參數(shù)資料
型號(hào)： TPA3005D2PHPG4
廠商： Texas Instruments
文件頁數(shù)： 11/31頁
文件大小： 0K
描述： IC AMP AUDIO PWR 6W STER 48TQFP
標(biāo)準(zhǔn)包裝： 250
類型： D 類
輸出類型： 2 通道（立體聲）
在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量： 6W x 2 @ 8 歐姆
電源電壓： 8.5 V ~ 18 V
特點(diǎn)： 差分輸入，短路保護(hù)和熱保護(hù)，關(guān)機(jī)
安裝類型： 表面貼裝
供應(yīng)商設(shè)備封裝： 48-HTQFP（7x7）
封裝/外殼： 48-TQFP 裸露焊盤
包裝： 托盤
配用： 296-18924-ND - EVAL MODULE FOR TPA3005D2
www.ti.com
SLOS427A – MAY 2004 – REVISED AUGUST 2010
BASIC MEASUREMENT SYSTEM
This application note focuses on methods that use the basic equipment listed below:
Audio analyzer or spectrum analyzer
Digital multimeter (DMM)
Oscilloscope
Twisted-pair wires
Signal generator
Power resistor(s)
Linear regulated power supply
Filter components
EVM or other complete audio circuit
Figure 20 shows the block diagrams of basic measurement systems for class-AB and class-D amplifiers. A sine
wave is normally used as the input signal because it consists of the fundamental frequency only (no other
harmonics are present). An analyzer is then connected to the APA output to measure the voltage output. The
analyzer must be capable of measuring the entire audio bandwidth. A regulated dc power supply is used to
reduce the noise and distortion injected into the APA through the power pins. A System Two audio measurement
system (AP-II) (Reference 1) by Audio Precision includes the signal generator and analyzer in one package.
The generator output and amplifier input must be ac-coupled. However, the EVMs already have the ac-coupling
capacitors, (CIN), so no additional coupling is required. The generator output impedance should be low to avoid
attenuating the test signal, and is important because the input resistance of APAs is not high. Conversely, the
analyzer-input impedance should be high. The output impedance, ROUT, of the APA is normally in the hundreds
of milliohms and can be ignored for all but the power-related calculations.
Figure 20(a) shows a class-AB amplifier system. They take an analog signal input and produce an analog signal
output. These amplifier circuits can be directly connected to the AP-II or other analyzer input.
This is not true of the class-D amplifier system shown in Figure 20(b), which requires low-pass filters in most
cases in order to measure the audio output waveforms. This is because it takes an analog input signal and
converts it into a pulse-width modulated (PWM) output signal that is not accurately processed by some
analyzers.
Copyright 2004–2010, Texas Instruments Incorporated
19
Product Folder Link(s): TPA3005D2
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TPA3005D2PHPR 功能描述:音頻放大器 Stereo Med Power Filter-Free Class-D 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
TPA3005D2PHPRG4 功能描述:音頻放大器 Stereo Med Power Filter-Free Class-D 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
TPA3007D1 制造商:TI 制造商全稱:Texas Instruments 功能描述:6.5-W MONO CLASS-D AUDIO POWER AMPLIFIER
TPA3007D1_06 制造商:TI 制造商全稱:Texas Instruments 功能描述:6.5-W MONO CLASS-D AUDIO POWER AMPLIFIER
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