Overview
The TDA7498MVTR is a mono BTL class-D audio amplifier produced by STMicroelectronics. This device is designed for home audio systems and active speaker applications. It operates with a single power supply and is known for its high efficiency and robust protection features. The amplifier comes in a 36-pin PowerSSO package with an exposed pad up (EPU) to facilitate the mounting of a separate heatsink, enhancing thermal management.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Power (THD = 10%, RL = 6 Ω, VCC = 36 V) | - | - | 100 | W |
| Output Power (THD = 10%, RL = 8 Ω, VCC = 34 V) | - | - | 80 | W |
| Supply Voltage Range | 14 | - | 39 | V |
| Efficiency (η) at Po = 100 W | - | - | 90 | % |
| Total Harmonic Distortion (THD) at Po = 1 W | - | - | 0.1 | % |
| Switching Frequency (Internal Oscillator) | 290 | 310 | 330 | kHz |
| Ambient Operating Temperature Range | -20 | - | 85 | °C |
| Junction Temperature at Thermal Shutdown | - | - | 150 | °C |
Key Features
- High efficiency of up to 90% at 100 W output power.
- Wide-range single-supply operation from 14 to 39 V.
- Four selectable, fixed gain settings: 25.6 dB, 31.6 dB, 35.1 dB, and 37.6 dB.
- Differential inputs to minimize common-mode noise.
- Standby and mute features with very low current consumption in standby mode.
- Protection against overvoltages, undervoltages, overcurrents, and thermal overloads.
- Externally synchronizable with an external oscillator.
- Diagnostic output pin for monitoring protection conditions.
Applications
The TDA7498MVTR is primarily designed for home audio systems and active speaker applications. Its high efficiency, robust protection features, and flexible gain settings make it suitable for a variety of audio amplification needs, including:
- Home audio systems.
- Active speakers.
- Professional audio equipment.
- Automotive audio systems.
Q & A
- What is the maximum output power of the TDA7498MVTR?
The TDA7498MVTR can deliver up to 100 W of output power at THD = 10% with a load of 6 Ω and a supply voltage of 36 V.
- What is the efficiency of the TDA7498MVTR?
The efficiency of the TDA7498MVTR is up to 90% at 100 W output power.
- What are the available gain settings for the TDA7498MVTR?
The TDA7498MVTR offers four selectable, fixed gain settings: 25.6 dB, 31.6 dB, 35.1 dB, and 37.6 dB.
- How does the TDA7498MVTR protect against thermal overload?
The device goes into mute mode and shuts down if the junction temperature reaches 150 °C, and it restarts once the device cools sufficiently.
- Can the TDA7498MVTR be synchronized with an external oscillator?
Yes, the TDA7498MVTR can be externally synchronized using the SYNCLK pin.
- What is the purpose of the diagnostic output pin (DIAG) on the TDA7498MVTR?
The diagnostic output pin (DIAG) is an open-drain transistor that switches to the high impedance state when any protection is activated, allowing for monitoring of protection conditions.
- What are the operating modes of the TDA7498MVTR?
The TDA7498MVTR has three operating modes: standby, mute, and play, controlled by the STBY and MUTE inputs.
- How does the TDA7498MVTR protect against overcurrent conditions?
If the output current exceeds the specified threshold, the overcurrent protection is activated, forcing the outputs to the high impedance state, and the device periodically attempts to restart.
- What is the recommended operating temperature range for the TDA7498MVTR?
The recommended ambient operating temperature range is from -20 °C to 85 °C.
- What package type does the TDA7498MVTR come in?
The TDA7498MVTR comes in a 36-pin PowerSSO package with an exposed pad up (EPU) for heatsink mounting.
