BD88420GUL-E2

Overview

The BD88420GUL-E2 is a stereo, Class-B audio amplifier designed for coupling capacitorless headphone applications. It operates on a single power supply ranging from 2.4 V to 5.5 V and delivers 80 mW per channel into a 16 Ω load. The device features an integrated adjustable charge pump that generates a negative voltage rail from the positive supply, enabling ground-referenced output without external coupling capacitors. Key electrical specifications include a total harmonic distortion plus noise (THD+N) of 0.006%, a signal-to-noise ratio of 101 dB, and a standby current of 0.1 µA. It utilizes a VCSP50L2-14 package.

Feature Summary

• Integrates an adjustable charge pump circuit to generate a negative voltage rail directly from the positive power supply, eliminating the need for large external output coupling capacitors.

Applications

• Mobile phone audio systems
• Portable electronic devices

Procurement Notes

Verify component authenticity through authorized ROHM Semiconductor distributors or certified partners. Confirm the specific suffix E2 indicates RoHS compliance and lead-free status as per official datasheets. Ensure the ordering quantity aligns with standard taping packaging requirements. Request original manufacturer documentation to validate part history and traceability before finalizing procurement contracts.

Selection Notes

Select this component when minimizing board space and cost by removing bulky output capacitors is critical. It is suitable for battery-powered portable electronics requiring high-fidelity audio reproduction with low distortion. Verify that the application environment remains within the specified -40°C to +85°C operating temperature range. Ensure the load impedance meets the minimum requirement of 16 Ω for optimal performance.

Part Context

This component belongs to the BD88420GUL series of coupling capacitorless headphone amplifiers manufactured by ROHM Semiconductor. It is classified as a standard-grade product intended for general consumer electronics. The datasheet explicitly states that this product is not recommended for use in automotive equipment. It serves as a compact solution for mobile audio interfaces where size constraints are significant.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult official ROHM Semiconductor resources for potential cross-reference options or updated series replacements.