AA4003MTR-G1

Overview

The AA4003MTR-G1 is a Class AB stereo audio power amplifier manufactured by Diodes Incorporated. It delivers 2.0W per channel into 4Ω loads in BTL mode with THD+N less than 1%, or 160mW per channel into 16Ω loads 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.
• Features thermal shutdown protection that activates when junction temperature exceeds approximately +170°C.
• Provides extremely low power consumption in shutdown mode, typically 0.7µA.

Applications

• Portable DVD Players
• Portable Media Players
• LCD Monitors
• Digital Photo Frames

Procurement Notes

Verify the specific package type required for your design, as the AA4003 is available in both SOIC-16 and TSSOP-20(EDP). Confirm that the ordering suffix matches your needs; 'MTR' indicates Tape & Reel packing in the SOIC-16 package. Ensure compatibility with RoHS standards if environmental compliance is mandatory for your assembly process.

Selection Notes

Select this component for portable applications requiring high efficiency and minimal external components. Consider the BTL mode for higher power delivery to main speakers and SE mode for headphone outputs. Evaluate thermal dissipation requirements carefully, especially in BTL mode with low impedance loads, as heat sinking may be necessary to maintain safe operating temperatures.

Part Context

The AA4003 is part of Diodes Incorporated's portfolio of audio amplifiers designed for consumer electronics. It serves as a compact solution for driving speakers in battery-operated devices where space and power efficiency are critical constraints. The device integrates multiple protections and features to simplify system design and enhance user experience.

Replacement Considerations

Direct replacements include other models from the Diodes Incorporated AA series or comparable stereo audio amplifiers offering similar power output and supply voltage ranges. Verify pinout compatibility and thermal characteristics before substitution.

FAQ

How is the output mode (SE or BTL) determined?

The output mode is controlled by the logic level on the HP_SENSE pin. A low level sets the chip to BTL mode, while a high level sets it to SE mode.

What is the purpose of the BYPASS pin?

The BYPASS pin connects to an internal reference voltage. Connecting a capacitor (typically 1.0µF) to ground filters internal noise, reduces harmonic distortion, and improves power supply rejection ratio.

How does the device handle thermal overload?

The AA4003 includes thermal shutdown protection. If the junction temperature exceeds approximately +170°C, the device shuts down to limit total power dissipation and prevent damage.