- 您現在的位置：買賣IC網 > PDF目錄98267 > TPA0112PWPG4 (TEXAS INSTRUMENTS INC) 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 PDF資料下載
參數資料
| 型號： | TPA0112PWPG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
| 封裝： | GREEN, PLASTIC, HTSSOP-24 |
| 文件頁數： | 16/34頁 |
| 文件大小： | 655K |
| 代理商： | TPA0112PWPG4 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁
www.ti.com
BRIDGE-TIED LOAD VERSUS SINGLE-ENDED MODE
Power +
V
(RMS)
2
R
L
V
(RMS) +
V
O(PP)
2 2
(5)
RL
2x VO(PP)
VO(PP)
–VO(PP)
VDD
fc +
1
2 p R
L CC
(6)
TPA0112
SLOS204C – MAY 1999 – REVISED SEPTEMBER 2004
Figure 44 shows a Class-AB audio power amplifier (APA) in a BTL configuration. The TPA0112 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).
Figure 44. 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 improve-
ment—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 45. 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 6.
23
相關PDF資料 |
PDF描述 |
|---|---|
| TPA0112PWPRG4 | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
| TPA0122PWPG4 | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
| TPA0122PWPRG4 | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
| TPA0122PWP | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
| TPA0122PWPR | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA0112PWPR | 功能描述:音頻放大器 St 2W APA With Int Gain Settings 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 |
| TPA0112PWPRG4 | 功能描述:音頻放大器 St 2W APA With Int Gain Settings 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 |
| TPA0122 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH FOUR SELECTABLE GAIN SETTINGS |
| TPA0122EVM | 功能描述:音頻 IC 開發工具 TPA0122 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 |
| TPA0122PWP | 功能描述:音頻放大器 2W Stereo A 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 |
發布緊急采購，3分鐘左右您將得到回復。