參數(shù)資料
型號(hào)： TAS5112ADFDR
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
封裝： GREEN, PLASTIC, HTSSOP-56
文件頁(yè)數(shù)： 14/29頁(yè)
文件大小： 762K
代理商： TAS5112ADFDR
TAS5112A
SLES094B - OCTOBER 2003 - REVISED JUNE 2008
www.ti.com
21
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 17. Thermal Pad Dimensions for DCA
Package
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:
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 will be.
The following mode transitions feature click and pop
reduction.
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
相關(guān)PDF資料
PDF描述
TAS5112ADFDG4 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
TAS5112DFD 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
TAS5112DFDR 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
TAS5112DFDRG4 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
TAS5112DFDG4 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TAS5112ADFDRG4 功能描述:音頻放大器 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
TAS5112DFD 功能描述:音頻放大器 Dig Amp Stereo 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
TAS5112DFDG4 功能描述:音頻放大器 Dig Amp Stereo 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
TAS5112DFDR 功能描述:音頻放大器 Dig Amp Stereo 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
TAS5112DFDRG4 功能描述:音頻放大器 Dig Amp Stereo 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
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