Overview
The TDA7498TR, produced by STMicroelectronics, is a dual BTL class-D audio amplifier designed for home systems and active speaker applications. It operates on a single power supply and is packaged in a 36-pin PowerSSO36 with an exposed pad up (EPU) to facilitate the mounting of a separate heatsink. This amplifier is known for its high efficiency, wide-range single-supply operation, and multiple gain settings, making it a versatile choice for various audio applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Power (THD = 10%, RL = 6 Ω, VCC = 36 V) | 100 W + 100 W | W |
| Output Power (THD = 10%, RL = 8 Ω, VCC = 34 V) | 80 W + 80 W | W |
| Supply Voltage Range | 14 - 39 V | V |
| Efficiency | 90% | % |
| Gain Settings | 25.6 dB, 31.6 dB, 35.1 dB, 37.6 dB | dB |
| Input Resistance | 48 kΩ - 60 kΩ | kΩ |
| Operating Temperature Range | -40 to 85 °C | °C |
| Package | PowerSSO36 (EPU) | |
| Quiescent Current (No LC filter, no load) | 40 - 60 mA | mA |
| Thermal Shutdown Junction Temperature | 150 °C | °C |
Key Features
- Differential inputs to minimize common-mode noise
- Standby and mute features with low current consumption in standby mode
- Short-circuit protection and thermal overload protection
- Externally synchronizable clock for multi-amplifier systems
- Four selectable, fixed gain settings
- High efficiency (η = 90%)
- Open-drain diagnostic output and supply voltage rejection
Applications
The TDA7498TR is designed for use in home audio systems and active speaker applications. Its high power output, high efficiency, and robust protection features make it suitable for a variety of audio equipment, including home theaters, soundbars, and professional audio systems.
Q & A
- What is the maximum output power of the TDA7498TR?
The TDA7498TR can deliver up to 100 W + 100 W output power at THD = 10% with RL = 6 Ω and VCC = 36 V.
- What is the operating temperature range of the TDA7498TR?
The operating temperature range is -40 to 85 °C.
- What are the gain settings available on the TDA7498TR?
The gain settings are nominally 25.6 dB, 31.6 dB, 35.1 dB, and 37.6 dB.
- Does the TDA7498TR have protection features?
Yes, it includes short-circuit protection and thermal overload protection.
- Can the TDA7498TR be synchronized with external clocks?
Yes, the TDA7498TR can be externally synchronized for use in multi-amplifier systems.
- What is the typical quiescent current of the TDA7498TR in standby mode?
The quiescent current in standby mode is typically 1 - 10 µA.
- What package type is the TDA7498TR available in?
The TDA7498TR is available in a 36-pin PowerSSO36 package with an exposed pad up (EPU).
- How is the gain of the TDA7498TR set?
The gain is set by the two inputs, GAIN0 and GAIN1, which change the feedback resistors of the amplifier.
- What is the input resistance of the TDA7498TR?
The input resistance is typically 48 kΩ to 60 kΩ.
- Does the TDA7498TR have a diagnostic output?
Yes, it has an open-drain diagnostic output.
