TPA751GQSR

Overview

The TPA751GQSR is a bridge-tied load (BTL) audio power amplifier designed for low-voltage applications. It operates within a supply voltage range of 2.5 V to 5.5 V and delivers up to 700 mW into an 8-ohm load at 5 V, or 250 mW at 3.3 V. The device features a shutdown mode with ultralow supply current of 1.5 nA. It includes thermal and short-circuit protection, differential inputs, and a unity-gain bandwidth of 1.4 MHz.

Feature Summary

• Bridge-tied load configuration eliminates the need for external output coupling capacitors.
• Shutdown mode provides ultralow supply current for power-sensitive applications.
• Integrated thermal and short-circuit protection ensures operational reliability.

Applications

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

Procurement Notes

Verify the MicroStar Junior package designation and suffix against official documentation. Confirm that the component matches the specific BGA footprint requirements for your PCB layout. Ensure compatibility with the intended supply voltage range before integration.

Selection Notes

Select this component for designs prioritizing high output power in small form factors without external capacitors. Consider the MicroStar Junior package for space-constrained layouts. Verify thermal dissipation capabilities relative to the expected RMS power levels in the target application environment.

Part Context

The TPA751 series comprises Class-AB audio amplifiers optimized for voice band frequencies. The GQS variant specifically utilizes the MicroStar Junior BGA package. This family addresses the demand for efficient, compact audio solutions in portable electronics where board space and battery life are critical constraints.

Replacement Considerations

TPA751DGN

FAQ

How does the BTL configuration benefit the circuit design?

The BTL configuration cancels DC offsets, eliminating the need for bulky external coupling capacitors and minimizing PCB area while doubling the voltage swing across the load.

What is the supply current during shutdown?

The supply current drops to 1.5 nA when the SHUTDOWN pin is held low, making it suitable for power-sensitive applications.