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參數資料
| 型號： | TPA3003D2PFBG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PQFP48 |
| 封裝： | GREEN, PLASTIC, TQFP-48 |
| 文件頁數： | 22/36頁 |
| 文件大?。?/td> | 755K |
| 代理商： | TPA3003D2PFBG4 |
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TPA3003D2
SLOS406A FEBRUARY 2003 REVISED MARCH 2003
29
www.ti.com
APPLICATION INFORMATION
Table 2. Recommended Minimum Wire Size for Power Cables
POUT
(W)
RL
(
)
AWG SIZE
DC POWER LOSS
(mW)
AC POWER LOSS
(mW)
1
8
22 to 28
2.0
8.0
2.1
8.1
< 0.75
8
22 to 28
1.5
6.1
1.6
6.2
Class-D RC low-pass filter
A RC filter is used to reduce the square-wave output when the analyzer inputs cannot process the pulse-width
modulated class-D output waveform. This filter has little effect on the measurement accuracy because the cutoff
frequency is set above the audio band. The high frequency of the square wave has negligible impact on
measurement accuracy because it is well above the audible frequency range and the speaker cone cannot
respond at such a fast rate. The RC filter is not required when an LC low-pass filter is used, such as with the
class-D APAs that employ the traditional modulation scheme (TPA032D0x, TPA005Dxx).
The component values of the RC filter are selected using the equivalent output circuit as shown in Figure 31.
RL is the load impedance that the APA is driving for the test. The analyzer input impedance specifications should
be available and substituted for RANA and CANA. The filter components, RFILT and CFILT, can then be derived
for the system. The filter should be grounded to the APA near the output ground pins or at the power supply
ground pin to minimize ground loops.
R
FILT
R
L
R
FILT
C
FILT
V
L= VIN
V
OUT
R
ANA
C
ANA
R
ANA
C
ANA
C
FILT
To APA
GND
AP Analyzer Input
RC LowPass Filters
Load
Figure 31. Measurement Low-Pass Filter Derivation Circuit—Class-D APAs
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA3003D2PFBR | 功能描述:音頻放大器 Ster Lo-Pwr Wide Sply Vltg Class-D RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA3003D2PFBRG4 | 功能描述:音頻放大器 Ster Lo-Pwr Wide Sply Vltg Class-D RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA3004 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:12-W STEREO CLASS-D AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL |
| TPA3004D2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:12-W STEREO CLASS-D AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL |
| TPA3004D2_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:12-W STEREO CLASS-D AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL |
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