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| 型號： | TPA0103PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.1 W, 3 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| 封裝： | GREEN, PLASTIC, HTSSOP-24 |
| 文件頁數(shù)： | 26/43頁 |
| 文件大小： | 1123K |
| 代理商： | TPA0103PWPRG4 |
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TPA0103
1.75-W 3-CHANNEL STEREO AUDIO POWER AMPLIFIER
SLOS167A – JULY 1997 – REVISED MARCH 2000
32
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
output coupling capacitor, CC (continued)
Table 2. Common Load Impedances Vs Low Frequency Output Characteristics in SE Mode
RL
CC
LOWEST FREQUENCY
4
330
F
120 Hz
8
330
F
60 Hz
32
330
F
15 Hz
47,000
330
F
0.01 Hz
As Table 2 indicates, most of the bass response is attenuated into a 4-
load, an 8- load is adequate,
headphone response is good, and drive into line level inputs (a home stereo for example) is exceptional.
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 relationship shown in equation 13.
(13)
1
C
B
25 k
v
1
C
I RI
1
R
LCC
mode control resistor network, RM1, RM2, RM3
Using a readily available 1/8-in. (3.5-mm) stereo headphone jack, the control switch is closed when no plug is
inserted. When closed, the 100-k
/1-k divider (see Figure 64) pulls the MODE A input low. When a plug is
inserted, the 1-k
resistor is disconnected and the MODE A input is pulled high. When the input goes high, the
center BTL amplifier is shutdown causing the speaker to mute. The SE amplifiers then drive through the output
capacitors (CO) into the headphone jack.
Input MUX operation
The HP/LINE MUX feature gives the audio designer the flexibility of a multichip design in a single IC (see
Figure 64). The primary function of the MUX is to allow different gain settings for different types of audio loads.
Speakers typically require approximately a factor of 10 more gain for similar volume listening levels as
compared to headphones. To achieve headphone and speaker listening parity, the resistor values would need
to be set as follows:
(14)
Gain
(HP) +*
R
F(HP)
R
I(HP)
If, for example RI(HP) = 20 k and RF(HP) = 20 k then SE Gain(HP) = –1
(15)
Gain
(LINE) +*
R
F(LINE)
R
I(LINE)
If, for example RI(LINE) = 10 k and RF(LINE) = 100 k then Gain(LINE) = –10
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA0112 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH FOUR SELECTABLE GAIN SETTINGS |
| TPA0112EVM | 功能描述:音頻 IC 開發(fā)工具 TPA0112 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 |
| TPA0112PWP | 功能描述:音頻放大器 2W Stereo A 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 |
| TPA0112PWPG4 | 功能描述:音頻放大器 2W Stereo A 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 |
| TPA0112PWPR | 功能描述:音頻放大器 St 2W APA With Int Gain Settings 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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