Car stereo amplifier on TDA1562Q. Scheme, description

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Car stereo amplifier based on the TDA1562Q chip. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Automotive power amplifiers

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I think every audio enthusiast who has to go by car wants to have good sound not only at home but also in his car. Unfortunately, high-quality car audio is not as cheap as we would like. Even if the car already has an audio system, I think every music lover will want to add a subwoofer to it.

I turned out to be such a music lover. I didn’t have money for a high-quality amplifier from leading car audio companies such as Magnat, JBL, Focal, Alpine, which costs XXX (and it’s not my own car, but my father’s), so it was decided to quickly make an inexpensive amplifier for a subwoofer in a car . Without thinking for a long time, the TDA1562Q chip was chosen, which operates on a 12V unipolar power supply and, according to the manufacturer, is capable of delivering 70W of power (actually somewhere around 40). 2 chips were purchased because I decided to make a stereo amplifier. The switching circuit is shown in the figure. I drew it myself, so if there are mistakes, forgive me.

(click to enlarge)

There is nothing special in the scheme. It was taken from one of the articles on this site. And yet there is one stupidity in the circuit, I threw out the "soft start", but it can be easily entered, this is provided on the printed circuit board. Each of the amplifier channels is assembled on a separate board. The photo shows one of them.

You can take it in Sprint Layout 4.0 format here.

Detail side markings. It may not be the best markup, but it works 100%. All tracks need to be made thicker, especially the food tracks, since my signet is not yet fully finished.

Car stereo amplifier on a TDA1562Q chip

The microcircuits are mounted on radiators with a rather small dissipation area, which is justified by the use of a small cooler. (In practice, this turned out to be enough). The body of the amplifier is made from MDF with a thickness of about 7 mm. The top cover was made removable. The hull is covered with sheathing materials of two types. Here is a view of the amplifier without the top cover.

Car stereo amplifier on a TDA1562Q chip

The cooler is located on the front panel, there is also a power switch, volume control, power and H mode indicators. Here is a general view of the amplifier from the front:

Car stereo amplifier on a TDA1562Q chip

On the rear panel there is a cooler switch, power and speaker output terminals, as well as line input sockets. Also on the back panel there is a small hole for good air circulation inside the case. The rear view of the amplifier is shown in the photo.

Car stereo amplifier based on the TDA1562Q chip. Amplifier photo

I can’t say anything special about the sound of the amplifier, the most common microchip sound. Not particularly good, but not that bad either. By connecting the amplifier to the linear output to the subwoofer in the radio and loading the subwoofer with 75GDN, I really heard low frequencies in the car. But still not what I wanted, I added another sub to the second channel. Oh, even a good sound pressure has already appeared here, of course, it’s not possible to compete in SPL competitions, but for an initial car audio it may well go. And the price is far from XXX. So I recommend making a subwoofer on two dynos (at least 35GDN) and include each one in your amplifier channel. Of course, the amplifier can be used not only for a subwoofer, but also for, for example, rear speakers. Believe me, he plays better than the regular amplifier of the car radio.

I wish you success! For questions, advice write.

Author: Alexander Korchinsky, Sashakorch [dog] mail.ru; Publication: cxem.net

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