BD9G341EFJ-E2

Overview

The BD9G341EFJ-E2 is a discontinued single-channel buck converter IC from ROHM Semiconductor, featuring an integrated N-channel power FET. It supports an input voltage range of 12 V to 76 V and delivers a maximum output current of 3 A. The adjustable output voltage spans from 1 V to 76 V. Operating with a variable switching frequency between 50 kHz and 750 kHz, the device utilizes current-mode control for stable regulation. It is housed in an 8-lead HTSOP-J package with a thermal pad.

Feature Summary

• Integrates an 80 V, 3.5 A, 150 mΩ N-channel MOSFET within a compact surface-mount package.
• Supports wide input voltage ranges suitable for industrial bus architectures.
• Includes comprehensive protection mechanisms such as over-current, under-voltage lockout, and thermal shutdown.

Applications

• Industrial DC/DC conversion systems
• Automotive electronics power supplies
• General-purpose high-voltage step-down applications

Procurement Notes

This component has been officially declared obsolete by the manufacturer. Procurement must rely on secondary market distributors or surplus inventory channels. Verify part authenticity carefully due to potential availability of refurbished units. Confirm that the specific suffix matches the original specifications, as alternative versions may exist with minor parameter variations.

Selection Notes

Designers should transition to the BD9G341AEFJ-E2, which serves as the direct functional replacement. The successor maintains identical electrical characteristics and pinout compatibility while offering current production support. Review the updated datasheet for any subtle differences in recommended operating conditions or thermal performance before finalizing the design.

Part Context

This device belongs to the BD9G341 series of non-synchronous buck converters designed for robust industrial environments. It integrates the controller and power switch to minimize external component count. The family focuses on providing reliable power management solutions where high input voltages are standard.

Replacement Considerations

The BD9G341AEFJ-E2 is the confirmed equivalent substitute. It retains the same pin configuration and electrical parameters, allowing for drop-in replacement in existing designs without schematic modifications.

FAQ

Is the BD9G341EFJ-E2 still in active production?

No, the manufacturer has officially discontinued this part number.

What is the primary difference between the EFJ and AEFJ suffixes?

The AEFJ suffix indicates the current active production version, whereas the EFJ suffix denotes the previously manufactured, now obsolete version.