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參數(shù)資料
| 型號： | TDA7370B |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Quad Power Amplifier for Car Radio(用于汽車收音機(jī)的四功率放大器) |
| 中文描述： | 四功率放大器汽車收音機(jī)（用于汽車收音機(jī)的四功率放大器） |
| 文件頁數(shù)： | 10/17頁 |
| 文件大?。?/td> | 258K |
| 代理商： | TDA7370B |
OUTPUT STAGE
The fully complementary output stage was made
possible by the development of a new compo-
nent: the ST exclusive power ICV PNP.
A novel design based upon the connectionshown
in fig. 19 has then allowed the full exploitation of
its possibilities.
The clear advantages thisnew approachhas over
classical output stagesare as follows:
1 - Rail-to-Rail Output Voltage Swing With No
NeedOf Bootstrap Capacitors.
The output swing is limited only by the Vcesat of
the output transistors, which are in the range of
0.6 Ohm(R
sat
) each.
Classical solutions adoptingcomposite PNP-NPN
for the upper output stage have higher saturation
loss on the top side of the waveform. This unbal-
anced saturation causes a significant power re-
duction. The only way to recover power consists
of the additionof expensivebootstrap capacitors.
2 - Absolute Stability Without Any External
Compensation.
Referring to the circuit of Fig. 19
V
OUT
/V
IN
is greater than unity, approximately 1 +
R2/R1. The DC output (V
CC
/2) is fixed by an aux-
iliary amplifier common to all the channels).
By controlling the amount of this local feedbackit
is possible to force the loop gain (A *
β
) to less
than unity at frequency for which the phase shift
is 180 Deg. This means that the output buffer is
intrinsicallystable and not prone to oscillation.
Most remarkably, the above feature has been
achieved in spite of the very low closed loop gain
of the amplifier (20 dB).
In contrast, with the classical PNP-NPN stage,
the solution adopted for reducing the gain at high
frequencies makes use of external RC networks,
namely the Boucherotcells.
the gain
OTHER OUTSTANDING CHARACTERISTICS:
Clipping Detector Output
The TDA7370B is equipped with an internal cir-
cuitable to detectthe output stage saturationpro-
viding a current sinking into a open collector out-
put (pin 10) when a certain distortion level is
reached at each output.
This particular function allows gain compression
facility whenever the amplifier is overdriven, thus
obtaininghigh quality sound at all listeninglevels.
Figure19:
The new OutputStage
Figure20:
Clipping DetectionWaveforms
TDA7370B
10/17
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA7370 | QUAD POWER AMPLIFIER FOR CAR RADIO |
| TDA7372A | Power Amplifier for Car Radio(用于汽車收音機(jī)的4×6W功率放大器) |
| TDA7372B | 4 x 6W Power Amplifier for Car Radio(4×6W用于汽車收音機(jī)的功率放大器) |
| TDA7374B | Dual Bridge Audio Amplifier for Car Radio(用于車載電臺的雙通道橋式音頻放大器) |
| TDA7374 | DUAL BRIDGE AUDIO AMPLIFIER FOR CAR RADIO |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7370BV | 功能描述:音頻放大器 18V Op 28V DC 36W 50V Supply 4.5A Out 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 |
| TDA7370V | 制造商:STMicroelectronics 功能描述:QUAD 6.5W AMP. - Rail/Tube |
| TDA7372A | 功能描述:音頻放大器 4X6W Power Amplifier 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 |
| TDA7372B | 功能描述:音頻放大器 4X6W Power Amplifier 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 |
| TDA7374 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Dual bridge audio amplifier for car radio |
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