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参数资料
| 型号： | TPA6120A2DWPRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封装： | GREEN, PLASTIC, SOP-20 |
| 文件页数： | 9/25页 |
| 文件大小： | 611K |
| 代理商： | TPA6120A2DWPRG4 |
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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| TPA6120A2DWPR | 0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
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| TPA6120A2DWPG4 | 0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| TPA6130A2RTJR | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PQCC20 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA6120A2EVM | 功能描述:音频 IC 开发工具 TPA6120A2 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TPA6120A2RGYEVM | 功能描述:TPA6120A2 - Headphones, 2-Channel (Stereo) Output Class AB Audio Amplifier Evaluation Board 制造商:texas instruments 系列:- 零件状态:有效 放大器类型:AB 类 输出类型:耳机，2-通道（立体声） 不同负载时的最大输出功率 x 通道数:80mW x 2 @ 600 欧姆 电压 - 电源:10 V ~ 30 V，±5 V ~ 15 V 板类型:完全填充 使用的 IC/零件:TPA6120A2 所含物品:板 标准包装:1 |
| TPA6120A2RGYT | 功能描述:Amplifier IC Headphones, 2-Channel (Stereo) Class AB 14-VQFN (3.5x3.5) 制造商:texas instruments 系列:- 包装:剪切带（CT） 零件状态:有效 类型:AB 类 输出类型:耳机，2-通道（立体声） 不同负载时的最大输出功率 x 通道数:80mW x 2 @ 600 欧姆 电压 - 电源:10 V ~ 30 V，±5 V ~ 15 V 特性:差分输入，短路和热保护 安装类型:表面贴装 工作温度:-40°C ~ 85°C（TA） 供应商器件封装:14-VQFN（3.5x3.5） 封装/外壳:14-VFQFN 裸露焊盘 标准包装:1 |
| TPA6130A2 | 制造商:TI 制造商全称:Texas Instruments 功能描述:138-mW DIRECTPATH STEREO HEADPHONE AMPLIFIER WITH I2C VOLUME CONTROL |
| TPA6130A2_07 | 制造商:TI 制造商全称:Texas Instruments 功能描述:138-mW DIRECTPATH STEREO HEADPHONE AMPLIFIER WITH I2C VOLUME CONTROL |
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