Car amplifier 70 W. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Automotive power amplifiers
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The integrated amplifier TDA1562 was developed in 1998 by the concern "PHILIPS" and is a twice as powerful version of the TDA1560 (40 W). In the new amplifier, the developers have significantly improved the health of the output stage and simplified the circuit diagram even more.
A feature of the TDA1562 is that it operates in the H amplification mode, which is characterized by the fact that at the time of the passage of a powerful output signal pulse, the power of the final stage is thrown up by special storage circuits (4700 mF - 2 pcs).
Thus, a twofold increase in the output voltage and a fourfold increase in the output power are achieved compared to a conventional bridge amplifier (namely, these are the ones that are on almost all radio tape recorders). In addition, a very high efficiency is achieved - precisely thanks to the tracking power supply - in the rated power mode, the average current consumption of the TDA1562 barely reaches 1,5 ... 2 amperes. But this is on a real music signal. If you apply a test sinusoidal signal, then the current consumption will immediately increase to 6,5 amperes. In this case, the "tracking power" effect no longer works, that is, the storage circuits regularly raise the power supply to the final stages, but already in a constant mode, and not in a pulsed mode, as in a real music signal. But in the end, amplifiers are made to listen to music, not "sine". Here, listen to your health.
Specifications:
- Upp.(min/max)......+8...18 V
- Upit. optimal)......+12 V (+14,4 V)
- Icons.(Uin.=0)).......0,15...0,2 A
- Icons. medium) ...... 1,5 ... 2 A
- Icons. max) ...... up to 10 A
- Rout. nominal (RMS (sine)).......50 W (4 ohms); 30 W (8 ohm)
- Rout. maximum)......70 W (4 Ohm.) ; 40 W (8 Ohm.)
- fwork)......15...60000 Hz (+0 dB; -3dB)
- Uin)......-0,707 V
- Kusil)......26 dB
- Kharm)......0,03%
- Ksignal/noise)......-90 dB
- Kdempf. (100 Hz; 4 Ohm)).......not less than 40
The amplifier has reliable output protection from K3, as well as thermal protection (just as reliable). Heat dissipation less than - 400 cm2.
Subwoofer amplifier is the most suitable job for TDA1562.
Childish simplicity of the circuit, high reliability and sufficient power - what else does an amplifier need to make a worthy pair for a subwoofer? Nothing but the right crossover. For subwoofer amplifiers, we make special crossovers, which have: an input adder, a low-pass filter, a subsonic filter, smooth phase adjustment.
See other articles Section Automotive power amplifiers.
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