The BD5451EFV is a single-channel, high-efficiency Class-D audio amplifier designed by Rohm Semiconductor. It is optimized for portable audio applications such as smartphones, tablets, and portable speakers where low power consumption and high audio quality are essential. This amplifier features a filter-free modulation scheme, reducing the need for external components and simplifying circuit design while maintaining excellent audio performance.

Applications

• Smartphones
• Tablets
• Portable speakers
• Wearable audio devices
• Other battery-powered audio equipment

Features

• High efficiency Class-D operation
• Filter-free modulation scheme
• Low total harmonic distortion plus noise (THD+N)
• Integrated pop noise suppression circuitry
• Short circuit and thermal shutdown protection
• Compact package

Benefits

• Prolonged Battery Life: High efficiency minimizes power consumption, extending the operating time of portable devices.
• Simplified Design: The filter-free architecture reduces the need for external components, saving board space and design time.
• Superior Audio Quality: Low THD+N ensures clear and accurate audio reproduction.
• Robust Protection: Prevents damage to the amplifier and connected speakers from short circuits and overheating.
• Reduced Audible Artifacts: Pop noise suppression minimizes unwanted sounds during startup and shutdown.

Additional Details

The BD5451EFV operates from a 2.5V to 5.5V supply voltage. It is capable of delivering up to 2.6W of output power into a 4Ω load. The amplifier incorporates a shutdown function to further reduce power consumption when not in use. Its compact package makes it suitable for space-constrained applications. The amplifier includes a gain setting using external resistors.