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參數(shù)資料
| 型號： | TPA711DGNR |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | Single Audio Amplifier |
| 中文描述： | 單音頻放大器 |
| 文件頁數(shù)： | 26/32頁 |
| 文件大?。?/td> | 522K |
| 代理商： | TPA711DGNR |
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TPA711
700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER
SLOS230C
–
NOVEMBER 1998
–
REVISED APRIL 2001
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
250 k
C
B
1
R
F
R
I
C
I
1
R
L
C
C
output coupling capacitor, C
C
In the typical single-supply SE configuration, an output coupling capacitor (C
C
) 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)
fc(high)
1
2 RLCC
–
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 C
C
are required to pass low
frequencies into the load. Consider the example where a C
C
of 330
μ
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
32
330
μ
F
330
μ
F
330
μ
F
60 Hz
15 Hz
47,000
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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA711DGNRG4 | 功能描述:音頻放大器 Mono Class-AB w/Mono Hdphone Drive 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 |
| TPA711DR | 功能描述:音頻放大器 700mW Lw V Audio 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 |
| TPA711DRG4 | 功能描述:音頻放大器 Mono Class-AB w/Mono Hdphone Drive 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 |
| TPA711EVM | 制造商:TI 制造商全稱:Texas Instruments 功能描述:700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER |
| TPA711MSOPEVM | 功能描述:音頻 IC 開發(fā)工具 TPA711MSOP Eval Mod 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 |
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