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參數(shù)資料
| 型號： | TAS5121A |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | DIGITAL AMPLIFIER POWER STAGE |
| 中文描述： | 數(shù)字放大器功率級 |
| 文件頁數(shù)： | 16/21頁 |
| 文件大?。?/td> | 405K |
| 代理商： | TAS5121A |
SLES094A - OCTOBER 2003 - REVISED MARCH 2004
www.ti.com
16
Thermal
Pad
8,20 mm
7,20 mm
3,90 mm
2,98 mm
CLICK AND POP REDUCTION
TI modulators feature a pop and click reduction system
that controls the timing when switching starts and stops.
Going from nonswitching to switching operation causes a
spectral energy burst to occur within the audio bandwidth,
which is heard in the speaker as an audible click, for
instance, after having asserted RESET LH during a
system start-up.
To make this system work properly, the following design
rules must be followed when using the TAS5112A back
end:
The relative timing between the PWM_AP/M_x
signals and their corresponding VALID_x signal
should not be skewed by inserting delays,
because this increases the audible amplitude
level of the click.
The output stage must start switching from a
fully discharged output filter capacitor. Because
the output stage prior to operation is in the
high-impedance state, this is done by having a
passive pulldown resistor on each speaker
output to GND (see
System Configuration Used
for Characterization
).
Other things that can affect the audible click level:
The spectrum of the click seems to follow the
speaker impedance vs. frequency curve—the
higher the impedance, the higher the click
energy.
Crossover filters used between woofer and
tweeter in a speaker can have high impedance
in the audio band, which should be avoided if
possible.
Another way to look at it is that the speaker impulse
response is a major contributor to how the click energy is
shaped in the audio band and how audible the click will be.
The following mode transitions feature click and pop
reduction.
STATE
CLICK AND
POP REDUCED
Normal(1)
→
Mute
→
Normal(1)
Error recovery
(ERRCVY)
→
Normal(1)
→
Hard Reset
→
Normal(1)
Yes
Mute
Yes
Normal(1)
→
Yes
Error recovery
Normal(1)
Yes
No
Hard Reset
(1)Normal = switching
Yes
REFERENCES
1.
TAS5000 Digital Audio PWM Processor
data
manual—TI (SLAS270)
2.
True Digital Audio Amplifier TAS5001 Digital Audio
PWM Processor
data sheet—TI (SLES009)
3.
True Digital Audio Amplifier TAS5010 Digital Audio
PWM Processor
data sheet—TI (SLAS328)
4.
True Digital Audio Amplifier TAS5012 Digital Audio
PWM Processor
data sheet—TI (SLES006)
5.
TAS5026
Processor
data manual—TI (SLES041)
Six-Channel
Digital
Audio
PWM
6.
TAS5036A Six-Channel Digital Audio PWM
Processor
data manual—TI (SLES061)
7.
TAS3103 Digital Audio Processor With 3D Effects
data manual—TI (SLES038)
8.
Digital Audio Measurements
application report—TI
(SLAA114)
9.
PowerPAD
technical brief—TI (SLMA002)
Thermally
Enhanced
Package
10.
System Design Considerations for True Digital
Audio Power Amplifiers
application report—TI
(SLAA117)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TAS5121DKD | 功能描述:音頻放大器 TAS5121 Digital Amp Power Stage 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 |
| TAS5121DKDE4 | 功能描述:音頻放大器 TAS5121 Digital Amp Power Stage 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 |
| TAS5121DKDR | 功能描述:音頻放大器 TAS5121 Digital Amp Power Stage 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 |
| TAS5121DKDRE4 | 功能描述:音頻放大器 TAS5121 Digital Amp Power Stage 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 |
| TAS5121I | 制造商:TI 制造商全稱:Texas Instruments 功能描述:DIGITAL AMPLIIFIER POWER STAGE |
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