sensing, noise filtering, and Reverse Input Protection that helps to protect the system from reversecurrents. The product also features low Rds(on) output and low output ripple allowing improved efficiency and power management capability.

The RPM40-2405SG has many operational advantages such as extended ambient temperature range from -40°C to +85°C, configurable output voltage (5V–20V), adjustable current limit, auto restart OCP, small size, low standby power consumption, low leakage current, and high efficiency up to 95.7%.

Working Principle

The RPM40-2405SG is a step-up DC-DC converter, with an input range of 4.5-14V. It is a highly efficient device that converts the input voltage into a higher voltage (5V–20V) output. The operational principle of the converter is based on the buck-boost transformer, which in essence is an electrically operated switch, that is used to step up the input voltage. The transformer consists of four transistors, two capacitors, a diode and various other components. When the four transistors are energized, the two capacitors are charged, forming the electrical energy required for stepping up the input voltage level.

The RPM40-2405SG is a synchronous-rectified buck-boost converter with a single power stage. The synchronous rectification increases the efficiency by reducing the power losses during the operation. The output voltage is regulated by sensing the output voltage and feeding it back to the controller, which is responsible for generating the appropriate pulses for controlling the output voltage.

The device also offers a set of protection features such as overcurrent protection, output short circuit protection, thermal shutdown, over voltage protection and input reverse polarity protection for ensuring that the system is not damaged due to any fault conditions.The integrated FAULT status pin offers a digital signal that indicates the occurrence of a fault condition.

Conclusion

The RPM40-2405SG offers an efficient DC-DC step-up converter with a wide range of features for providing a safe, reliable and efficient system for applications such as powering point-of-load converters in automotive systems, DC-DC step-up applications in communication systems, power conditioners and UPS systems, signal processing, and desktop PCs. The converter provides high efficiency, low Rds(on) output, low output ripple, extended operating temperature range, current sharing, remote sensing, noise filtering, and protection features for ensuring the safety of the system.