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| 型号： | TPA3005D2PHPRG4 |
| 厂商： | Texas Instruments |
| 文件页数： | 13/31页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 6W STER 48TQFP |
| 标准包装： | 1,000 |
| 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： | 带卷 (TR) |
| 配用： | 296-18924-ND - EVAL MODULE FOR TPA3005D2 |
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Analyzer
20 Hz 20 kHz
(a) Basic ClassAB
APA
Signal
Generator
Power Supply
Analyzer
20 Hz 20 kHz
R
L
(b) Filter-Free and Traditional Class-D
Class-D APA
Signal
Generator
Power Supply
R
L
Low-Pass RC
Filter
Low-Pass RC
Filter
(A)
(A) For efficiency measurements with filter-free class-D, RL should be an inductive load like a speaker.
SLOS427A – MAY 2004 – REVISED AUGUST 2010
www.ti.com
Figure 20. Audio Measurement Systems
The TPA3005D2 uses a modulation scheme that does not require an output filter for operation, but they do
sometimes require an RC low-pass filter when making measurements. This is because some analyzer inputs
cannot accurately process the rapidly changing square-wave output and therefore record an extremely high level
of distortion. The RC low-pass measurement filter is used to remove the modulated waveforms so the analyzer
can measure the output sine wave.
DIFFERENTIAL INPUT AND BTL OUTPUT
All of the class-D APAs and many class-AB APAs have differential inputs and bridge-tied load (BTL) outputs.
Differential inputs have two input pins per channel and amplify the difference in voltage between the pins.
Differential inputs reduce the common-mode noise and distortion of the input circuit. BTL is a term commonly
used in audio to describe differential outputs. BTL outputs have two output pins providing voltages that are 180
degrees out of phase. The load is connected between these pins. This has the added benefits of quadrupling the
output power to the load and eliminating a dc blocking capacitor.
A block diagram of the measurement circuit is shown in Figure 21. The differential input is a balanced input,
meaning the positive (+) and negative (-) pins have the same impedance to ground. Similarly, the BTL output
equates to a balanced output.
20
Copyright 2004–2010, Texas Instruments Incorporated
Product Folder Link(s): TPA3005D2
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| 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 |
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| 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 |
| TPA3007D1PW | 制造商:Texas Instruments 功能描述:IC AUDIO PWR AMP CLASS D 6.5 |
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