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參數(shù)資料
| 型號(hào)： | TPA0202PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| 封裝： | GREEN, PLASTIC, HTSSOP-24 |
| 文件頁數(shù)： | 17/45頁 |
| 文件大?。?/td> | 1035K |
| 代理商： | TPA0202PWPRG4 |
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TPA0202
2-W STEREO AUDIO POWER AMPLIFIER
SLOS205B – FEBRUARY 1998 – REVISED DECEMBER 2000
24
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
bridged-tied load versus single-ended mode
Figure 59 shows a linear audio power amplifier (APA) in a BTL configuration. The TPA0202 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
× 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 1).
Power
+
V
(rms)
2
R
L
(1)
V
(rms) +
V
O(PP)
22
RL
2x VO(PP)
VO(PP)
–VO(PP)
VDD
Figure 59. 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 60. 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 2.
fc +
1
2
pR
L
C
(2)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPA0211DGN | 2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA0211DGNR | 2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA0211DGNG4 | 2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA0211DGNRG4 | 2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA0212PWPG4 | 2.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA0211 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W MONO AUDIO POWER AMPLIFIER |
| TPA0211_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W MONO AUDIO POWER AMPLIFIER |
| TPA0211DGN | 功能描述:音頻放大器 2W Mono 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 |
| TPA0211DGNG4 | 功能描述:音頻放大器 Mono Class-AB w/Mono Hdphone Drive 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 |
| TPA0211DGNR | 功能描述:音頻放大器 Mono Class-AB w/Mono Hdphone Drive 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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