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參數(shù)資料
| 型號： | TPA6030A4PWP |
| 元件分類： | 音頻放大器 |
| 英文描述： | Slide |
| 中文描述： | 放大器。其他 |
| 文件頁數(shù)： | 26/33頁 |
| 文件大?。?/td> | 469K |
| 代理商： | TPA6030A4PWP |
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TPA6011A4
SLOS392
–
FEBRUARY 2002
26
www.ti.com
APPLICATION INFORMATION
bridged-tied load versus single-ended lode
Figure 35 shows a Class-AB audio power amplifier (APA) in a BTL configuration. The TPA6011A4 BTL amplifier
consists of two Class-AB amplifiers driving both ends of the load. There are several potential benefits to this
differential drive configuration, but, initially consider power to the load. The differential drive to the speaker
means that as one side is slewing up, the other side is slewing down, and vice versa. This in effect doubles the
voltage swing on the load as compared to a ground referenced load. Plugging 2
×
V
O(PP)
into the power
equation, where voltage is squared, yields 4
×
the output power from the same supply rail and load impedance
(see equation 5).
Power
V
(rms)
R
L
2
(5)
V
(rms)
V
O(PP)
2 2
RL
2x VO(PP)
VO(PP)
–
VO(PP)
VDD
VDD
Figure 35. Bridge-Tied Load Configuration
In a typical computer sound channel operating at 5 V, bridging raises the power into an 8-
speaker from a
singled-ended (SE, ground reference) limit of 250 mW to 1 W. In sound power that is a 6-dB improvement, which
is loudness that can be heard. In addition to increased power there are frequency response concerns. Consider
the single-supply SE configuration shown in Figure 36. A coupling capacitor is required to block the dc offset
voltage from reaching the load. These capacitors can be quite large (approximately 33
μ
F to 1000
μ
F), so they
tend to be expensive, heavy, occupy valuable PCB area, and have the additional drawback of limiting
low-frequency performance of the system. This frequency limiting effect is due to the high-pass filter network
created with the speaker impedance and the coupling capacitance and is calculated with equation 6.
f
(c)
1
2 R
L
C
C
(6)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPA6030A4PWPG4 | 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6030A4PWPR | 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| 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 |
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