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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： | 25/43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
31
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
midrail bypass capacitor, CB
The midrail bypass capacitor, CB, serves several important functions. During startup or recovery from shutdown
mode, CB determines the rate at which the amplifier starts up. The second function is to reduce noise produced
by the power supply caused by coupling into the output drive signal. This noise is from the midrail generation
circuit internal to the amplifier. The capacitor is fed from a 25-k
source inside the amplifier. To keep the start-up
pop as low as possible, the relationship shown in equation 11 should be maintained.
(11)
1
C
B
25 k
W
v
1
C
IRI
As an example, consider a circuit where CB is 0.1 F, CI is 0.22 F and RI is 10 k. Inserting these values into
the equation 10 we get 400
≤ 454 which satisfies the rule. Bypass capacitor, CB, values of 0.1 F to 1 F ceramic
or tantalum low-ESR capacitors are recommended for the best THD and noise performance.
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 12.
(12)
f
c(high) +
1
2
pR
L CC
–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
, to 47 k. Table 2 summarizes the frequency response characteristics of each configuration.
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PDF描述 |
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| TPA0103PWPRG4 | 2.1 W, 3 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
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| TPA0112PWP | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
| TPA0112PWPG4 | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
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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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