Single-Chip 40 W Amplifier

EE JULY/AUGUST 1987 To answer the need for a com- pact amplifier that is capable of satisfactory operation when driven from a compact disc player, Philips have developed the Type TDA1514 AF amplifier chip, which is remarkable for its excellent specifications, rug- gedness and output power. The device is housed in a 9-pin SIL POWER enclosure which has a thermal resistance of less than 1.5 K/W, so that the heatsink required must have a thermal resistance of no more than 3.8 K/W if the chip is operated at its maximum dissipation of 19 W (Ub= +27.5 V, T.= 50 °C). The circuit diagram shows that very few components are needed to make this high- performance amplifier. The power supply to feed the chip must be capable of delivering a current of at least 3 A; the quiescent current demand of the amplifier as shown is about 60 mA. The supply voltage should not exceed +27.5 V. Although this project is not sup- ported by a ready-made printed circuit board, you should not experience too much d...