Overview
The TDA7492ETR is a dual BTL (Bridge-Tied Load) class-D audio amplifier produced by STMicroelectronics. This device is designed for home audio applications and features a single power supply operation with a wide voltage range of 7 to 26 volts. It is housed in a 36-pin PowerSSO package with an exposed pad up (EPU) for efficient heat dissipation. The TDA7492ETR is known for its high efficiency, which allows for a simple heatsink design. It supports various output configurations, including stereo BTL and parallel BTL (mono) setups, making it versatile for different audio system requirements.
Key Specifications
| Parameter | Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| VCC | Supply voltage for pins PVCCA, PVCCB, SVCC | - | 7 | 26 | V |
| Iq | Total quiescent current without LC, no load | - | - | 40 | mA |
| IqSTBY | Quiescent current in standby | - | - | 1 | µA |
| IOCP | Overcurrent protection threshold | 9 | 10 | 13 | A |
| Tj | Junction temperature at thermal shutdown | 140 | 150 | 160 | °C |
| GV | Closed-loop gain | 20.8 | - | - | dB |
| fSW | Switching frequency | - | 500 | - | kHz |
Key Features
- Wide-range single-supply operation: From 7 to 26 volts.
- Output configurations: Supports 2 x PBTL and 1 x Parallel BTL configurations.
- High efficiency: Reduces the need for complex heatsink designs.
- Gain settings: Four selectable, fixed-gain settings of nominally 20.8 dB, 26.8 dB, 30 dB, and 32.8 dB.
- Differential inputs: Minimizes common-mode noise.
- Operating modes: Standby, mute, and play modes with low current consumption in standby.
- Protection features: Includes short-circuit protection, thermal overload protection, and overcurrent protection.
- ECOPACK® package: Environmentally friendly packaging.
Applications
The TDA7492ETR is primarily designed for home audio applications, including but not limited to:
- Home theaters and sound systems.
- Active speakers and subwoofers.
- Audio amplifiers for various consumer electronics.
Q & A
- What is the operating voltage range of the TDA7492ETR?
The TDA7492ETR operates within a voltage range of 7 to 26 volts.
- What are the possible output configurations of the TDA7492ETR?
The device supports 2 x PBTL (Pseudo Bridge-Tied Load) and 1 x Parallel BTL (Bridge-Tied Load) configurations.
- How many gain settings are available on the TDA7492ETR?
There are four selectable, fixed-gain settings: 20.8 dB, 26.8 dB, 30 dB, and 32.8 dB.
- What protection features does the TDA7492ETR include?
The device includes short-circuit protection, thermal overload protection, and overcurrent protection.
- How is the gain setting controlled on the TDA7492ETR?
The gain is set by the voltage on the GAIN pin, which can be configured using external resistor dividers or direct connections to VDDS or SGND.
- What are the operating modes of the TDA7492ETR?
The device has three operating modes: standby, mute, and play, controlled by the STBY and MUTE pins.
- How does the overcurrent protection work on the TDA7492ETR?
If the overcurrent protection threshold is reached, the power stage is shut down immediately and recovers automatically when the fault is removed.
- What is the thermal shutdown temperature of the TDA7492ETR?
The device shuts down the power stage when the internal die temperature exceeds 150°C and recovers when the temperature drops below the threshold.
- How is the power limit function implemented on the TDA7492ETR?
The power limit is set through the voltage at the PLIMIT pin, which limits the output voltage level by adjusting the duty cycle.
- What is the switching frequency of the TDA7492ETR?
The switching frequency is approximately 500 kHz with an external Rosc of 33 kΩ.
