Overview
The TDA7492, specifically the TDA749213TR, is a dual BTL class-D audio amplifier designed by STMicroelectronics. This amplifier is optimized for use in LCD TVs and monitors, leveraging its high efficiency and exposed-pad-up (EPU) package to minimize the need for complex heatsinking. The device operates on a single power supply and is known for its robust performance and environmental friendliness due to its ECOPACK® packaging.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit | |
|---|---|---|---|---|---|---|
| VCC | Supply voltage for pins PVCCA, PVCCB, SVCC | - | 8 | 26 | V | |
| Iq | Total quiescent current | - | 26 | 35 | mA | |
| IqSTBY | Quiescent current in standby | - | - | 2.5 | 5.0 | μA |
| Output Power (THD = 10%) | RL = 6 Ω, VCC = 25 V | - | 50 | - | W | |
| Output Power (THD = 10%) | RL = 8 Ω, VCC = 25 V | - | 40 | - | W | |
| Efficiency (η) | Po = 40 W + 40 W | 80 | 90 | - | % | |
| THD | Po = 1 W | 0.1 | 0.4 | - | % | |
| GV | Closed-loop gain | 20.6 | 21.6 | 22.6 | dB | |
| Operating Temperature | - | -40 | - | 85 | °C |
Key Features
- 50 W + 50 W continuous output power at THD = 10% with RL = 6 Ω and VCC = 25 V
- 40 W + 40 W continuous output power at THD = 10% with RL = 8 Ω and VCC = 25 V
- Wide-range single-supply operation (8 - 26 V)
- High efficiency (η = 90%)
- Four selectable, fixed gain settings of nominally 21.6 dB, 27.6 dB, 31.1 dB, and 33.6 dB
- Differential inputs minimize common-mode noise
- Standby and mute features
- Short-circuit protection
- Thermal overload protection
- Externally synchronizable
- ECOPACK®, environmentally friendly package
Applications
The TDA7492 is primarily designed for use in LCD TVs and monitors, where its high efficiency, compact packaging, and robust audio performance are particularly beneficial. It can also be used in other audio applications requiring high power output and low distortion.
Q & A
- What is the maximum output power of the TDA7492 at THD = 10% with a 6 Ω load?
The maximum output power is 50 W per channel at THD = 10% with a 6 Ω load and VCC = 25 V.
- What is the operating temperature range of the TDA7492?
The operating temperature range is -40°C to +85°C.
- What is the efficiency of the TDA7492?
The efficiency of the TDA7492 is up to 90%.
- Does the TDA7492 have built-in protection features?
- Can the gain of the TDA7492 be adjusted?
- What type of package does the TDA7492 use?
The TDA7492 uses a PowerSSO-36 EPU package with an exposed pad for heatsinking.
- Is the TDA7492 environmentally friendly?
- Can the TDA7492 be synchronized externally?
- What is the typical quiescent current of the TDA7492 in standby mode?
The typical quiescent current in standby mode is 2.5 μA.
- What is the total harmonic distortion (THD) of the TDA7492 at 1 W output power?
The THD at 1 W output power is typically 0.1% to 0.4%.
