BD5431EFS-E2

Overview

The BD5431EFS-E2 is a stereo Class-D power amplifier for speakers manufactured by Rohm Semiconductor. It operates within a supply voltage range of +10V to +16.5V and supports load impedances from 4Ω to 16Ω. The device delivers a maximum output power of 17W into a 4Ω load and 10W into an 8Ω load at THD+n=10%. Electrical characteristics include a typical voltage gain of 23.5dB, an internal sampling clock frequency of 250kHz, and a circuit current of 25mA in sampling mode. It utilizes a 44-pin HTSSOP-A package.

Feature Summary

• Supports differential analog and PWM inputs for flexible signal interfacing.
• High efficiency design minimizes heat generation, eliminating the need for external heat sinks.
• Soft-switching technology ensures high-quality muting performance.
• Master/slave function enables synchronous operation when multiple units are used simultaneously.

Applications

• Audio visual equipment
• Office automation equipment
• Communication devices
• Electronic appliances
• Amusement devices

Procurement Notes

Verify component authenticity through authorized channels as this part may be subject to obsolescence notices. Confirm RoHS compliance status and check for specific manufacturing lot codes if required for traceability. Ensure proper handling procedures are followed due to moisture sensitivity classification. Review the latest datasheet revisions before finalizing designs to account for any potential parameter updates or packaging changes.

Selection Notes

Select this component for applications requiring high-efficiency audio amplification without external thermal management. Consider the 4Ω minimum load impedance capability and the availability of both differential analog and PWM input options. Evaluate the master/slave synchronization feature if deploying multiple amplifier units. Ensure the operating temperature range of -40°C to +85°C aligns with the target environment requirements.

Part Context

This integrated circuit belongs to the BD5431 series of stereo Class-D power amplifiers. It is designed for general-use electronic equipment where space constraints and thermal efficiency are critical. The device integrates protection circuits including under-voltage, over-temperature, and output short-circuit detection to ensure reliable operation in standard consumer electronics environments.

Replacement Considerations

Consult official documentation for direct substitutes. Verify pin compatibility and electrical specifications against alternative models from the same manufacturer family before implementation.

FAQ

How does the device handle pop noise during power transitions?

Pop noise generated when the power supply turns on or off is eliminated by setting the MUTEX pin LOW during startup and shutdown sequences.

What protection features are included in the IC?

The IC incorporates Under Voltage Protection, High Temperature Protection (Thermal Shutdown), Output Short Protection, and Output DC Voltage Protection.