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| TPA3251 高保真175W D類音頻放大器參考設(shè)計(jì) |
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| 文章來(lái)源： 更新時(shí)間：2016/6/4 11:56:00 |
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TI公司的TPA3251是數(shù)字輸入和處理的高保真175W D類放大器,采用高端反饋設(shè)計(jì)和有所有權(quán)的高速柵極驅(qū)動(dòng)誤差修正(PurePath™ Ultra-HD),具有超低音頻失真和優(yōu)越的音質(zhì).器件可對(duì)4-Ω負(fù)載提供2x175W,對(duì)3-Ω負(fù)載提供2x220W,D類放大器效率高達(dá)90%,主要用在藍(lán)光/DVD接收器,高端HTiB系統(tǒng),AV接收器,高端條形音響,迷你音響系統(tǒng),有源揚(yáng)聲器和低音喇叭.本文介紹了TPA3251主要特性,功能框圖,系統(tǒng)框圖,幾種應(yīng)用電路圖以及PurePath™ Ultra-HD評(píng)估板TPA3251D2EVM主要特性,電路圖,材料清單和PCB設(shè)計(jì)圖.
TPA3251 is a high performance class-D power amplifier that enables true premium sound quality with class-D efficiency. It features an advanced integrated feedback design and proprietary high-speed gate driver error correction (PurePath™ Ultra-HD). This technology allows ultra low distortion across the audio band and superior audio quality. The device can drive up to 2 x 175 W into 4-Ω load and 2 x 220 W into 3-Ω load and features a 2 VRMS analog input interface that works seamlessly with high performance DACs such as TI’s PCM5242. In addition to excellent audio performance, TPA3251 achieves both high power efficiency and very low power stage idle losses below 1 W. This is achieved through the use of 60 mΩ MOSFETs and an optimized gate driver scheme that achieves significantly lower idle losses than typical discrete implementations.
TPA3251主要特性:
Differential Analog Inputs
Total Output Power at 10%THD+N
175-W Stereo into 4 Ω in BTL Configuration
220-W Stereo into 3 Ω in BTL Configuration
350-W Mono into 2 Ω in PBTL Configuration
Total Output Power at 1%THD+N
140-W Stereo into 4 Ω in BTL Configuration
175-W Stereo into 3 Ω in BTL Configuration
285-W Mono into 2 Ω in PBTL Configuration
Advanced Integrated Feedback Design with High- speed Gate Driver Error Correction (PurePath Ultra-HD)
Signal Bandwidth up to 100 kHz for High Frequency Content From HD Sources
Ultra Low 0.005% THD+N at 1 W into 4 Ω and <0.01% THD+N to Clipping
60 dB PSRR (BTL, No Input Signal)
<60 µV (A-Weighted) Output Noise
>111 dB (A Weighted) SNR
Multiple Configurations Possible:
Stereo, Mono, 2.1 and 4xSE
Click and Pop Free Startup and Stop
90% Efficient Class-D Operation (4 Ω)
Wide 12-V to 36-V Supply Voltage Operation
Self-Protection Design (Including Undervoltage, Overtemperature, Clipping, and Short Circuit Protection) With Error Reporting
EMI Compliant When Used With Recommended System Design
TPA3251應(yīng)用:
Blu-ray Disk™/DVD Receivers
High End HTiB Systems
AV Receivers
High End Soundbar
Mini Combo Systems
Active Speakers and Subwoofers
圖1.TPA3251框圖
圖2.TPA3251系統(tǒng)框圖
圖3.TPA3251差分輸入BTL應(yīng)用電路圖
圖4.TPA3251單端(1N)SE應(yīng)用電路圖
圖5.TPA3251差分(2N)PBTL應(yīng)用電路圖
PurePath™ Ultra-HD評(píng)估板TPA3251D2EVMTIDA-00874
The TPA3251D2EVM PurePath™ Ultra-HD evaluation module demonstrates the TPA3251D2DDV integrated circuit from Texas Instruments. The TPA3251D2DDV is a high-performance class-D amplifier that enables true premium sound quality with high efficiency class-D technology. It features an advance integrated feedback design and high-speed gate driver error correction (PurePath™ Ultra-HD), which enables ultra-low distortion across the audio band and superior audio quality.
This EVM supports 2 BTL (stereo 2.0) output channels, 1 PBTL (mono 0.1) output channel, 1 BTL plus 2 SE (2.1) output channels, and 4 SE (4.0) output channels configurations. The NE5532 is a High Performance Audio Op Amp designed to allow TPA3251D2DDV operation with differential or single ended input signals to the EVM with differential inputs yielding the optimal performance. TPA3251D2EVM is a complete 2Vrms analog input 2 × 175 W stereo/1 x 350 W mono power amplifier ready for evaluation and excellent listening experience.
圖6.評(píng)估板TPA3251D2EVM外形圖
評(píng)估板TPA3251D2EVM主要特性:
Stereo PurePath™ Ultra-HD evaluation module
Self-contained protection system (short circuit, clip and thermal)
Standard 2VRMS differential input or single ended line input
BTL, PBTL and SE output configurations support
Double-sided, plated-through, 2oz. Cu 2 layer PCB layout
圖7.評(píng)估板TPA3251D2EVM電路圖(1)
圖8.評(píng)估板TPA3251D2EVM電路圖(2)
圖9.評(píng)估板TPA3251D2EVM電路圖(3)
圖10.評(píng)估板TPA3251D2EVM電路圖(4)
評(píng)估板TPA3251D2EVM材料清單(BOM):
圖11.評(píng)估板TPA3251D2EVM PCB設(shè)計(jì)圖(1)
圖12.評(píng)估板TPA3251D2EVM PCB設(shè)計(jì)圖(2)
圖13.評(píng)估板TPA3251D2EVM PCB設(shè)計(jì)圖(3)
圖14.評(píng)估板TPA3251D2EVM PCB設(shè)計(jì)圖(4)
圖15.評(píng)估板TPA3251D2EVM PCB設(shè)計(jì)圖(5)
圖16.評(píng)估板TPA3251D2EVM PCB設(shè)計(jì)圖(6)
圖17.評(píng)估板TPA3251D2EVM PCB設(shè)計(jì)圖(7)
圖18.評(píng)估板TPA3251D2EVM PCB設(shè)計(jì)圖(8)
圖19.評(píng)估板TPA3251D2EVM PCB設(shè)計(jì)圖(9)
圖20.評(píng)估板TPA3251D2EVM PCB設(shè)計(jì)圖(10)
圖21.評(píng)估板TPA3251D2EVM PCB設(shè)計(jì)圖(11) |
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