TDA7296 + NE5532 Making computer speaker power amplifier ----- TDA7296 Power Amplifier

TDA7296 + NE5532 Making computer speaker power amplifier, TDA7296 Power Amplifier Keywords: TDA7296 + NE5532 Making computer speaker power amplifier An example of an audio system design Use MP3 to send music and get more and more love. The author recently purchased a new computer, I want to use this as a family study and music center. I have listened to several active speakers. The effect was not satisfied, and I generated my own computer-specific audio system. Expedition before the Spring Festival, it is good, and the effect is as follows. First, design concept The author's main listening room is about 20 square meters. In this highly intensive large number of residents, considering the impact of the sound on the surrounding environment, I believe that the megaphone of the output power is 20W ~ 30W (RMS) can meet the needs of household amplus. Some people think that the sound should have sufficient power reserves, and the power of the home extension machine is 50W (RMS) or more, and the author thinks there is nothing, because this increases the production cost, but also increases Energy power consumption (especially the amplifier). Therefore, the output power of the household megaphone is set at 20W ~ 30W (RMS) is the "green" set of "green", a "green" set. two. Circuit design Considering the music of the soft tone in the family listening environment, the power amplifier part chooses the integrated circuit TDA7296 with sweet tone, and its technical parameters are as follows: Power voltage VS: ± 10V ~ ± 35V Output peak current: 5A Output power PO: When Vs = ± 18V, RL = 4Ω, PO = 30W, in VS = ± 24V, RL = 8Ω B, PO = 30W. Input sensitivity: 750my Frequency range: 20Hz ~ 20kHz The ambiguous portion circuit diagram is shown in Figure 1, and the power supply portion is shown in Figure 2. This circuit uses traditional circuitry juice to select a good quality component, and the transformer selects 100VA / 14V × 2 ring transformer. Third, the design of the speaker Speaker is shown in Figure 3, the bass unit is selected from the South Whale 8 inch 210-8A aluminum frame imports Sub-pressure wool whale package qc20-805 silk 89 treble horn, divider selection finished products Division. The wooden board is created with a thickness plate in thickness of 15mm, and some of the corners of the box put some suction pads. Although the computer spoken system is not large, it is used to appreciate the various MP3 music, and there is a classical music. It is also a popular music. The treble is intimate, the bass is very powerful, the sense of listening is very good, it is testimulated " Not at high. There is a truth of Xian Spirit.

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