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參數(shù)資料
| 型號： | TDA7381 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 18 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| 封裝： | FLEXIWATT-25 |
| 文件頁數(shù)： | 13/13頁 |
| 文件大?。?/td> | 225K |
| 代理商： | TDA7381 |
TDA7381
Application hints
9/13
Figure 8.
Clipping detection waveforms.
In other words, this feature offers the means to counteract the extremely sound-damaging
effects of clipping, caused by a sudden increase of odd order harmonics and appearance of
serious intermodulation phenomena. Another possible kind of distortion control could be the
setting of a maximum allowable THD limit (e.g. 0.5%) over the entire audio frequency range.
Besides offering no practical advantages, this procedure cannot be much accurate, as the
non-clipping distortion is likely to vary over frequency.
In case of overheating, pin 25 will signal out the junction temperature proximity to the
thermal shut-down threshold. This will typically start about 2°C before the thermal shut-
down threshold is reached.
As various kind of diagnostics information is available at pin 25 (clipping, shorts and
overheating), it may be necessary to operate some distinctions on order to treat each event
separately.
This could be achieved by taking into account the intrinsically different timing of the
diagnostics output under each circumstance. In fact, clipping will produce pulses normally
much shorter than those present under faulty conditions.
An example of circuit able to distinguish between the two occurrences is shown by
Figure 9.
Diagnostics waveforms
t
MUTE PIN
VOLTAGE
Vs
OUTPUT
WAVEFORM
Vpin 25
WAVEFORM
SHORT TO GND
OR TO Vs
D95AU304
CLIPPING
THERMAL
PROXIMITY
ST-BY PIN
VOLTAGE
t
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相關(guān)代理商/技術(shù)參數(shù) |
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| TDA7381_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 x 25W quad bridge car radio amplifier |
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| TDA7382音頻功率放大器 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| TDA7383 | 功能描述:音頻放大器 4X30W Quad Brdg Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7384 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 x 35W QUAD BRIDGE CAR RADIO AMPLIFIER |
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