BD78310UEFJ-ME2

Overview

The BD78310UEFJ-ME2 is a single-channel Class AB monaural speaker amplifier designed for automotive applications. It operates within a power supply voltage range of 4V to 5.5V and delivers a maximum output power of 1.6W into an 8Ω load. The device features a fixed voltage gain of 10dB and supports differential input signals. It includes protection functions such as over-current protection, thermal shutdown, and under-voltage lockout (UVLO). The IC is housed in an HTSOP-J8 package with a power pad and is qualified to AEC-Q100 Grade 2 standards, ensuring reliability across an operating temperature range of -40°C to 105°C.

Feature Summary

• Class AB topology eliminates concerns regarding electromagnetic interference noise generation.
• Integrated pop noise reduction function minimizes audible clicks during shutdown transitions.
• Low standby current reduces battery drain when the system is inactive.
• HTSOP-J8 power package design facilitates efficient heat dissipation for high-power output.

Applications

• Automotive interior audio systems
• Vehicle door speaker amplification
• Dashboard or center console sound output

Procurement Notes

Verify that the specific part number matches the required production line variant, as ROHM may update manufacturing lines while maintaining identical electrical characteristics. Confirm the package type is HTSOP-J8 and ensure compliance with AEC-Q100 Grade 2 requirements for your automotive application. Check for any functional safety support documentation if your design requires FS analysis. Always refer to the latest official datasheet for pin configurations and thermal data.

Selection Notes

Select this component for automotive designs requiring a simple, single-channel amplifier solution with minimal external components. The integrated high-side FET and robust protection features simplify board layout. Ensure the load impedance meets the minimum requirement of 4Ω for stable operation. Consider the 10dB fixed gain against your input signal levels. The wide operating temperature range makes it suitable for harsh automotive environments without additional cooling measures.

Part Context

This model is part of the BD783xxEFJ-M series of automotive speaker amplifiers. It shares the same core architecture and electrical specifications as other variants in the family, differing primarily in gain settings and output power capabilities. The 'UEFJ' suffix indicates the specific package and production line configuration. This series is engineered to replace older generations while offering improved efficiency and reduced standby current.

Replacement Considerations

The BD78310EFJ-M is the predecessor model with identical electric characteristics. ROHM recommends using the BD78310UEFJ-ME2 for new developments due to production line updates. No other direct substitutes are documented in the provided sources.