AA4003GTR-E1

Overview

The AA4003GTR-E1 is a Class AB stereo audio power amplifier manufactured by Diodes Incorporated. It delivers 2.0W per channel into a 4Ω load in BTL mode with THD+N less than 1%, or 160mW per channel into a 16Ω load in SE mode. The device operates on a supply voltage range of 2.7V to 5.5V and features external feedback loops for flexible gain configuration. It includes optimized click/pop noise suppression, thermal shutdown protection, and a low-power shutdown mode drawing 0.7µA typical current.

Feature Summary

• Supports switchable Single-Ended (SE) and Bridged-Tied-Load (BTL) output configurations via the HP_SENSE pin logic level.
• Integrates optimized circuits to suppress click and pop noise during power-up and power-down transitions.
• Includes thermal shutdown protection that activates when junction temperature exceeds approximately +170°C.
• Features an active-high shutdown pin that disables bias circuits and reduces quiescent current consumption.

Applications

• Portable DVD players
• Portable media players
• LCD monitors
• Digital photo frames

Procurement Notes

Verify the specific package type required for the application, as the AA4003 series is available in both SOIC-16 and TSSOP-20(EDP) packages. Confirm that the ordering suffix matches the desired packaging format, such as Tape & Reel for surface-mount assembly. Ensure compatibility with the system's operating voltage range between 2.7V and 5.5V before integration.

Selection Notes

Select this component for portable audio applications requiring high efficiency and low distortion. Consider the BTL mode for higher power delivery to main speakers and SE mode for headphone outputs. Evaluate thermal management requirements, particularly for BTL operation at 5V with 4Ω loads, as ambient temperature limits may necessitate PCB copper area optimization for heat dissipation.

Part Context

The AA4003GTR-E1 belongs to the AA4003 product line from Diodes Incorporated, designed specifically for portable multimedia devices. It serves as a compact solution for driving speakers in battery-operated systems. The 'G' suffix indicates the TSSOP-20(EDP) package, while 'E1' denotes lead-free compliance. This part integrates dual channels into a single small footprint to save board space.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.

FAQ

How is the output mode determined?

The AA4003 switches between SE and BTL modes based on the logic level applied to the HP_SENSE pin. A high level sets SE mode, while a low level sets BTL mode.

What is the purpose of the BYPASS pin?

The BYPASS pin connects to an internal reference voltage. Connecting a capacitor here filters internal noise, reduces harmonic distortion, and improves power supply rejection ratio performance.