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| 型号： | TPA0103PWPG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 2.1 W, 3 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| 封装： | GREEN, PLASTIC, HTSSOP-24 |
| 文件页数： | 26/43页 |
| 文件大小： | 1123K |
| 代理商： | TPA0103PWPG4 |
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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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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA0103PWPR | 功能描述:音频放大器 1.75-W STEREO AUDIO 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 |
| TPA0103PWPRG4 | 功能描述:音频放大器 1.75-W STEREO AUDIO 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 |
| TPA0112 | 制造商:TI 制造商全称:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH FOUR SELECTABLE GAIN SETTINGS |
| TPA0112EVM | 功能描述:音频 IC 开发工具 TPA0112 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TPA0112PWP | 功能描述:音频放大器 2W Stereo A 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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