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參數(shù)資料
| 型號(hào)： | TDA7370 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 6.5 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| 封裝： | MULTIWATT-15 |
| 文件頁(yè)數(shù)： | 2/17頁(yè) |
| 文件大?。?/td> | 7247K |
| 代理商： | TDA7370 |
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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 connection shown
in fig. 19 has then allowed the full exploitation of
its possibilities.
The clear advantages this new approach has over
classical output stages are as follows:
1 - Rail-to-Rail Output Voltage Swing With No
Need Of Bootstrap Capacitors.
The output swing is limited only by the Vcesat of
the output transistors, which are in the range of
0.6 Ohm (Rsat) each.
Classical solutions adopting composite 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 addition of expensive bootstrap capacitors.
2 - Absolute Stability Without Any External
Compensation.
Referring to the circuit of Fig. 19
the gain
VOUT/VIN is greater than unity, approximately 1 +
R2/R1. The DC output (VCC/2) is fixed by an aux-
iliary amplifier common to all the channels).
By controlling the amount of this local feedback it
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
intrinsically stable 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 Boucherot cells.
OTHER OUTSTANDING CHARACTERISTICS:
Clipping Detector Output
The TDA7370 is equipped with an internal circuit
able to detect the output stage saturation provid-
ing a current sinking into a open collector output
(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
obtaining high quality sound at all listening levels.
Figure 19: The new Output Stage
Figure 20: Clipping Detection Waveforms
TDA7370
10/17
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| TDA7375AH | 43 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| TDA7375AV | 43 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| TDA7375H | 12 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| TDA7375V | 40 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| TDA7376PDTR | 37 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7370B | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:QUAD POWER AMPLIFIER FOR CAR RADIO |
| 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 |
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