Philips have developed the Type TDA1514 AF amplifier chip, which is remarkable for its l excellent specifications, ruggedness and output power.
The circuit diagram shows that very few components are . needed to make this high- performance amplifier.
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/Wif the chip is operated at its maximum dissipation of l9 W (Ub= i-27.5 L Ta=5O °C).
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.
Make sure, however, that the tracks and connections to the Sl i supply and output terminals are as short as possible, and use H double tracks where this is I necessary. In this context, it is advisable to fit decoupling 5 capacitors C3 and Ca as close as 3 possible to the chip supply pins. Resistors R2 and R3.
The supply voltage 1 should not exceed +/-27.5v. Although this project is not supported by a ready—made printed circuit board, you should not C experience too much difficulty in constructing the amplifier if it F $ is built on a piece of Veroboard.
Courtesy: Elektor Electronics
The circuit diagram shows that very few components are . needed to make this high- performance amplifier.
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/Wif the chip is operated at its maximum dissipation of l9 W (Ub= i-27.5 L Ta=5O °C).
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.
Make sure, however, that the tracks and connections to the Sl i supply and output terminals are as short as possible, and use H double tracks where this is I necessary. In this context, it is advisable to fit decoupling 5 capacitors C3 and Ca as close as 3 possible to the chip supply pins. Resistors R2 and R3.
The supply voltage 1 should not exceed +/-27.5v. Although this project is not supported by a ready—made printed circuit board, you should not C experience too much difficulty in constructing the amplifier if it F $ is built on a piece of Veroboard.
Courtesy: Elektor Electronics
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