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參數(shù)資料
| 型號： | TPA4411MRTJ |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 80-mW DIRECTPATH STEREO HEADPHONE DRIVER |
| 中文描述： | 80毫瓦DIRECTPATH立體聲耳機(jī)驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 19/33頁 |
| 文件大?。?/td> | 1025K |
| 代理商： | TPA4411MRTJ |
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www.ti.com
100
90
80
70
60
50
40
30
20
10
0
10
100
1 k
10 k
100 k
k
f Frequency Hz
V
DD
R
= 3.6 V,
,
C = 1
μ
F
100
90
80
70
60
50
40
30
20
10
0
10
100
1 k
10 k
100 k
k
1.8 V
3 V
4.5 V
R
L
= 32
C = 2.2
μ
F
f Frequency Hz
3.6 V
Decoupling Capacitors
The TPA4411 and TPA4411M are DirectPath headphone amplifiers that require adequate power supply
decoupling
to
ensure
that
the
noise
and
total
equivalent-series-resistance (ESR) ceramic capacitor, typically 2.2 μF, placed as close as possible to the device
V
DD
lead works best. Placing this decoupling capacitor close to the TPA4411 or TPA4411M is important for the
performance of the amplifier. For filtering lower frequency noise signals, a 10-μF or greater capacitor placed
near the audio power amplifier would also help, but it is not required in most applications because of the high
PSRR of this device.
Supply Voltage Limiting At 4.5 V
The TPA4411 and TPA4411M have a built-in charge pump which serves to generate a negative rail for the
headphone amplifier. Because the headphone amplifier operates from a positive voltage and negative voltage
supply, circuitry has been implemented to protect the devices in the amplifier from an overvoltage condition.
Once the supply is above 4.5 V, the TPA4411 and TPA4411M can shut down in an overvoltage protection mode
to prevent damage to the device. The TPA4411 and TPA4411M resume normal operation once the supply is
reduced to 4.5 V or lower.
Layout Recommendations
Exposed Pad On TPA4411RTJ and TPA4411MRTJ Package Option
TPA4411RTJ and TPA441MRTJ PowerPAD Sizes
Both the TPA4411 and TPA4411M are available in a 4 mm
×
4mm QFN. The exposed pad on the bottom of the
package is sized differently between the two devices. The TPA4411RTJ PowerPAD is larger than the
TPA4411MRTJ PowerPAD. Please see the layout and mechanical drawings at the end of the datasheet for
proper sizing.
TPA4411
TPA4411M
SLOS430C–AUGUST 2004–REVISED DECEMBER 2006
APPLICATION INFORMATION (continued)
SUPPLY VOLTAGE
REJECTION RATIO
vs
FREQUENCY
SUPPLY VOLTAGE
REJECTION RATIO
vs
FREQUENCY
Figure 74.
Figure 75.
harmonic
distortion
(THD)
are
low.
A
good
low
The exposed metal pad on the TPA4411RTJ and TPA4411MRTJ packages must be soldered down to a pad on
the PCB in order to maintain reliability.
The pad on the PCB should be allowed to float and not be connected to
ground or power
. Connecting this pad to power or ground prevents the device from working properly because it
is connected internally to PVSS.
19
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA4411MRTJR | 功能描述:音頻放大器 80mW Cap-free Stereo Headphone 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 |
| TPA4411MRTJRG4 | 功能描述:音頻放大器 80mW Cap-free Stereo Headphone 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 |
| TPA4411MRTJT | 功能描述:音頻放大器 80mW Cap-free Stereo Headphone 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 |
| TPA4411MRTJT | 制造商:Texas Instruments 功能描述:Audio Power Amplifier IC 制造商:Texas Instruments 功能描述:IC, AUDIO PWR AMP, CLASS AB, 80mW QFN-20 |
| TPA4411MRTJTG4 | 功能描述:音頻放大器 80mW Cap-free Stereo Headphone 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 |
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