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參數(shù)資料
| 型號(hào)： | TDA2040V |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 22 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM5 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 1343K |
| 代理商： | TDA2040V |
TDA2040
Applications
Doc ID 1460 Rev 4
11/16
3.2
Multiway speaker systems and active boxes
Multiway loudspeaker systems provide the best possible acoustic performance since each
loudspeaker is specially designed and optimized to handle a limited range of frequencies.
Commonly, these loudspeaker systems divide the audio spectrum into two, three or four
bands.
To maintain a flat frequency response over the hi-fi audio range the bands covered by each
loudspeaker must overlap slightly. Any imbalance between the loudspeakers produces
unacceptable results, therefore, it is important to ensure that each unit generates the correct
amount of acoustic energy for its segment of the audio spectrum. In this respect it is also
important to know the energy distribution of the music spectrum (see Figure 22) in order to
determine the cut-off frequencies of the crossover filters. As an example, a 100-W three-way
system with crossover frequencies of 400 Hz and 3 kHz would require 50 W for the woofer,
35 W for the midrange unit and 15 W for the tweeter.
Both active and passive filters can be used for crossovers but today active filters cost
significantly less than a good passive filter using air-cored inductors and non-electrolytic
capacitors. In addition, active filters do not suffer from the typical defects of passive filters:
power loss
increased impedance seen by the loudspeaker (lower damping)
difficulty of precise design due to variable loudspeaker impedance
Obviously, active crossovers can only be used if a power amplifier is provided for each drive
unit. This makes it particularly interesting and economically sound to use monolithic power
amplifiers.
In some applications, complex filters are not really necessary and simple RC low-pass and
high-pass networks (6 dB/octave) can be recommended. The results obtained are excellent
because this is the best type of audio filter and the only one free from phase and transient
distortion. The rather poor out of band attenuation of single RC filters means that the
loudspeaker must operate linearly well beyond the crossover frequency to avoid distortion.
Figure 21.
Frequency response
Figure 22.
Power distribution vs frequency
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA2040V | 制造商:STMicroelectronics 功能描述:AUDIO AMP 22W 2040 PENTAWATT-5 |
| TDA2048 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Multistandard quasi parallel-sound processor for Mono-TV-Sets |
| TDA2049 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:新出D類功放IC:（2X15W）主要應(yīng)用于移動(dòng)電瓶音響，蘋果音響，電腦音響，電視，等影音產(chǎn)品上面；歡迎索取樣品：電話13410383262許生 |
| TDA2050 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:32W HI-FI AUDIO POWER AMPLIFIER |
| TDA2050_11 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:32 W hi-fi audio power amplifier |
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