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參數(shù)資料
| 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)： | 17/36頁 |
| 文件大?。?/td> | 510K |
| 代理商： | TPA3107D2_07 |
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Adaptive Dynamic Range Control
TPA3107D2
t - Time = 100 s/div
V
Closest Competitor
Closest Competitor
t - Time = 20 s/div
V
TPA3107D2
Gain setting via GAIN0 and GAIN1 inputs
The gain of the TPA3107D2 is set by two input terminals, GAIN0 and GAIN1.
INPUT RESISTANCE
Changing the gain setting can vary the input resistance of the amplifier from its smallest value, 16 k
±
20%, to
the largest value, 32 k
±
20%. As a result, if a single capacitor is used in the input high-pass filter, the -3 dB or
cutoff frequency may change when changing gain steps.
TPA3107D2
SLOS509A–OCTOBER 2006–REVISED NOVEMBER 2006
APPLICATION INFORMATION (continued)
Figure 25. 1-kHz Sine Output at 10% THD+N
Figure 26. 8-kHz Sine Output at 10% THD+N
The Texas Instruments patent-pending adaptive dynamic range control (ADRC) technology removes the notch
inherent in class-D audio power amplifiers when they come out of clipping. This effect is more severe at higher
frequencies as shown in
Figure 26
.
The gains listed in
Table 1
are realized by changing the taps on the input resistors and feedback resistors inside
the amplifier. This causes the input impedance (Z
I
) to be dependent on the gain setting. The actual gain settings
are controlled by ratios of resistors, so the gain variation from part-to-part is small. However, the input
impedance from part-to-part at the same gain may shift by
±
20% due to shifts in the actual resistance of the
input resistors.
For design purposes, the input network (discussed in the next section) should be designed assuming an input
impedance of 12.8 k
, which is the absolute minimum input impedance of the TPA3107D2. At the lower gain
settings, the input impedance could increase as high as 38.4 k
Table 1. Gain Setting
INPUT IMPEDANCE
(k
)
TYP
32
16
16
16
AMPLIFIER GAIN (dB)
GAIN1
GAIN0
TYP
20
26
32
36
0
0
1
1
0
1
0
1
17
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相關(guān)代理商/技術(shù)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(fēng)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(fēng)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(fēng)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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