BD5423AEFS-E2

Overview

The BD5423AEFS-E2 is a two-channel Class-D audio amplifier manufactured by ROHM Semiconductor, designed for high-efficiency speaker amplification in space-constrained applications. It operates on a single power supply ranging from 10 V to 16.5 V and delivers up to 17 W per channel into a 4 Ω load or 10 W per channel into an 8 Ω load. The device features a gain of 28 dB, total harmonic distortion plus noise of 0.1%, and a quiescent current of 25 mA. Housed in a 44-pin HTSSOP-A package with exposed pad for thermal management, it functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Achieves 90% efficiency at 10W+10W output with an 8Ω load through advanced BCD process technology minimizing internal losses.
• Delivers maximum 34W total output without requiring external heat sinks due to low heat generation design.
• Incorporates soft-switching technology to reduce pop noise during power on/off and implement high-quality audio muting.
• Includes built-in protection circuits against over-temperature, VCC/GND shorting, undervoltage, and DC voltage application.

Applications

• Ultra-slim television sets requiring compact form factors
• Audio systems demanding reduced component size and weight
• Equipment prioritizing low heat generation without active cooling

Procurement Notes

Verify the specific suffix E2 indicates RoHS compliance and lead-free status as per manufacturer specifications. Confirm the 44-pin HTSSOP-A package dimensions match your PCB footprint requirements. Ensure the design supports the required 10V to 16.5V single supply voltage range. Check humidity sensitivity level (MSL 3) constraints for storage and reflow soldering profiles.

Selection Notes

Select this component when high efficiency and minimal thermal dissipation are critical for thin-profile designs. It is suitable for stereo audio applications driving 4Ω or 8Ω loads directly. Consider the master/slave synchronization feature if multiple units are used to mitigate beat noises. Verify that the analog input interface aligns with your signal source capabilities.

Part Context

This part belongs to the BD54 series of Class-D speaker amplifiers from ROHM Semiconductor. It is specifically engineered for consumer electronics where space and thermal constraints are significant. The BD5423AEFS variant serves as the base model, with the E2 suffix denoting environmental compliance attributes.

Replacement Considerations

The BD5423AEFS is listed as an alias for this component. No other direct substitute part numbers are confirmed in the provided documentation.