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General description

The TDA7901 is a 4-bridge channel amplifier featuring a powerful integrated digital to analog converter, ensuring

high audio quality and immunity from any input disturbances. Moreover, it combines the advantages of the

Class-G solution to the improved high efficiency (SB-I) already embedded in the TDA780x running family.

Class-G works based on an integrated buck controller that automatically adjusts the voltage rail depending on

the audio signal level thus optimizing efficiency at each output level. Thanks to this innovative combination of

features, the TDA7901 is nearly as efficient as a Class-D amplifier when providing the normal listening level

of audio power (1 W).

In addition, by integrating full in-play diagnostics as well as a digital impedance meter and real-time load-current

monitor the TDA7901 is aligned with the most advanced audio amplifiers and with the most demanding OEM

requirements.

Finally, TDA7901 complies with the highest audio quality standards, such as exceptionally low noise (< 20 μV),

very high Dynamic Range (117 dB), and support HD (high definition) audio as well with a frequency response flat

until 80 kHz.

TDA7901 works over a 4.5-18 V operating range on 4 Ω loads and it is housed in a compact PowerSO36 that

helps to reduce the overall system space occupation and cost.

Thanks to the above mentioned features and also considering the better EMC performances, the TDA7901

can offer a wide range of advantages compared to a class D application, including the reduced system space

occupation for mid-power operation.

TDA7901

General description

DB4653 - Rev 1

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