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參數(shù)資料
| 型號： | TPA6120A2DWP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封裝： | GREEN, PLASTIC, SOP-20 |
| 文件頁數(shù)： | 9/25頁 |
| 文件大小： | 611K |
| 代理商： | TPA6120A2DWP |
www.ti.com
+
RI
RO
RL
VI
Too Long
TPA6120A2
RF
+
RI
RO
RL
VI
TPA6120A2
Ground as Close to
the Pin as Possible
Short Trace
Before Resistors
RF
Minimized Length of
the Trace Between
Output Node and RO
Minimized Length of
Feedback Path
Thermal Considerations
Efficiency of an amplifier +
P
L
P
SUP
(1)
P
L +
V
LRMS
2
R
L
, and V
LRMS +
V
P
2
, therefore, P
L +
V
P
2
2R
L
per channel
(2)
P
SUP + VCC ICCavg ) VCC ICC(q)
(3)
I
CCavg +
1
p
2
0
V
P
R
L
sin(t) dt + *
V
P
p
R
L
[cos(t)]
p
2
0
+
V
P
p
R
L
(4)
TPA6120A2
SLOS431 – MARCH 2004
APPLICATION INFORMATION (continued)
Despite the removal of the ground plane in critical areas, stray capacitance can still make its way onto the
sensitive outputs and inputs. Place components as close as possible to the pins and reduce trace lengths. See
Figure 33 and Figure 34. It is important for the feedback resistor to be extremely close to the pins, as well as the
series output resistor. The input resistor should also be placed close to the pin. If the amplifier is to be driven in a
noninverting configuration, ground the input close to the device so the current has a short, straight path to the
PowerPAD (gnd).
Figure 33. Layout That Can Cause Oscillation
Figure 34. Layout Designed To Reduce Capacitance On Critical Nodes
Amplifiers can generate quite a bit of heat. Linear amplifiers, as opposed to Class-D amplifiers, are extremely
inefficient, and heat dissipation can be a problem. There is no one to one relationship between output power and
heat dissipation, so the following equations must be used:
Where
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA6120A2DWP | 制造商:Texas Instruments 功能描述:SEMICONDUCTOR 制造商:Texas Instruments 功能描述:IC, AUDIO POWER AMPLIFIER, 80mW, SO-20 |
| TPA6120A2DWPG4 | 功能描述:音頻放大器 High Fidelity Stereo Headphone Drv 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6120A2DWPR | 功能描述:音頻放大器 High Fidelity Stereo Headphone Drv 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6120A2DWPRG4 | 功能描述:音頻放大器 Hi Fidelity St Head phone Driver 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6120A2EVM | 功能描述:音頻 IC 開發(fā)工具 TPA6120A2 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 |
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