- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄365910 > TPA751DR Amplifier. Other PDF資料下載
參數(shù)資料
| 型號： | TPA751DR |
| 元件分類： | 音頻放大器 |
| 英文描述： | Amplifier. Other |
| 中文描述： | 放大器。其他 |
| 文件頁數(shù)： | 18/22頁 |
| 文件大?。?/td> | 336K |
| 代理商： | TPA751DR |
TPA721
700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER
SLOS231D
–
NOVEMBER 1998
–
REVISED OCTOBER 2002
18
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
5-V versus 3.3-V operation
The TPA721 operates over a supply range of 2.5 V to 5.5 V. This data sheet provides full specifications for 5-V
and 3.3-V operation, as these are considered to be the two most common standard voltages. There are no
special considerations for 3.3-V versus 5-V operation with respect to supply bypassing, gain setting, or stability.
The most important consideration is that of output power. Each amplifier in TPA721 can produce a maximum
voltage swing of V
DD
–
1 V. This means, for 3.3-V operation, clipping starts to occur when V
O(PP)
= 2.3 V as
opposed to V
O(PP)
= 4 V at 5 V. The reduced voltage swing subsequently reduces maximum output power into
an 8-
load before distortion becomes significant.
Operation from 3.3-V supplies, as can be shown from the efficiency formula in equation 4, consumes
approximately two-thirds the supply power of operation from 5-V supplies for a given output-power level.
headroom and thermal considerations
Linear power amplifiers dissipate a significant amount of heat in the package under normal operating conditions.
A typical music CD requires 12 dB to 15 dB of dynamic headroom to pass the loudest portions without distortion
as compared with the average power output. From the TPA721 data sheet, one can see that when the TPA721
is operating from a 5-V supply into an 8-
speaker that 700 mW peaks are available. Converting watts to dB:
PdB
10LogPW
10Log 700 mW
–
1.5 dB
Subtracting the headroom restriction to obtain the average listening level without distortion yields:
–
1.5 dB
–
15 dB =
–
16.5 (15 dB headroom)
–
1.5 dB
–
12 dB =
–
13.5 (12 dB headroom)
–
1.5 dB
–
9 dB =
–
10.5 (9 dB headroom)
–
1.5 dB
–
6 dB =
–
7.5 (6 dB headroom)
–
1.5 dB
–
3 dB =
–
4.5 (3 dB headroom)
Converting dB back into watts:
PW
10PdB 10
22 mW (15 dB headroom)
44 mW (12 dB headroom)
88 mW (9 dB headroom)
175 mW (6 dB headroom)
350 mW (3 dB headroom)
相關PDF資料 |
PDF描述 |
|---|---|
| TPASERIES | TRISIL |
| TPA6203A1GQV | Switchlocks |
| TPA180 | TRISIL |
| TPA200 | TRISIL |
| TPA220 | TRISIL |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPA751DRG4 | 功能描述:音頻放大器 Mono Diff Input 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 |
| TPA751EVM | 功能描述:音頻 IC 開發(fā)工具 TPA751 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 |
| TPA751GQS | 制造商:Texas Instruments 功能描述:AUD AMP SPKR 1CH MONO 0.7W CLS-AB 24VFBGA - Tape and Reel |
| TPA751GQSR | 功能描述:音頻放大器 Mono Diff Input 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 |
| TPA77930DGK | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復。