The TDA7491HV is a dual BTL class-D audio amplifier with single power supply designed for LCD TVs and monitors. It features a high efficiency of 90% and supports four selectable, fixed gain settings. It also has short-circuit protection, thermal overload protection and external synchronization.
The TDA7491HV is a dual bridge-tied load (BTL) class-D audio amplifier featuring single-supply operation ranging from 5 V to 18 V. It delivers continuous output power of 20 W per channel into an 8 Ω load with less than 10% total harmonic distortion at 18 V supply voltage.
The device is designed for high efficiency, achieving up to 90%, which eliminates the need for a separate heatsink when using the exposed-pad-down PowerSSO-36 package. It includes features such as four selectable fixed gain settings (20 dB, 26 dB, 30 dB, and 32 dB), standby and mute functions, and protection against short circuits and thermal overload.
| Continuous output power (8 Ω, 10% THD) | 20 W + 20 W |
|---|---|
| Supply voltage range | 5 V - 18 V |
| Efficiency | 90% |
| Operating temperature range | -40 to +85°C |
| Package type | PowerSSO-36 EPD |
No, thanks to its high efficiency and exposed-pad-down package, no separate heatsink is required.
The device offers four fixed gain settings of nominally 20 dB, 26 dB, 30 dB and 32 dB.
Yes, it is pin-to-pin compatible with the TDA7491P and TDA7491LP.