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| 型號： | TPA3107D2_07 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 15-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
| 中文描述： | 15 W立體聲D類音頻功率放大器 |
| 文件頁數(shù)： | 14/36頁 |
| 文件大小： | 510K |
| 代理商： | TPA3107D2_07 |
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CLASS-D OPERATION
This section focuses on the class-D operation of the TPA3107D2.
Traditional Class-D Modulation Scheme
The traditional class-D modulation scheme, which is used in the TPA032D0x family, has a differential output
where each output is 180 degrees out-of-phase and changes from ground to the supply voltage, V
CC
. Therefore,
the differential prefiltered output varies between positive and negative V
CC
, where filtered 50% duty cycle yields
0 V across the load. The traditional class-D modulation scheme with voltage and current waveforms is shown in
Figure 20
. Note that even at an average of 0 V across the load (50% duty cycle), the current to the load is high,
causing high loss and thus causing a high supply current.
0 V
-12 V
+12 V
Current
OUTP
Differential Voltage
Across Load
OUTN
TPA3107D2 Modulation Scheme
The TPA3107D2 uses a modulation scheme that still has each output switching from 0 to the supply voltage.
However, OUTP and OUTN are now in phase with each other with no input. The duty cycle of OUTP is greater
than 50% and OUTN is less than 50% for positive output voltages. The duty cycle of OUTP is less than 50%
and OUTN is greater than 50% for negative output voltages. The voltage across the load sits at 0 V throughout
most of the switching period, greatly reducing the switching current, which reduces any I
2
R losses in the load.
TPA3107D2
SLOS509A–OCTOBER 2006–REVISED NOVEMBER 2006
APPLICATION INFORMATION (continued)
Figure 20. Traditional Class-D Modulation Scheme's Output Voltage and Current Waveforms into an
Inductive Load With No Input
14
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPA3107D2EVM | 功能描述:音頻 IC 開發(fā)工具 AUD POWER AMP RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TPA3107D2PAP | 功能描述:音頻放大器 15W Stereo Class-D Aud Power 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA3107D2PAPG4 | 功能描述:音頻放大器 15W Stereo Class-D Aud Power 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA3107D2PAPR | 功能描述:音頻放大器 15W Stereo Class-D Audio Power 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA3107D2PAPRG4 | 功能描述:音頻放大器 15W Stereo Class-D Audio Power 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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