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参数资料
| 型号： | TDA7370BV |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 6.5 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| 封装： | MULTIWATT V-15 |
| 文件页数： | 2/18页 |
| 文件大小： | 7242K |
| 代理商： | TDA7370BV |
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 TDA7370B is equipped with an internal cir-
cuit able to detect the output stage saturation pro-
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
obtaining high quality sound at all listening levels.
Figure 19: The new Output Stage
Figure 20: Clipping Detection Waveforms
TDA7370B
10/17
相关PDF资料 |
PDF描述 |
|---|---|
| TDA7370B | 6.5 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| TDA7370 | 6.5 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| TDA7375AH | 43 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| TDA7375AV | 43 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| TDA7375H | 12 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA7370V | 制造商:STMicroelectronics 功能描述:QUAD 6.5W AMP. - Rail/Tube |
| TDA7372A | 功能描述:音频放大器 4X6W Power Amplifier RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TDA7372B | 功能描述:音频放大器 4X6W Power Amplifier RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TDA7374 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Dual bridge audio amplifier for car radio |
| TDA7374_08 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Dual bridge audio amplifier for car radio |
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