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參數(shù)資料
| 型號： | TPA6030A4PWPR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28 |
| 封裝： | GREEN, PLASTIC, TSSOP-28 |
| 文件頁數(shù)： | 10/32頁 |
| 文件大?。?/td> | 698K |
| 代理商： | TPA6030A4PWPR |
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TPA6030A4
SLOS395B DECEMBER 2002 REVISED JANUARY 2005
www.ti.com
18
3 dB
fc
fc(highpass) +
1
2pRICI
(6)
The value of CI is important to consider as it directly affects the low frequency, or bass, performance of the circuit.
Futhermore, the input impedance changes with a change in volume. The higher the volume, the lower the input impedance.
To determine the appropriate capacitor value, reconfigure equation 6 into equation 7. The value of the input resistor, RI,
can be determined from Figure 12.
CI +
1
2pRI fc
Low leakage tantalum or ceramic capacitors are recommended. When polarized capacitors are used, the positive side of
the capacitor should face the amplifier input in most applications as the dc level there is held at VCC/2, which is likely higher
than the source dc level. Note that it is important to confirm the capacitor polarity in each specific application.
Recommended capacitor values are between 0.1 F and 1 F.
Power Supply Decoupling, CS
The TPA6030A4 is a high-performance audio amplifier that requires adequate power supply decoupling to ensure the
output total harmonic distortion (THD) is as low as possible. Power supply decoupling also prevents oscillations for long
lead lengths between the amplifier and the speaker. The optimum decoupling is achieved by using two capacitors of
different types to reduce different types of noise on the power supply leads. For higher frequency transients, spikes, or
digital noise on the power supply, a good low equivalent-series-resistance (ESR) ceramic capacitor, typically 0.1 F, should
be placed as close as possible to the device VCC pin. For filtering lower frequency noise signals, a larger aluminum
electrolytic capacitor of 10 F or greater should be placed near the audio power amplifier.
Midrail Bypass Capacitor, C(BYPASS)
The midrail bypass capacitor, C(BYPASS), has several important functions. During start-up or recovery from shutdown mode,
C(BYPASS) determines the rate at which the amplifier starts up. C(BYPASS) also reduces noise coupled into the output signal
by the power supply. Generally, ceramic or tantalum low-ESR capacitors with values ranging from 0.1 F to 1.0 F are
recommended for the best THD and noise performance.
Output Coupling Capacitor, CC
In a typical single-supply SE configuration, an output coupling capacitor, CC, is required to block the dc bias at the output
of the amplifier, thus preventing dc currents from flowing through the load. This in turn reduces the current draw of the
amplifier significantly. As with the input coupling capacitor, the output coupling capacitor and impedance of the load form
a high pass filter governed by equation 8.
3 dB
fc
fc(highpass) +
1
2pRLCC
(8)
(7)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA6030A4PWPRG4 | 功能描述:音頻放大器 Wide Supply Voltage Low Power Class-AB 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 |
| TPA6040A4 | 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 |
| TPA6040A4EVM | 功能描述:音頻 IC 開發(fā)工具 TPA6040A4 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 |
| TPA6040A4RHB | 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 |
| TPA6040A4RHBR | 功能描述:音頻放大器 2W Stereo Aud Pwr 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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