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| 型号： | TPA3101D2PHPR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48 |
| 封装： | 7 X 7 MM, GREEN, PLASTIC, HTQFP-48 |
| 文件页数： | 14/41页 |
| 文件大小： | 1073K |
| 代理商： | TPA3101D2PHPR |
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TPA3101D2
ClosestCompetitor
t-Time=100 s/div
m
V-V
oltage=10V/div
TPA3101D2
ClosestCompetitor
t-Time=20 s/div
m
V-V
oltage=1V/div
www.ti.com
SLOS473C – DECEMBER 2005 – REVISED SEPTEMBER 2007
Adaptive Dynamic Range Control
Figure 31. 1-kHz Sine Output at 10% THD+N
Figure 32. 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 32.
Gain setting via GAIN0 and GAIN1 inputs
The gain of the TPA3101D2 is set by two input terminals, GAIN0 and GAIN1.
The gains listed in Table 2 are realized by changing the taps on the input resistors and feedback resistors inside
the amplifier. This causes the input impedance (ZI) 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 TPA3101D2. At the lower gain
settings, the input impedance could increase as high as 38.4 k
Table 2. Gain Setting
INPUT IMPEDANCE
AMPLIFIER GAIN (dB)
(k
)
GAIN1
GAIN0
TYP
0
20
32
0
1
26
16
1
0
32
16
1
36
16
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.
Copyright 2005–2007, Texas Instruments Incorporated
21
Product Folder Link(s): TPA3101D2
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| TPA3101D2PHPRG4 | 功能描述:音频放大器 10-W Stereo Class-D Aud 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 |
| TPA3101D2RGZR | 功能描述:音频放大器 10-W Stereo Class-D Aud 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 |
| TPA3101D2RGZRG4 | 功能描述:音频放大器 10-W Stereo Class-D Aud 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 |
| TPA3101D2RGZT | 功能描述:音频放大器 10-W Stereo Class-D Aud 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 |
| TPA3101D2RGZTG4 | 功能描述:音频放大器 10-W Stereo Class-D Aud 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 |
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