參數(shù)資料
型號(hào)： TPA3100D2IRGZRQ1
廠商： Texas Instruments
文件頁(yè)數(shù)： 9/38頁(yè)
文件大小： 0K
描述： IC AMP AUDIO PWR 21.8W D 48QFN
標(biāo)準(zhǔn)包裝： 1
類(lèi)型： D 類(lèi)
輸出類(lèi)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： 21.8W x 2 @ 8 歐姆
電源電壓： 10 V ~ 26 V
特點(diǎn)： 差分輸入，靜音，短路和熱保護(hù)，關(guān)機(jī)
安裝類(lèi)型： 表面貼裝
供應(yīng)商設(shè)備封裝： 48-VQFN 裸露焊盤(pán)（7x7）
封裝/外殼： 48-VFQFN 裸露焊盤(pán)
包裝： 標(biāo)準(zhǔn)包裝
配用： 296-21138-ND - EVALUATION MODULE FOR TPA3100D2
其它名稱： 296-24154-6
Class-D Operation
Traditional Class-D Modulation Scheme
0V
-12V
+12V
Current
OUTP
DifferentialVoltage
AcrossLoad
OUTN
TPA3100D2 Modulation Scheme
TPA3100D2-Q1
www.ti.com ......................................................................................................................................................................................... SLOS557 – SEPTEMBER 2008
This section focuses on the class-D operation of the TPA3100D2.
The traditional class-D modulation scheme, which is used in the TPA032D0x family, has a differential output in
which each output is 180° out of phase and changes from ground to the supply voltage, VCC. Therefore, the
differential prefiltered output varies between positive and negative VCC, where filtered 50% duty cycle yields 0 V
across the load. The traditional class-D modulation scheme with voltage and current waveforms is shown in
Figure 23. Note that even at an average of 0 V across the load (50% duty cycle), the current to the load is high,
causing high loss and, thus, causing a high supply current.
Figure 23. Traditional Class-D Modulation Scheme Output Voltage and Current Waveforms Into an
Inductive Load With No Input
The TPA3100D2 uses a modulation scheme that still has each output switching from 0 V to the supply voltage.
However, OUTP and OUTN are in phase with each other with no input. The duty cycle of OUTP is greater than
50% and OUTN is less than 50% for positive output voltages. The duty cycle of OUTP is less than 50% and
OUTN is greater than 50% for negative output voltages. The voltage across the load stays at 0 V throughout
most of the switching period, greatly reducing the switching current, which reduces I2R losses in the load.
Copyright 2008, Texas Instruments Incorporated
17
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參數(shù)描述
TPA3100D2PHP 功能描述:音頻放大器 20 W Stereo Class-D Audio Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TPA3100D2PHPG4 功能描述:音頻放大器 20 W Stereo Class-D Audio Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TPA3100D2PHPR 功能描述:音頻放大器 20 W Stereo Class-D Audio Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TPA3100D2PHPRG4 功能描述:音頻放大器 20 W Stereo Class-D Audio Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TPA3100D2-Q1 制造商:TI 制造商全稱:Texas Instruments 功能描述:20-W STEREO CLASS-D AUDIO POWER AMPLIFIER
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