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| 型号： | TPA711D |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封装： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件页数： | 19/38页 |
| 文件大小： | 973K |
| 代理商： | TPA711D |
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TPA711
700mW MONO LOW VOLTAGE AUDIO POWER AMPLIFIER
SLOS230D NOVEMBER 1998 REVISED OCTOBER 2002
26
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
component selection (continued)
The output coupling capacitor required in single-supply SE mode also places additional constraints on the
selection of other components in the amplifier circuit. The rules described earlier still hold with the addition of
the following relationship:
(12)
10
C
B
250 k
v
1
R
F )
R
I
C
I
1
R
L
C
output coupling capacitor, CC
In the typical single-supply SE configuration, an output coupling capacitor (CC) is required to block the dc bias
at the output of the amplifier, thus preventing dc currents in the load. As with the input coupling capacitor, the
output coupling capacitor and impedance of the load form a high-pass filter governed by equation 13.
(13)
f
c(high) +
1
2
pR
L
C
3 dB
fc
The main disadvantage, from a performance standpoint, is the load impedances are typically small, which drives
the low-frequency corner higher, degrading the bass response. Large values of CC are required to pass low
frequencies into the load. Consider the example where a CC of 330 F is chosen and loads vary from 4 ,
8
, 32 , and 47 k. Table 2 summarizes the frequency response characteristics of each configuration.
Table 2. Common Load Impedances Vs Low Frequency Output Characteristics in SE Mode
RL
CC
LOWEST FREQUENCY
8
330
F
60 Hz
32
330
F
15 Hz
47,000
330
F
0.01 Hz
As Table 2 indicates, an 8-
load is adequate, earphone response is good, and drive into line level inputs (a
home stereo for example) is exceptional.
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| TPA711DG4 | 功能描述:音频放大器 Mono Class-AB w/Mono Hdphone Drive 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 |
| TPA711DGN | 功能描述:音频放大器 Mono Class-AB w/Mono Hdphone Drive 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 |
| TPA711DGNG4 | 功能描述:音频放大器 Mono Class-AB w/Mono Hdphone Drive 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 |
| TPA711DGNR | 功能描述:音频放大器 700mW Lw V Audio 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 |
| TPA711DGNRG4 | 功能描述:音频放大器 Mono Class-AB w/Mono Hdphone Drive 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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