small high-power amplifier - at least 120 W into 4 Q

at least 120 W into 4 Q The TDA 2030, made by SGS Ates, is a complete amplifier contained in a single IC with a five-pin Pentawatt package. Its class AB output stage can provide a power of 14 W into 4 Q at a supply voltage of ±14 V. The amplifier has a built-in short- circuit and overload protection, and also a thermal shutdown. This means that it is not so easy to destroy the IC as long as the supply voltage is kept below the absolute maximum of +18 V. Combining two 2030s with a few in- expensive power transistors can form an amplifier that can drive quite a lot of power into a load of 2 to 4 Q. As the diagram shows, the circuit is a standard "bridge" amplifier so there is little to be said about it. Each half of the bridge consists of a TDA 2030 driving two complementary power transistors. The diodes, D1 . . . D4, are needed to protect the transistors from the loudspeaker coil"s inductive 7-40 ju ly /august 1984 R30 AlU 71.n5 T1,T3 = BD 250, TIP 36 T2,T4 = BD 249, TIP 35 IC1,...