Overview
The TDA7498L, produced by STMicroelectronics, is a dual BTL class-D audio amplifier designed for home audio systems and active speaker applications. It operates on a single power supply and is known for its high efficiency and robust protection features. The amplifier is packaged in a 36-pin PowerSSO package with an exposed pad up (EPU) to facilitate the mounting of a separate heatsink. This design ensures effective thermal management, making it suitable for high-power audio applications.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Power (THD = 10%, RL = 6 Ω, VCC = 32 V) | - | - | 80 W | W |
| Output Power (THD = 10%, RL = 8 Ω, VCC = 34 V) | - | - | 70 W | W |
| Supply Voltage (VCC) | 14 | - | 36 | V |
| Ambient Operating Temperature (Tamb) | -20 | - | 85 | °C |
| Efficiency (η) | - | 90% | - | % |
| Gain Settings | 25.6 dB, 31.6 dB, 35.1 dB, 37.6 dB | - | - | dB |
| Input Resistance (Differential Input) | 48 kΩ | 60 kΩ | - | kΩ |
| Switching Frequency (Internal Oscillator) | 290 kHz | 310 kHz | 330 kHz | kHz |
| Thermal Resistance (Junction to Case) | - | 2 °C/W | 3 °C/W | °C/W |
Key Features
- High Efficiency: The TDA7498L offers high efficiency of up to 90%, reducing heat generation and power consumption.
- Wide Range Single-Supply Operation: Operates with a single power supply from 14 V to 36 V.
- Selectable Gain Settings: Four fixed gain settings of 25.6 dB, 31.6 dB, 35.1 dB, and 37.6 dB.
- Differential Inputs: Minimizes common-mode noise.
- Protection Features: Includes standby and mute features, short-circuit protection, thermal overload protection, overvoltage protection, and undervoltage protection.
- External Synchronization: Can be synchronized with an external oscillator for multi-device applications.
- Thermal Management: Exposed pad up (EPU) package for easy heatsink mounting.
Applications
- Home Audio Systems: Ideal for home theaters, soundbars, and other home audio equipment.
- Active Speakers: Suitable for active speaker systems requiring high power and efficiency.
- Professional Audio Equipment: Can be used in professional audio applications such as PA systems and stage monitors.
- Automotive Audio Systems: Applicable in high-power automotive audio systems.
Q & A
- What is the output power of the TDA7498L at THD = 10% with RL = 6 Ω and VCC = 32 V?
The output power is up to 80 W per channel.
- What is the operating temperature range of the TDA7498L?
The ambient operating temperature range is from -20 °C to 85 °C.
- What are the gain settings available for the TDA7498L?
The gain settings are 25.6 dB, 31.6 dB, 35.1 dB, and 37.6 dB.
- Does the TDA7498L have protection features?
Yes, it includes standby and mute features, short-circuit protection, thermal overload protection, overvoltage protection, and undervoltage protection.
- How can the switching frequency of the TDA7498L be controlled?
The switching frequency can be controlled using an internal oscillator or an external oscillator connected to the SYNCLK pin.
- What is the thermal resistance of the TDA7498L from junction to case?
The thermal resistance is typically 2 °C/W and can be up to 3 °C/W.
- Can the TDA7498L be used in multi-device applications?
Yes, it can be synchronized with other devices using an external oscillator.
- What is the input resistance of the differential inputs?
The input resistance is typically 60 kΩ.
- How does the TDA7498L manage thermal issues?
The exposed pad up (EPU) package allows for easy mounting of a separate heatsink.
- What are the typical applications of the TDA7498L?
It is typically used in home audio systems, active speakers, professional audio equipment, and automotive audio systems.
