參數(shù)資料
型號: TPA0122PWPRG4
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): 21/33頁
文件大小: 688K
代理商: TPA0122PWPRG4
www.ti.com
ROUT+
21
R
MUX
RHPIN
RLINEIN
+
23
20
8
RIN
ROUT
16
+
1 k
COUTR
330
F
100 k
SE/BTL
15
100 k
VDD
Volume
Control
Volume
Control
PC-BEEP OPERATION
TPA0122
SLOS247C – JUNE 1999 – REVISED SEPTEMBER 2004
Figure 47. TPA0122 Resistor Divider Network Circuit
Using a readily available 1/8-in. (3,5 mm) stereo headphone jack, the control switch is closed when no plug is
inserted. When closed, the 100-k
/1-k divider pulls the SE/BTL input low. When a plug is inserted, the 1-k
resistor is disconnected and the SE/BTL input is pulled high. When the input goes high, the OUT– amplifier is
shut down causing the speaker to mute (virtually open-circuits the speaker). The OUT+ amplifier then drives
through the output capacitor (CO) into the headphone jack.
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 normally activated automatically, but may be selected
manually by pulling PCB ENABLE high. When the PC-BEEP input is active, both of the 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 and
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 with an amplitude of 1.5
Vpp or greater. 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 8 rising edges. When the signal is no longer detected, the amplifier
returns to its previous operating mode and volume setting.
When PCB ENABLE is held high, PC-BEEP is selected and the LINEIN and HPIN inputs are deactivated
regardless of the input signal. PCB ENABLE has an internal 100-k
pulldown resistor and trips at approximately
VDD/2.
28
相關(guān)PDF資料
PDF描述
TPA0122PWP 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24
TPA0122PWPR 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24
TPA0132PWPRG4 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24
TPA0142PWPR 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24
TPA0142PWP 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPA0132 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
TPA0132EVM 功能描述:音頻 IC 開發(fā)工具 TPA0132 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
TPA0132PWP 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
TPA0132PWPG4 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
TPA0132PWPR 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