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| 型号： | TPA3005D2PHPR |
| 厂商： | Texas Instruments |
| 文件页数： | 14/31页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 6W STER 48TQFP |
| 标准包装： | 1 |
| 类型： | D 类 |
| 输出类型： | 2 通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 6W x 2 @ 8 欧姆 |
| 电源电压： | 8.5 V ~ 18 V |
| 特点： | 差分输入，短路保护和热保护，关机 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 48-HTQFP（7x7） |
| 封装/外壳： | 48-TQFP 裸露焊盘 |
| 包装： | 标准包装 |
| 产品目录页面： | 877 (CN2011-ZH PDF) |
| 配用： | 296-18924-ND - EVAL MODULE FOR TPA3005D2 |
| 其它名称： | 296-17058-6 |
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C
IN
Audio Power
Amplifier
Generator
LowPass
RC Filter
C
IN
R
GEN
R
GEN
R
IN
R
IN
V
GEN
R
OUT
R
OUT
Analyzer
R
ANA
R
ANA
C
ANA
LowPass
RC Filter
R
L
C
ANA
Twisted-Pair Wire
Evaluation Module
Twisted-Pair Wire
www.ti.com
SLOS427A – MAY 2004 – REVISED AUGUST 2010
Figure 21. Differential Input, BTL Output Measurement Circuit
The generator should have balanced outputs and the signal should be balanced for best results. An unbalanced
output can be used, but it may create a ground loop that affects the measurement accuracy. The analyzer must
also have balanced inputs for the system to be fully balanced, thereby cancelling out any common mode noise in
the circuit and providing the most accurate measurement.
The following general rules should be followed when connecting to APAs with differential inputs and BTL outputs:
Use a balanced source to supply the input signal.
Use an analyzer with balanced inputs.
Use twisted-pair wire for all connections.
Use shielding when the system environment is noisy.
Ensure that the cables from the power supply to the APA, and from the APA to the load, can handle the large
currents (see Table 3).
Table 3 shows the recommended wire size for the power supply and load cables of the APA system. The real
concern is the dc or ac power loss that occurs as the current flows through the cable. These recommendations
are based on 12-inch long wire with a 20-kHz sine-wave signal at 25°C.
Table 3. Recommended Minimum Wire Size for Power Cables
DC POWER LOSS
AC POWER LOSS
POUT (W)
RL()
AWG Size
(MW)
10
4
18
22
16
40
18
42
2
4
18
22
3.2
8
3.7
8.5
1
8
22
28
2
8
2.1
8.1
< 0.75
8
22
28
1.5
6.1
1.6
6.2
CLASS-D RC LOW-PASS FILTER
An 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 22. 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.
Copyright 2004–2010, Texas Instruments Incorporated
21
Product Folder Link(s): TPA3005D2
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| TPA3005D2PHPRG4 | 功能描述:音频放大器 Stereo Med Power Filter-Free Class-D RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TPA3007D1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:6.5-W MONO CLASS-D AUDIO POWER AMPLIFIER |
| TPA3007D1_06 | 制造商:TI 制造商全称:Texas Instruments 功能描述:6.5-W MONO CLASS-D AUDIO POWER AMPLIFIER |
| TPA3007D1EVM | 功能描述:音频 IC 开发工具 TPA3007D1 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TPA3007D1PW | 功能描述:音频放大器 Mono Med Power Filter-Free Class-D RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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