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參數資料
| 型號： | TPA4861DG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封裝： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件頁數： | 13/26頁 |
| 文件大小： | 623K |
| 代理商： | TPA4861DG4 |
www.ti.com
5-V VERSUS 3.3-V OPERATION
TPA4861
SLOS163C – SEPTEMBER 1996 – REVISED JUNE 2004
The TPA4861 was designed for operation over a supply range of 2.7 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 as far as supply bypassing, gain
setting, or stability. Supply current is slightly reduced from 3.5 mA (typical) to 2.5 mA (typical). The most
important consideration is that of output power. Each amplifier in TPA4861 can produce a maximum voltage
swing of VDD– 1 V. This means, for 3.3-V operation, clipping starts to occur when VO(PP) = 2.3 V as opposed to
when VO(PP) = 4 V while operating at 5 V. The reduced voltage swing subsequently reduces maximum output
power into an 8-
load to less than 0.33 W before distortion begins to become significant.
Operation at 3.3-V supplies, as can be shown from the efficiency formula in Equation 4, consumes approximately
two-thirds of the supply power for a given output-power level than operation from 5-V supplies. When the
application demands less than 500 mW, 3.3-V operation should be strongly considered, especially in
battery-powered applications.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA4861DR | 功能描述:音頻放大器 1-W Mono Audio Power Amplifier 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 |
| TPA4861DRG4 | 功能描述:音頻放大器 1-W Mono Audio Power Amplifier 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 |
| TPA-5 | 功能描述:保險絲 TELPOWER ALARM FUSE RoHS:否 制造商:Littelfuse 產品:Surface Mount Fuses 電流額定值:0.5 A 電壓額定值:600 V 保險絲類型:Fast Acting 保險絲大小/組:Nano 尺寸:12.1 mm L x 4.5 mm W 安裝風格: 端接類型:SMD/SMT 系列:485 |
| TPA-5,0-ADV | 制造商:PMK 功能描述:ADVANCED PROBE ACCESSORIES 5, 0MM 制造商:PMK 功能描述:ADVANCED PROBE ACCESSORIES 5, 0MM; Kit Contents:Probe Kit, 18 Piece; Body Diameter:5.0mm; For Use With:5mm PMK Probes; Primary Product 1:220mm Ground Lead with Crocodile Clips; Primary Product 2:Sprung Hook; Primary Product 3:Contact;RoHS Compliant: NA |
| TPA-5,0-BAS | 制造商:PMK 功能描述:BASIC PROBE ACCESSORIES 5, 0MM 制造商:PMK 功能描述:BASIC PROBE ACCESSORIES 5, 0MM; Kit Contents:Probe Kit, 4 Piece; Body Diameter:5.0mm; For Use With:5mm PMK Probes; Primary Product 1:220mm Ground Lead with Crocodile Clips; Primary Product 2:Sprung Hook; Primary Product 3:Contact ;RoHS Compliant: NA |
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