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參數(shù)資料
| 型號(hào)： | TPA6040A4RHBT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.3 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC32 |
| 封裝： | GREEN, PLASTIC, QFN-32 |
| 文件頁(yè)數(shù)： | 13/28頁(yè) |
| 文件大小： | 685K |
| 代理商： | TPA6040A4RHBT |
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C
O
C
O
V
OUT
V
OUT
GND
V
DD
V
DD
V
/2
DD
V
BIAS
Conventional
Capacitor-Less
GND
V
DD
V
SS
V
BIAS
DirectPath
TM
Input-Blocking Capacitors
C(DCINPUT-BLOCKING)
1
2
CIN =
(6)
fc
IN +
1
2p R
IN CIN
C
IN +
1
2p fc
IN RIN
or
(7)
SLOS519A – APRIL 2007 – REVISED APRIL 2007
is connected to the headphone jack shield pin. This is the voltage on which the audio output signals are
centered. This voltage reference is half of the amplifier power supply to allow symmetrical swing of the output
voltages. Do not connect the shield to any GND reference, or large currents will result. The scenario can happen
if, for example, an accessory other than a floating GND headphone is plugged into the headphone connector.
See the second block diagram and waveform in Figure 36.
Figure 36. Amplifier Applications
DC input-blocking capacitors block the dc portion of the audio source and allow the inputs to properly bias.
Maximum performance is achieved when the inputs of the TPA6040A4 are properly biased. Performance issues
such as pop are optimized with proper input capacitors.
The dc input-blocking capacitors can be removed, provided the inputs are connected differentially and within the
input common-mode range of the amplifier, the audio signal does not exceed
±3 V, and pop performance is
sufficient.
CIN is a theoretical capacitor used for mathematical calculations only. Its value is the series combination of the
dc input-blocking capacitors, C(DCINPUT-BLOCKING). Use Equation 6 to determine the value of C(DCINPUT-BLOCKING).
For example, if CIN is equal to 0.22 F, then C(DCINPUT-BLOCKING) is equal to about 0.47 F.
The two C(DCINPUT-BLOCKING) capacitors form a high-pass filter with the input impedance of the TPA6040A4. Use
Equation 6 to calculate CIN, then calculate the cutoff frequency using CIN and the differential input impedance of
the TPA6040A4, RIN, using Equation 7. Note that the differential input impedance changes with gain. See
Figure 32 for input impedance values. The frequency and/or capacitance can be determined when one of the
two values are given.
20
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA6041A4 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH DirectPath? STEREO HEADPHONE DRIVE AND REGULATOR |
| TPA6041A4RHBR | 功能描述:音頻放大器 2W St Aud Pwr 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 |
| TPA6041A4RHBRG4 | 功能描述:音頻放大器 2W St Aud Pwr 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 |
| TPA6043A4 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH DirectPath? STEREO HEADPHONE DRIVE AND REGULATOR |
| TPA6043A4RHB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH DirectPath⑩ STEREO HEADPHONE DRIVE AND REGULATOR |
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