24-48V to 5V – 3A DC-DC Converter

This is a 24-48V input voltage range 3A output current DC-DC Converter using BD9G341AEFJ IC from ROHM semiconductor. This IC is ideal for high-voltage to low-voltage converter with 3A output current. The pin configuration of the board with 3 Pin horizontal mounting of the regulator is similar to the LM7805 LDO regulator and is suitable to use this IC as a replacement which provides more current and takes high voltage input.

Different voltage outputs are possible by changing a few components. Refer to the datasheet for the same. Example circuit can provide 5.1V/3A with an input supply range of 24-48V DC and an operating frequency of 200KHz.

The BD9G341AEFJ is a buck-switching regulator with integrated 150mΩ power MOSFET. The current mode architecture provides a fast transient response and a simple phase compensation setup. The operating frequency is programmable from 50kHz to 750kHz. Additional protection features are included such as Over Current Protection, Thermal shutdown, and under-voltage lockout. The under-voltage lockout and hysteresis can be set by an external resistor.

Features

• Supply 24-48V DC Input (12-76V Range)
• Output 5.1V/3A
• Pin Configuration is direct replacement LM7805
• Frequency 200kHz.

Schematic

Parts List

Photos

Video

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