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參數(shù)資料
| 型號： | TPA3100D2IRGZRQ1 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 21.8 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC48 |
| 封裝： | 7 X 7 MM, GREEN, PLASTIC, QFN-48 |
| 文件頁數(shù)： | 9/37頁 |
| 文件大小： | 1024K |
| 代理商： | TPA3100D2IRGZRQ1 |
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Class-D Operation
Traditional Class-D Modulation Scheme
0V
-12V
+12V
Current
OUTP
DifferentialVoltage
AcrossLoad
OUTN
TPA3100D2 Modulation Scheme
TPA3100D2-Q1
www.ti.com ......................................................................................................................................................................................... SLOS557 – SEPTEMBER 2008
This section focuses on the class-D operation of the TPA3100D2.
The traditional class-D modulation scheme, which is used in the TPA032D0x family, has a differential output in
which each output is 180° 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 traditional class-D modulation scheme with voltage and current waveforms is shown in
Figure 23. Note that even at an average of 0 V across the load (50% duty cycle), the current to the load is high,
causing high loss and, thus, causing a high supply current.
Figure 23. Traditional Class-D Modulation Scheme Output Voltage and Current Waveforms Into an
Inductive Load With No Input
The TPA3100D2 uses a modulation scheme that still has each output switching from 0 V to the supply voltage.
However, OUTP and OUTN are in phase with each other with no input. The duty cycle of OUTP is greater than
50% and OUTN is less than 50% for positive output voltages. The duty cycle of OUTP is less than 50% and
OUTN is greater than 50% for negative output voltages. The voltage across the load stays at 0 V throughout
most of the switching period, greatly reducing the switching current, which reduces I2R losses in the load.
Copyright 2008, Texas Instruments Incorporated
17
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPA3100D2RGZR-P | 21.8 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC48 |
| TPA3100D2RGZR | 21.8 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC48 |
| TPA3100D2RGZT | 21.8 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC48 |
| TPA3100D2PHPR | 21.8 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48 |
| TPA3100D2RGZRG4 | 21.8 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC48 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA3100D2PHP | 功能描述:音頻放大器 20 W Stereo Class-D Audio Amp 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 |
| TPA3100D2PHPG4 | 功能描述:音頻放大器 20 W Stereo Class-D Audio Amp 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 |
| TPA3100D2PHPR | 功能描述:音頻放大器 20 W Stereo Class-D Audio Amp 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 |
| TPA3100D2PHPRG4 | 功能描述:音頻放大器 20 W Stereo Class-D Audio Amp 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 |
| TPA3100D2-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:20-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
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