TDA7498L

Overview

The TDA7498L is a dual BTL Class-D audio amplifier designed for single-supply operation in home systems and active speakers. It delivers 80W + 80W output power at THD=10% with RL=6Ω and VCC=32V, or 70W + 70W with RL=8Ω and VCC=34V. Operating on a wide-range supply of 14V to 36V, it achieves high efficiency (η=90%). The device features four selectable fixed gain settings: 25.6dB, 31.6dB, 35.1dB, and 37.6dB. Differential inputs minimize common-mode noise, while standby and mute functions reduce power consumption. Protection includes short-circuit and thermal overload safeguards.

Feature Summary

• High-efficiency Class-D architecture with exposed-pad-up PowerSSO-36 package facilitating separate heatsink mounting
• Differential input configuration to minimize common-mode noise interference
• Externally synchronizable switching capability for system integration flexibility
• Integrated standby and mute modes for power management

Applications

• Home audio systems
• Active speaker applications

Procurement Notes

Verify the specific suffix (e.g., TR) against the required packaging format such as tape and reel or cut tape. Confirm the operating temperature range matches the application environment, typically -40°C to +85°C. Ensure the design supports the 36-pin PowerSSO EPU footprint and provides adequate thermal dissipation via an external heatsink due to the exposed pad structure.

Selection Notes

Select this component for high-power stereo audio applications requiring efficient single-supply operation. The differential input stage is suitable for noisy environments. Verify that the load impedance and supply voltage align with the specified 80W or 70W output ratings. Consider the need for an external heatsink given the PowerSSO-36 EPU package design.

Part Context

The TDA7498L belongs to STMicroelectronics' line of Class-D audio amplifiers, which utilize switch-mode technology to improve efficiency and reduce heat generation compared to linear amplifiers. This series targets consumer electronics where high power density and low thermal dissipation are critical requirements.

Replacement Considerations

The TDA7492 is a related dual BTL Class-D amplifier in the same family. While it shares similar protection features and package options, its output power is lower (50W + 50W). Verify if the reduced power rating meets the application requirements before substitution.