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參數資料
| 型號： | TPA6017A2PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.9 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封裝： | GREEN, PLASTIC, HTSSOP-20 |
| 文件頁數： | 11/29頁 |
| 文件大小： | 575K |
| 代理商： | TPA6017A2PWPRG4 |
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TPA6017A2
SLOS386A NOVEMBER 2001 REVISED APRIL 2007
19
www.ti.com
APPLICATION INFORMATION
bridged-tied load versus single-ended mode
Figure 31 shows a Class-AB audio power amplifier (APA) in a BTL configuration. The TPA6017A2 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
× VO(PP) into the power
equation, where voltage is squared, yields 4
× the output power from the same supply rail and load impedance
(see equation 3).
Power
+
V
(rms)
2
R
L
(3)
V
(rms) +
V
O(PP)
22
RL
2x VO(PP)
VO(PP)
VDD
Figure 31. 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 32. A coupling capacitor is required to block the
dc offset voltage from reaching the load. These capacitors can be quite large (approximately 33
F to 1000 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 4.
fc +
1
2
pR
L
C
(4)
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| TPA6020A2RGWTG4 | 2.15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC20 |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA6019A4PWPR | 制造商:Texas Instruments 功能描述:AUDIO AMP 制造商:TI 功能描述:STEREO BTL 1W AUDIO POWER AMPLIFIER |
| TPA6020A2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.8-W STEREO FULLY DIFFERENTIAL AUDIO POWER AMPLIFIER |
| TPA6020A2EVM | 功能描述:音頻 IC 開發工具 TPA6020A2 Eval Mod RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TPA6020A2RGW | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.8-W STEREO FULLY DIFFERENTIAL AUDIO POWER AMPLIFIER |
| TPA6020A2RGWR | 功能描述:音頻放大器 Stereo Fully Diff Class-AB RoHS:否 制造商:STMicroelectronics 產品: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 |
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