- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98277 > TPA741DGN (TEXAS INSTRUMENTS INC) 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 PDF資料下載
參數(shù)資料
| 型號： | TPA741DGN |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封裝： | GREEN, PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 5/27頁 |
| 文件大?。?/td> | 760K |
| 代理商： | TPA741DGN |
第1頁第2頁第3頁第4頁當前第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
www.ti.com
I
DD(RMS) +
2V
P
p
R
L
P
SUP + VDD
I
DD(RMS) +
V
DD 2VP
p
R
L
Efficiency +
P
L
P
SUP
where
P
L +
V
L(RMS)
2
R
L
+
Vp
2
2R
L
V
L(RMS) +
V
P
2
(3)
Efficiency of a BTL configuration
+
p
V
P
4V
DD
+
p
2 P
LRL
1 2
4V
DD
(4)
TPA741
SLOS316C – JUNE 2000 – REVISED JUNE 2004
APPLICATION INFORMATION (continued)
Table 1 employs Equation 4 to calculate efficiencies for three different output power levels. The efficiency of the
amplifier is quite low for lower power levels and rises sharply as power to the load is increased, resulting in a
nearly flat internal power dissipation over the normal operating range. The internal dissipation at full output power
is less than in the half power range. Calculating the efficiency for a specific system is the key to proper power
supply design.
Table 1. Efficiency vs Output Power in 3.3-V, 8-
, BTL Systems
INTERNAL
OUTPUT POWER
EFFICIENCY
PEAK VOLTAGE
DISSIPATION
(W)
(%)
(V)
(W)
0.125
33.6
1.41
0.26
0.25
47.6
2.00
0.29
0.375
58.3
2.45(1)
0.28
(1)
High-peak voltage values cause the THD to increase.
A final point to remember about linear amplifiers (either SE or BTL) is how to manipulate the terms in the
efficiency equation to utmost advantage when possible. In Equation 4, VDD is in the denominator. This indicates
that as VDD goes down, efficiency goes up.
13
相關PDF資料 |
PDF描述 |
|---|---|
| TPA741DR | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA741D | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA741DG4 | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA741DRG4 | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA741DGNRG4 | 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPA741DGNG4 | 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 |
| TPA741DGNR | 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 |
| TPA741DGNRG4 | 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 |
| TPA741DR | 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 |
| TPA741DRG4 | 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。