BD5423EFS-E2

Overview

The BD5423EFS-E2 is a Class-D stereo audio amplifier IC manufactured by Rohm Semiconductor. It operates on a single power supply ranging from 10V to 16.5V and delivers up to 17W per channel into a 4-ohm load, or 10W per channel into an 8-ohm load. The device features a fixed gain of 28dB and utilizes a 44-pin HTSSOP-A package with exposed pads for thermal management. It supports analog input signals and includes built-in protection circuits against over-temperature, short circuits, and low voltage conditions.

Feature Summary

• High efficiency design achieving 90% efficiency at 10W output with an 8-ohm load, minimizing internal losses through advanced BCD process technology.
• Integrated soft-switching technology reduces pop noise during power-on/off events and ensures high-quality audio muting.
• Master/slave synchronization function allows multiple devices to operate in sync, effectively reducing beat noises in multi-unit systems.
• Built-in output power limiter protects speakers from excessive output, while adjustable PWM sampling clock frequencies facilitate protective measures.

Applications

• Ultra-thin television sets requiring space-saving and low heat generation
• Home audio systems demanding high sound quality and compact form factors
• Portable speaker systems utilizing single-supply operation

Procurement Notes

Verify the current lifecycle status before procurement, as documentation indicates this specific part number may be marked as Not Recommended for New Designs (NRND). Confirm availability through authorized distributors and check for active replacement recommendations from Rohm Semiconductor. Ensure compliance with RoHS3 specifications and moisture sensitivity level requirements during storage and handling.

Selection Notes

Select this component for applications requiring high-power stereo amplification within a compact surface-mount footprint. The 44-pin HTSSOP-A package provides necessary thermal dissipation capabilities without external heatsinks for typical loads. Consider the fixed 28dB gain and analog input interface when designing signal conditioning stages. Evaluate the operating temperature range of -40°C to 85°C against environmental constraints.

Part Context

This IC belongs to the BD54 series of Class-D audio amplifiers from Rohm Semiconductor. The series is characterized by high-efficiency BCD technology and integrated protection features. The BD5423 variant specifically targets high-output stereo applications, offering a balance between power delivery and thermal performance in thin electronic devices.

Replacement Considerations

Documentation lists BD5423AEFS-E2 as a recommended alternative. Verify pin compatibility and electrical specifications before substitution. Check for any differences in packaging or thermal characteristics that might impact existing board designs.