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| 型號： | TAS5122DFDR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 37 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56 |
| 封裝： | POWERPAD, PLASTIC, TSSOP-56 |
| 文件頁數(shù)： | 11/22頁 |
| 文件大?。?/td> | 313K |
| 代理商： | TAS5122DFDR |
TAS5122
SLES088C AUGUST 2003 REVISED NOVEMBER 2003
www.ti.com
19
LAND PATTERN
PCB THERMAL
RESISTANCE
7
×13 vias (5×10 mm)
2.2
°C/W
5
×11 vias (4×8 mm)
3.6
°C/W
Thermal
Pad
8,20 mm
7,20 mm
3,90 mm
2,98 mm
Figure 15. Thermal Pad Dimensions for DFD and
DCA Packages
CLICK AND POP REDUCTION
TI modulators feature a pop and click reduction system
that controls the timing when switching starts and stops.
Going from non-switching 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 TAS5122 power
stage:
D 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.
D 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:
D The spectrum of the click seems to follow the
speaker impedance vs frequency curve—the
higher the impedance, the higher the click
energy.
D 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 is.
The following mode transitions feature click and pop
reduction in Texas Instruments PWM processors.
STATE
CLICK AND
POP REDUCED
Normal(1)
→ Mute
Yes
Mute
→ Normal(1)
Yes
Normal(1)
→
Error recovery
(ERRCVY)
Yes
Error recovery
→ Normal(1)
Yes
Normal(1)
→ Hard Reset
No
Hard Reset
→ Normal(1)
Yes
(1) Normal = switching
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
Six-Channel
Digital
Audio
PWM
Processor data manual – TI (SLES041)
6.
TAS5036A
Six-Channel
Digital
Audio
PWM
Processor data manual – TI (SLES061)
7.
TAS3103 Digital Audio Processor With 3D Effects
data manual – TI – TI (SLES038)
8.
Digital Audio Measurements application report – TI
(SLAA114)
9.
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 |
|---|---|
| TAS5122DFDRG4 | 功能描述:音頻放大器 Digital Amplifier 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 |
| TAS5132 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STEREO DIGITAL AMPLIFIER POWER STAGE |
| TAS5132_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STEREO DIGITAL AMPLIFIER POWER STAGE |
| TAS5132_0702 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STEREO DIGITAL AMPLIFIER POWER STAGE |
| TAS5132DDV | 功能描述:音頻放大器 Stereo 20W Pwrstage 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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