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
| Specification | Value |
| Supply Voltage | 14V ~ 39V |
| Max Output Power x Channels @ Load | 100W x 2 @ 6Ohm |
| Frequency Response | 10Hz ~ 100kHz (-3dB) |
| Efficiency | > 90% |
| Gain | 26dB |
| Standby Current | 3µA |
| Operating Temperature | -40°C ~ 85°C |
| Package Type | PowerSSO-36 EPU |
| Input Voltage Range | 0.2V ~ 2V (RMS) |
| Output Impedance | 4Ω ~ 8Ω |
| Output Voltage Swing | 45Vpp |
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.
