Overview
The TDA7491LP is a dual BTL class-D audio amplifier designed by STMicroelectronics, specifically for use in LCD TVs and monitors. This amplifier operates with a single power supply and is known for its high efficiency, which eliminates the need for a separate heatsink due to its exposed-pad-down (EPD) package. The filterless operation of the TDA7491LP reduces the external component count, making it a compact and efficient solution for audio amplification needs.
Key Specifications
| Parameter | Value |
|---|---|
| Continuous Output Power (R = 8 Ω, THD = 10% at VCC = 9 V) | 5 W + 5 W |
| Continuous Output Power (R = 4 Ω, THD = 10% at VCC = 6.6 V) | 5 W + 5 W |
| Single Supply Operation Range | 5 V - 14 V |
| Efficiency | 90% |
| Gain Settings | 20 dB, 26 dB, 30 dB, 32 dB |
| Package Type | PowerSSO 36 with exposed pad down |
| Operating Temperature Range | -40°C to 85°C |
Key Features
- High efficiency (η = 90%) reducing the need for a separate heatsink
- Filterless operation to minimize external component count
- No ‘pop’ at turn-on/off
- Standby and mute features
- Short-circuit protection and thermal overload protection
- Externally synchronizable
- Differential inputs to minimize common-mode noise
- Four selectable, fixed gain settings
Applications
The TDA7491LP is primarily designed for use in LCD TVs and monitors. Its high efficiency, compact design, and robust protection features make it an ideal choice for various audio amplification needs in consumer electronics and industrial applications.
Q & A
- What is the TDA7491LP used for?
The TDA7491LP is used as a dual BTL class-D audio amplifier in LCD TVs and monitors.
- What is the continuous output power of the TDA7491LP?
The continuous output power is 5 W + 5 W at R = 8 Ω, THD = 10% at VCC = 9 V, and 5 W + 5 W at R = 4 Ω, THD = 10% at VCC = 6.6 V.
- What is the operating voltage range of the TDA7491LP?
The operating voltage range is 5 V to 14 V.
- Does the TDA7491LP require a separate heatsink?
No, due to its high efficiency and exposed-pad-down package, no separate heatsink is required.
- What are the gain settings available on the TDA7491LP?
The gain settings are nominally 20 dB, 26 dB, 30 dB, and 32 dB.
- Does the TDA7491LP have protection features?
- Is the TDA7491LP externally synchronizable?
- What package type does the TDA7491LP come in?
- What is the operating temperature range of the TDA7491LP?
- Does the TDA7491LP produce ‘pop’ at turn-on/off?
