[Photo] TDA1514A × 2 amplifier production


TDA1514A integrated circuit power IC, rated output power is 40W, the practical circuit is shown in Figure 1. After listening to the installation according to the circuit diagram, the sound is very clear and pleasant. But there is a partial "cold" feeling. As a result, the pre-amplifier integrated circuit was replaced with the "warm" tone dual-amp AD712, making the tone tend to be "neutral".
TDA1514A is a single-row nine-pin package. â‘¡ The pin is connected to the internal protection circuit. When the load is overloaded, the mute circuit is turned on to prevent the audio signal from flowing through the internal amplification circuit of the power block, thereby protecting the integrated block from being burned by overcurrent. The mute circuit consists of the charging and discharging circuit of RA and CA and the internal circuit of the foot.
It should be noted that the heat sink of the integrated block is connected to the negative power supply â‘£ pin, so the mica sheet should be filled and insulated from the radiator during assembly.

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[Photo] Hi-Fi dubbing control amplifier production
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