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參數(shù)資料
| 型號： | TPA0142PWP |
| 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)： | 19/35頁 |
| 文件大?。?/td> | 804K |
| 代理商： | TPA0142PWP |
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SE/BTL OPERATION
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
32-Step
Volume
Control
32-Step
Volume
Control
TPA0142
SLOS248E – JUNE 1999 – REVISED SEPTEMBER 2004
The ability of the TPA0142 to easily switch between BTL and SE modes is one of its most important cost-saving
features. This feature eliminates the requirement for an additional headphone amplifier in applications where
internal stereo speakers are driven in BTL mode but external headphone or speakers must be accommodated.
Two separate internal amplifiers drive OUT+ and OUT–. The SE/BTL input controls the operation of the follower
amplifier that drives LOUT– and ROUT–. When SE/BTL is held low, the amplifier is on and the device is in the
BTL mode. When SE/BTL is held high, the OUT– amplifiers are in a high output-impedance state, which
configures the device outputs as SE drivers from LOUT+ and ROUT+. IDD is reduced by approximately one-half
in SE mode. Control of the SE/BTL input can be from a logic-level CMOS source or, more typically, from a
resistor-divider network as shown in Figure 38.
Figure 38. TPA0142 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, muting the speaker (virtually open-circuits the speaker). The OUT+ amplifier then drives through the
output capacitor (CO) into the headphone jack.
26
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA0142PWPRG4 | 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA0152 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH DIGITAL VOLUME CONTROL |
| TPA0152EVM | 功能描述:音頻 IC 開發(fā)工具 TPA0152 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 |
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