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參數資料
| 型號： | TPA3107D2PAPT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64 |
| 封裝： | 10 X 10 MM, GREEN, PLASTIC, HTQFP-64 |
| 文件頁數： | 16/32頁 |
| 文件大小： | 1027K |
| 代理商： | TPA3107D2PAPT |
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Analyzer
20Hz-20kHz
(a)BasicClass-AB
APA
Signal
Generator
PowerSupply
Analyzer
20Hz-20kHz
R
L
(b)Filter-FreeandTraditionalClass-D
Class-D APA
Signal
Generator
PowerSupply
R
L
Low-PassRC
Filter
Low-PassRC
Filter
(Seenote A)
DIFFERENTIAL INPUT AND BTL OUTPUT
SLOS509B – OCTOBER 2006 – REVISED JULY 2007
A.
For efficiency measurements with filter-free Class-D, RL should be an inductive load like a speaker.
Figure 28. Audio Measurement Systems
The TPA31071D2 uses a modulation scheme that does not require an output filter for operation, but they do
sometimes require an RC low-pass filter when making measurements. This is because some analyzer inputs
cannot accurately process the rapidly changing square-wave output and therefore record an extremely high level
of distortion. The RC low-pass measurement filter is used to remove the modulated waveforms so the analyzer
can measure the output sine wave.
All of the class-D APAs and many class-AB APAs have differential inputs and bridge-tied load (BTL) outputs.
Differential inputs have two input pins per channel and amplify the difference in voltage between the pins.
Differential inputs reduce the common-mode noise and distortion of the input circuit. BTL is a term commonly
used in audio to describe differential outputs. BTL outputs have two output pins providing voltages that are 180
degrees out of phase. The load is connected between these pins. This has the added benefits of quadrupling
the output power to the load and eliminating a dc blocking capacitor.
A block diagram of the measurement circuit is shown in Figure 29. The differential input is a balanced input,
meaning the positive (+) and negative (-) pins have the same impedance to ground. Similarly, the BTL output
equates to a balanced output.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA3107D2PAPTG4 | 功能描述:音頻放大器 15W Stereo Class-D Audio Power 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 |
| TPA311 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:350-mW MONO AUDIO POWER AMPLIFIER |
| TPA311_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:350-mW MONO AUDIO POWER AMPLIFIER |
| TPA3110D2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:15-W FILTER-FREE STEREO CLASS-D AUDIO POWER AMPLIFIER with SPEAKERGUARD? |
| TPA3110D2_0911 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:15-W FILTER-FREE STEREO CLASS-D AUDIO POWER AMPLIFIER with SPEAKERGUARD? |
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