TPA301D

Overview

The TPA301D is a bridge-tied load (BTL) mono audio power amplifier designed for low-voltage applications. It operates within a supply voltage range of 2.5 V to 5.5 V. At 5 V, it delivers 350 mW into an 8-ohm load with less than 1% THD+N. At 3.3 V, output power is 250 mW into the same load. The device features ultra-low quiescent current in shutdown mode (0.15 µA). It includes thermal and short-circuit protection. The component is housed in an 8-pin SOIC surface-mount package.

Feature Summary

• Bridge-tied load configuration eliminates external coupling capacitors
• Ultra-low shutdown mode current for power-sensitive applications
• Integrated thermal and short-circuit protection mechanisms

Applications

• Cellular communications devices
• Small battery-powered equipment
• Applications requiring internal speakers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's packaging data sheet to confirm tube versus reel availability. Confirm RoHS compliance status and lead finish details via the latest official documentation before finalizing procurement specifications.

Selection Notes

Select this component for narrowband voice applications optimized for cellular communication frequencies. Ensure the design accommodates the BTL topology requirements and provides adequate decoupling for the midrail bypass capacitor to maintain stability and minimize startup pop noise.

Part Context

This part belongs to the TPA301 family of 350-mW mono audio amplifiers. It is specifically engineered for portable electronics where board space and battery life are critical constraints. The SOIC package variant offers standard surface-mount compatibility for general consumer audio circuits.

Replacement Considerations

TPA301DR serves as the taped-and-reeled version of this component. TPA301DGN is available in an HVSSOP package for reduced board area requirements.