TDA2030 Audio Power Amplifier

TDA2030 is an audio amplifier circuit produced by Telefunken, which adopts a V-shaped 5-pin single-in-line plastic package structure. As shown in Figure 1, the pins can be divided into H-type and V-type according to the shape of the pins. This integrated circuit is widely used in car stereo recorders and medium-power audio equipment. It has the characteristics of small size, high output power, and low distortion. It also has an internal protection circuit. SGS of Italy, RCA of the United States, Hitachi of Japan, NEC of Japan, etc. all produce similar products. Although their internal circuits are slightly different, the pin positions and functions are the same and can be interchanged.

 Circuit features:

    [1]. Very few external components.

[2]. High output power, Po=18W (RL=4Ω).

    [3]. Ultra-small package (TO-220) is used to increase assembly density.

    [4]. Minimal power-on impact.
[5]. Contains various protection circuits, so it works safely and reliably. The main protection circuits include: short circuit protection, thermal protection, accidental ground open circuit, reverse polarity of power supply (Vsmax=12V), and load discharge voltage rebound, etc.

TDA2030 has a load discharge voltage kickback protection circuit. If the peak voltage of the power supply voltage is 40V, an LC filter must be inserted between pin 5 and the power supply to ensure that the pulse train on pin 5 is maintained within the specified amplitude.

    Thermal protection: Thermal protection has the following advantages. It can easily withstand output overload (even for a long time) or protect when the ambient temperature exceeds the limit.

    Compared with ordinary circuits, the heat sink can have a smaller safety factor. In the event that the junction temperature exceeds the limit, it will not damage the device. If this happens, Po= (of course, Ptot) and Io are reduced.

    When designing the printed circuit board, the decoupling of the ground wire and the output must be well considered because these lines have large currents passing through them.

    During assembly, the heat sink does not need to be insulated, the lead length should be as short as possible, and the soldering temperature must not exceed 260°C for 12 seconds.

    Although TDA2030 requires very few components, the selected components must be of guaranteed quality.

Note:     TDA2030 has a load discharge voltage kickback protection circuit. If the peak voltage of the power supply voltage is 40V, an LC filter must be inserted between pin 5 and the power supply to ensure that the pulse train on pin 5 is maintained within the specified amplitude.     Thermal protection: Thermal protection has the following advantages. It can easily withstand output overload (even for a long time) or protect when the ambient temperature exceeds the limit.     Compared with ordinary circuits, the heat sink can have a smaller safety factor. In the event that the junction temperature exceeds the limit, it will not damage the device. If this happens, Po= (of course, Ptot) and Io are reduced.     When designing the printed circuit board, the decoupling of the ground wire and the output must be well considered because these lines have large currents passing through them.     During assembly, the heat sink does not need to be insulated, the lead length should be as short as possible, and the soldering temperature must not exceed 260°C for 12 seconds.     Although TDA2030 requires very few components, the selected components must be of guaranteed quality.