TDA7498 Class-D Audio Amplifier: Pinout, Diagram and Features

TDA7498 Introduction

The TDA7498 is a dual BTL class-D audio amplifier for home audio systems and active speaker applications. It operates with a single power supply, offering energy efficiency while delivering high-quality audio performance. 

The amplifier is housed in a 36-pin PowerSSO package with an exposed pad-up (EPU) design, allowing for effective heat dissipation with the addition of a separate heatsink. The TDA7498 also includes built-in protection features, such as short-circuit and over-temperature protection.

TDA7498 Symbol

TDA7498 Footprint

TDA7498 3D Model

TDA7498 Pinout

SUB_GND: Connect to the frame 

OUTPB: Positive PWM for right channel 

PGNDB: Power stage ground for right channel 

PVCCB: PWR Power supply for right channel 

OUTNB: Negative PWM output for right channel 

OUTNA: Negative PWM output for left channel 

PVCCA: Power supply for left channel 

PGNDA: Power stage ground for left channel 

OUTPA: Positive PWM output for left channel 

PGND: Power stage ground 

VDDPW: 3.3-V (nominal) regulator output referred to ground for power stage

STBY: Standby mode control

MUTE: Mute mode control 

INPA: Positive differential input of left channel 

INNA: Negative differential input of left channel 

ROSC: Master oscillator frequency-setting pin 25 SYNCLK I/O Clock in/out for external oscillator

VDDS: 3.3-V (nominal) regulator output referred to ground for signal blocks

SGND: Signal ground

DIAG: Open-drain diagnostic output 

SVR: Supply voltage rejection 

GAIN0: Gain setting input 1 

GAIN1: Gain setting input 2 

INPB: Positive differential input of right channel 

INNB: Negative differential input of right channel 

VREF: Half VDDS (nominal) referred to ground 

SVCC: Signal power supply 

VSS: 3.3-V (nominal) regulator output referred to power supply

EP: Exposed pad for heatsink, to be connected to ground

TDA7498 Block Diagram

TDA7498 Test/Application Circuit

TDA7498 Specification

TDA7498 Features

• 100 W + 100 W output power at THD = 10% with RL = 6 Ω and VCC = 36 V 

• 80 W + 80 W output power at THD = 10% with RL = 8 Ω and VCC = 34 V 

• Wide-range single-supply operation (14 - 39 V) 

• High efficiency (η = 90%) 

• Four selectable, fixed gain settings of nominally 25.6 dB, 31.6 dB, 35.1 dB and 37.6 dB 

• Differential inputs minimize common-mode noise 

• Standby and mute features 

• Short-circuit protection 

• Thermal overload protection 

• Externally synchronizable

TDA7498 Application

Home Audio and Hi-Fi Systems

Active Speakers

Portable and Battery-Powered Audio Systems

Television and AV Receivers

Automotive Audio Systems

Public Address (PA) Systems

DIY and Custom Audio Projects

TDA7498 Package

The TDA7498 comes in a PowerSSO-36 EPU package. This package features 36 pins arranged to optimize electrical and thermal performance, with an exposed pad on the top for attaching an external heatsink. The dimensions of the PowerSSO-36 EPU package are 9.0mm x 9.0mm (length x width), with a 1.0mm pitch between pins. The exposed pad allows for better thermal management by improving the heat dissipation from the internal components to the PCB.

TDA7498 Manufacturer

The TDA7498 is manufactured by STMicroelectronics, a well-known company in the electronics industry. STMicroelectronics has built a solid reputation for producing high-quality, reliable components, and the TDA7498 is no exception.

FAQs

What is the TDA7498? 

The TDA7498 is a dual BTL (Bridge-Tied Load) class-D audio amplifier designed by STMicroelectronics. 

Can I use the TDA7498 in a stereo system? 

Yes, the TDA7498 is designed for stereo audio applications, offering dual channels for a full-range audio experience in home theater or active speaker setups.

How should the TDA7498 be mounted for optimal performance? 

It's recommended to use a heatsink with the TDA7498 for proper thermal management, as high power output can generate heat during extended use.