25W single chip audio class D power amplifier IC-TDA7482

Regarding the pulse width modulated Class D audio power amplifier, foreign magazines have
continuously discussed and reported it in the past half century. The main attractive feature of this technology is its
high output efficiency (generally over 85-90%), which is more important for amplifiers with larger output power. However, its distortion index
is still far from high Hi-Fi requirements. It is now known that the THD of Class D PWM power amplifiers is about 0.1 ~ 0.oi%, but
when the power is greater than 50w, it is difficult to reach this range of indicators. Although the audio power amplifier made by PWM is not very musical, it does not feel very musical. Secondly
, the powerful PWM carrier frequency will inevitably cause serious electromagnetic interference in the medium and short wave bands. This is probably
a problem that existing filter designs cannot satisfactorily solve. However, it is still used in the sound output stage of large-screen color TVs, the audio part of multimedia computers and
In the car stereo system, the above shortcomings of the PWM power amplifier do not seem to be important, so it has found its use. Moreover, if an international company such as SGS-
THOMSON launches this type of series of chips in the form of a single chip, you can expect them to work very reliably
and are worth recommending.