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參數(shù)資料
| 型號： | TPA0132PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
| 封裝： | GREEN, PLASTIC, HTSSOP-24 |
| 文件頁數(shù)： | 19/33頁 |
| 文件大小： | 788K |
| 代理商： | TPA0132PWPRG4 |
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PC-BEEP OPERATION
C
PCB w
1
2p
PCB
(100 kW)
(13)
INPUT MUX OPERATION
ROUT+
21
R
MUX
RHPIN
RLINEIN
+
23
20
8
RIN
ROUT
16
+
32-Step
Volume
Control
32-Step
Volume
Control
CIRHP
0.47
F
CIRLINE
0.47
F
Right
Headphone
Input Signal
Right Line
Input Signal
CRIN
0.47
F
TPA0132
SLOS223E – MAY 1999 – REVISED SEPTEMBER 2004
The PC-BEEP input allows a system beep to be sent directly from a computer through the amplifier to the
speakers with few external components. The input is activated automatically. When the PC-BEEP input is active,
both LINEIN and HPIN inputs are deselected, and both the left and right channels are driven in BTL mode with
the signal from PC-BEEP. The gain from the PC-BEEP input to the speakers is fixed at 0.3 V/V and is
independent of the volume setting. When the PC-BEEP input is deselected, the amplifier returns to the previous
operating mode and volume setting. Furthermore, if the amplifier is in shutdown mode, activating PC-BEEP takes
the device out of shutdown, outputs the PC-BEEP signal, then returns the amplifier to shutdown mode.
When PCB ENABLE is held low, the amplifier automatically switches to PC-BEEP mode after detecting a valid
signal at the PC-BEEP input. The preferred input signal is a square wave or pulse train. To be accurately
detected, the signal must have a minimum of 1.5-Vpp amplitude, rise and fall times of less than 0.1 s and a
minimum of eight rising edges. When the signal is no longer detected, the amplifier returns to its previous
operating mode and volume setting.
To ac-couple the PC-BEEP input, choose a coupling-capacitor value to satisfy Equation 13.
The PC-BEEP input can also be dc-coupled to avoid using this coupling capacitor. The pin normally rests at
midrail when no signal is present.
Figure 38. TPA0132 Example Input MUX Circuit
The input MUX provides the user with a means to select from two different audio sources. In BTL mode, the
LINE inputs are selected. In SE mode, the HP inputs are selected. RIN and LIN must be grounded in SE mode.
26
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA0142 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL |
| TPA0142EVM | 功能描述:音頻 IC 開發(fā)工具 TPA0142 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TPA0142PWP | 功能描述:音頻放大器 2W Stereo A 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 |
| TPA0142PWPG4 | 功能描述:音頻放大器 2W Stereo APA With DC Volume Control 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 |
| TPA0142PWPR | 功能描述:音頻放大器 2W Stereo APA With DC Volume Control 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 |
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