參數(shù)資料
型號(hào)： TPA721DGNR
元件分類： 音頻放大器
英文描述： Single Audio Amplifier
中文描述： 單音頻放大器
文件頁(yè)數(shù)： 12/22頁(yè)
文件大?。?/td> 332K
代理商： TPA721DGNR
TPA721
700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER
SLOS231C
–
NOVEMBER 1998
–
REVISED APRIL 2001
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
bridged-tied load
Figure 23 shows a linear audio power amplifier (APA) in a BTL configuration. The TPA721 BTL amplifier consists
of two linear 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 1).
Power
V(rms)
RL
2
(1)
V(rms)
VO(PP)
2 2
RL
2x VO(PP)
VO(PP)
–
VO(PP)
VDD
VDD
Figure 23. Bridge-Tied Load Configuration
In a typical portable handheld equipment sound channel operating at 3.3 V, bridging raises the power into an
8-
speaker from a singled-ended (SE, ground reference) limit of 62.5 mW to 250 mW. 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 24. 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 2.
f(corner)
1
2 RLCC
(2)
相關(guān)PDF資料
PDF描述
TPA721DR Single Audio Amplifier
TPA731DGNR Single Audio Amplifier
TPA731DR Single Audio Amplifier
TPA751DGNR Amplifier. Other
TPA751DR Amplifier. Other
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPA721DGNRG4 功能描述:音頻放大器 Mono Class-AB w/Active HIgh Shtdwn 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
TPA721DR 功能描述:音頻放大器 700mW Lw V Audio 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
TPA721DRG4 功能描述:音頻放大器 Mono Class-AB w/Active HIgh Shtdwn 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
TPA721EVM 制造商:TI 制造商全稱:Texas Instruments 功能描述:700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER
TPA721MSOPEVM 功能描述:音頻 IC 開發(fā)工具 TPA721MSOP Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*