參數(shù)資料
型號(hào)： TDA7491HV
廠商： 意法半導(dǎo)體
英文描述： 20 W + 20 W dual BTL class-D audio amplifier
中文描述： 20瓦20瓦的雙橋接D類(lèi)音頻放大器
文件頁(yè)數(shù)： 21/26頁(yè)
文件大?。?/td> 869K
代理商： TDA7491HV
TDA7491HV
Application information
21/26
7.5
Filterless modulation
The output modulation scheme of the BTL is called unipolar pulse width modulation (PWM).
The differential output voltages change between zero and +Vcc and between zero 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.
TDA7491HV can be used without a filter before the speaker, because the frequency of the
TDA7491HV 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 27.
Unipolar PWM output
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA7491HV13TR 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(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TDA7491LP 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(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TDA7491LP13TR 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(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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(fēng)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(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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