參數(shù)資料
型號: 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類音頻放大器
文件頁數(shù): 18/26頁
文件大?。?/td> 869K
代理商: TDA7491HV
Application information
TDA7491HV
18/26
7
Application information
7.1
Mode selection
The three operating modes of the TDA7491HV are set by the two inputs STBY (pin 20) and
MUTE (pin 21).
Standby mode: all circuits are turned off, very low current consumption.
Mute mode: inputs are connected to ground and the positive and negative PWM
outputs are at 50% duty cycle.
Play mode: the amplifiers are active.
"
"
"
The protection functions of the TDA7491HV are realized by pulling down the voltages of the
STBY and MUTE inputs shown in
Figure 23
. The input current of the corresponding pins
must be limited to 200 μA.
Table 6.
Figure 23.
STBY and MUTE circuit
Figure 24.
Turn on/off sequence for minimizing speaker “pop”
Mode settings
Mode Selection
STBY
MUTE
Standby
L
(1)
1.
Drive levels defined in
Table 5: Electrical specifications on page 7
.
X (don’t care)
Mute
H
(1)
L
Play
H
H
TDA7491HV
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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