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參數資料
| 型號： | TPA3123D2PWPR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 25 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| 封裝： | GREEN, PLASTIC, TSSOP-24 |
| 文件頁數： | 4/30頁 |
| 文件大小： | 887K |
| 代理商： | TPA3123D2PWPR |
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+VCC
0V
OutputCurrent
+VCC
0V
+VCC
0V
+VCC
0V
–VCC
DifferentialVoltage
AcrossSpeaker
SLOS541C – JULY 2007 – REVISED AUGUST 2010
www.ti.com
APPLICATION INFORMATION
CLASS-D OPERATION
This section focuses on the class-D operation of the TPA3123D2.
Traditional Class-D Modulation Scheme
The TPA3123D2 operates in AD mode. There are two main configurations that may be used. For stereo
operation, the TPA3123D2 should be configured in a single-ended (SE) half-bridge amplifier. For mono
applications, TPA3123D2 may be used as a bridge-tied-load (BTL) amplifier. The traditional class-D modulation
scheme, which is used in the TPA3123D2 BTL configuration, has a differential output where each output is 180
degrees out of phase and changes from ground to the supply voltage, VCC. Therefore, the differential prefiltered
output varies between positive and negative VCC, where filtered 50% duty cycle yields 0 V across the load. The
class-D modulation scheme with voltage and current waveforms is shown in Figure 23 and Figure 24.
Figure 23. Class-D Modulation for TPA3123D2 SE Configuration
Figure 24. Class-D Modulation for TPA3123D2 BTL Configuration
Supply Pumping
One issue encountered in single-ended (SE) class-D amplifier designs is supply pumping. Power-supply pumping
is a rise in the local supply voltage due to energy being driven back to the supply by operation of the class-D
amplifier. This phenomenon is most evident at low audio frequencies and when both channels are operating at
the same frequency and phase. At low levels, power-supply pumping results in distortion in the audio output due
to fluctuations in supply voltage. At higher levels, pumping can cause the overvoltage protection to operate,
which temporarily shuts down the audio output.
12
Copyright 2007–2010, Texas Instruments Incorporated
Product Folder Link(s) :TPA3123D2
相關PDF資料 |
PDF描述 |
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| TPA3123D2PWP | 25 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| TPA3124D2PWPG4 | AUDIO AMPLIFIER, PDSO24 |
| TPA3124D2PWPRG4 | AUDIO AMPLIFIER, PDSO24 |
| TPA3124D2PWPR | AUDIO AMPLIFIER, PDSO24 |
| TPA3124D2PWP | AUDIO AMPLIFIER, PDSO24 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA3123D2PWPRG4 | 功能描述:音頻放大器 25W Stereo Class D Aud Pwr Amp RoHS:否 制造商:STMicroelectronics 產品: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 |
| TPA3124D2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:15-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
| TPA3124D2_1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:15-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
| TPA3124D2EVM | 功能描述:音頻 IC 開發工具 TPA3124D2EVM Eval Mod RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TPA3124D2PWP | 功能描述:音頻放大器 15W Stereo Class-D Aud Pwr Amp RoHS:否 制造商:STMicroelectronics 產品: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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