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參數資料
型號: TPA6211A1DRBG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 音頻/視頻放大
英文描述: 2.45 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
封裝: 3 X 3 MM, GREEN, PLASTIC, SON-8
文件頁數: 11/32頁
文件大小: 916K
代理商: TPA6211A1DRBG4
Efficiency of a BTL amplifier +
P
L
P
SUP
Where:
P
L +
V
L
rms2
R
L
, and V
LRMS +
V
P
2
, therefore, P
L +
V
P
2
2R
L
PL = Power delivered to load
PSUP = Power drawn from power supply
VLRMS = RMS voltage on BTL load
RL = Load resistance
VP = Peak voltage on BTL load
IDDavg = Average current drawn from the power supply
VDD = Power supply voltage
ηBTL = Efficiency of a BTL amplifier
and PSUP + VDD IDDavg and IDDavg +
1
p
0
V
P
R
L
sin(t) dt
+ *
1
p
V
P
R
L
[cos(t)]
p
0 +
2V
P
p
R
L
Therefore,
P
SUP +
2 V
DD
V
P
p
R
L
substituting PL and PSUP into equation 6,
Efficiency of a BTL amplifier +
V
P
2
2 R
L
2 V
DD VP
p
R
L
+
p
V
P
4 V
DD
V
P +
2 P
L
R
L
Where:
hBTL +
p
2 P
L
R
L
4 V
DD
Therefore,
(15)
www.ti.com........................................................................................................................................................ SLOS367C – AUGUST 2003 – REVISED JUNE 2008
(14)
Table 2. Efficiency and Maximum Ambient Temperature vs Output Power
Output Power
Efficiency
Internal Dissipation
Power From Supply
Max Ambient Temperature (1)
(W)
(%)
(W)
(°C)
5-V, 3-
Systems
0.5
27.2
1.34
1.84
85(2)
1
38.4
1.60
2.60
76
2.45
60.2
1.62
4.07
75
3.1
67.7
1.48
4.58
82
5-V, 4-
BTL Systems
0.5
31.4
1.09
1.59
85(2)
1
44.4
1.25
2.25
85(2)
2
62.8
1.18
3.18
85(2)
2.8
74.3
0.97
3.77
85(2)
5-V, 8-
Systems
0.5
44.4
0.625
1.13
85(2)
1
62.8
0.592
1.60
85(2)
1.36
73.3
0.496
1.86
85(2)
1.7
81.9
0.375
2.08
85(2)
(1)
DRB package
(2)
Package limited to 85°C ambient
Copyright 2003–2008, Texas Instruments Incorporated
19
Product Folder Link(s): TPA6211A1
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相關代理商/技術參數
參數描述
TPA6211A1DRBR 功能描述:音頻放大器 Mono Fully Diff Class-AB 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
TPA6211A1DRBR 制造商:Texas Instruments 功能描述:IC AUDIO PWR AMP CLASS AB 3.1W
TPA6211A1DRBRG4 功能描述:音頻放大器 Mono Fully Diff Class-AB 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
TPA6211A1EVM 功能描述:音頻 IC 開發工具 TPA6211A1 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
TPA6211A1-Q1 制造商:TI 制造商全稱:Texas Instruments 功能描述:3.1-W MONO FULLY DIFFERENTIAL AUDIO POWER AMPLIFIER
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