Simple and easy TDA2003 amplifier circuit ----- TDA2003 Power Amplifier

Author: Shenjun This circuit is simple because the circuit is selected from the selection of TDA2003 integrated blocks, and the channel is wide, the sound quality is beautiful, and the sound quality can be widely used in each audio and voice amplifier circuit. The integrated OTL power amplifier circuit is shown below. The integrated block (1) pin is the input, (2) foot external capacitor C2 constitutes an alternating negative feedback for improving the sound quality of the amplifier, C3, R1 is anti-self-excited network, C4 is output coupling capacitance, C6, C7 is a high power supply, a low pass filter capacitor, a power supply voltage Vcc is 14.4 V, a quiescent current is 45mA, and the value of the load RL is 4Ω, and the power is 6W. Installation Precautions (1) To properly determine the order of each pin of TDA2003, no welding errors are allowed. When welding electrolytic capacitors C1, C2, C4, C6 must pay attention to the positive and negative polarity of the capacitor cannot be reversed. (2) The voltage of the power supply VCC cannot be too high, and it is not too low, about 14.4V is appropriate. (3) After the welding is completed, the audio output jack of the radio or recorder can be connected to the input 1 pin in the figure. (4) To install a heat sink on the set block TDA2003, the working time is too long to be damaged. Component selection of components of TDA20031, 1Ω, 2.2Ω, 39Ω, 220Ω resistor each; 1, 1,470μF, 1000μF, 100μF, 470μF, 1000 μF capacitance each, 2 0.1 μF capacitance; 8Ω, 0.25W1, 14.4V power supply.

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