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參數資料
| 型號： | TDA7491LP13TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| 封裝： | ROHS COMPLIANT, SSOP-36 |
| 文件頁數： | 22/34頁 |
| 文件大?。?/td> | 882K |
| 代理商： | TDA7491LP13TR |
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TDA7491LP
Applications information
Doc ID 13541 Rev 4
29/34
7.5
Filterless modulation
The output modulation scheme of the BTL is called unipolar pulse width modulation (PWM).
The differential output voltages change between 0 V and +VCC and between 0 V and -VCC.
This is in contrast to the traditional bipolar PWM outputs which change between +VCC
and -VCC.
An advantage of this scheme is that it effectively doubles the switching frequency of the
differential output waveform. The OUTP and OUTN are in the same phase when the input is
zero, then the switching current is low and the loss in the load is small. In practice, a short
delay is introduced between these two outputs in order to avoid the BTL output switching at
the same time.
TDA7491LP can be used without a filter before the speaker, because the frequency of the
TDA7491LP output is beyond the audio frequency, the audio signal can be recovered by the
inherent inductance of the speaker and natural filter of the human ear.
Figure 40.
Unipolar PWM output
INP
INN
OUTP
OUTN
Differential
OUT
相關PDF資料 |
PDF描述 |
|---|---|
| TDA7491LP | 5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| TDA7491MV13TR | 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| TDA7491MV | 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| TDA7491P13TR | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| TDA7491P | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TDA7491MV | 功能描述:音頻放大器 25W Mono BTL Class-D 4-Select dB 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 |
| TDA7491MV13TR | 功能描述:音頻放大器 25W Mono BTL Class-D 4-Select dB 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 |
| TDA7491P | 功能描述:音頻放大器 20W Dual BTL Class D 18V VCC Audio 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 |
| TDA7491P13TR | 功能描述:音頻放大器 20W Dual BTL Class D 18V VCC Audio 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 |
| TDA7492 | 功能描述:音頻放大器 50W + 50W Dual BTL Class-D 4-Select dB 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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