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| TAS5782M 30W立體聲D類(lèi)放大器方案 |
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| 文章來(lái)源： 更新時(shí)間：2017/7/17 10:14:00 |
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TI公司的TAS5782M是具有96kHz處理的30W立體聲閉環(huán)D類(lèi)放大器,具有靈活的音頻I/O配置,支持I2S,TDM,LJ,RJ數字輸入,支持3線(xiàn)數字音頻接口,1W 1kHz時(shí)的THD+N=0.2%, SNR=103dB,主要用在LCD, LED TV和多種用戶(hù)的監視器,條形音響,塢站和PC音頻,無(wú)線(xiàn)低音喇叭,藍牙揚聲器和有源揚聲器.本文介紹了TAS5782M主要特性,框圖和應用電路,以及評估板TAS5782MEVM主要特性,電路圖,材料清單和PCB元件裝配圖.
The TAS5782M device is a high-performance, stereoclosed-loop Class-D amplifier with integrated audioprocessor with up to 96-kHz architecture. To convertfrom digital to analog, the device uses a highperformance DAC with Burr Brown™ audiotechnology. It requires only two power supplies: oneDVDD for low-voltage circuitry and one PVDD for high-voltage circuitry. It is controlled by a softwarecontrol port using standard I2C communication.
An optimal mix of thermal performance and devicecost is provided in the 90 mΩrDS(on) of the outputMOSFETs. Additionally, a thermally enhanced 48-PinTSSOP provides excellent operation in the elevatedambient temperatures found in modern consumer electronic devices.
TAS5782M主要特性:
1• Flexible Audio I/O Configuration
– Supports I2S, TDM, LJ, RJ Digital Input
– Sample Rate Support
– BD Amplifier Modulation
– Supports 3-Wire Digital Audio Interface (NoMCLK required)
• High-Performance Closed-Loop Architecture(PVDD = 12 V, RSPK = 8 Ω, SPK_GAIN = 20 dB)
– Closed-Loop = reduced component count/smaller solution size
– Idle Channel Noise = 62 μVrms (A-Wtd)
– THD+N = 0.2% (at 1 W, 1 kHz)
– SNR = 103dB A-Wtd (Ref. to THD+N = 1%)
• Flexible Processing Features
– 15 BiQuads / SmartEQ
– 2 x 5 BiQuads for X-Over / EQ
– 3-Band Advanced DRC + AGL
– Dynamic EQ and SmartBass
– Sound Field Spatializer (SFS)
– 96-kHz Processor Sampling
• Communication Features
– Software Mode Control via I2C Port
– Two Address Select Pins – Up to 4 Devices
• Robustness and Reliability Features
– Clock Error, DC, and Short-Circuit Protection
– Overtemperature and Overcurrent Protection
TAS5782M應用:
• LCD, LED TV, and Multi-Purpose Monitors
• Sound Bars, Docking Stations, and PC Audio
• Wireless Subwoofers, Bluetooth Speakers, andActive Speakers
圖1.TAS5782M框圖
圖2.TAS5782M 2.0(立體BTL)系統應用電路圖
圖3.TAS5782M單聲道(PBTL)系統應用電路圖
圖4.TAS5782M 2.1(立體BTL+外部單聲道放大器)應用電路圖
評估板TAS5782MEVM
The TAS5782MEVM showcases the latest TI digital input class-D closed loop amplifier. The TAS5782M isan I2S or TDM input class-D amplifier with up to 96-kHz processing. The EVM is used in conjunction withthe PPCMB. The PVDD supply is provided via the TAS5782MEVM and is regulated to 5 VDC and 3.3VDC on the PPCMB. The PPCMB provides the I2S, I2C, and 3.3 VDC to the TAS5782MEVM.
The TAS5782MEVM is controlled by the PPCMB. The digital audio data input to the TAS5782MEVM issent from PPCMB and is selectable from USB audio, optical SPDIF, coaxial SPDIF, PSIA (external I2S),and analog ADC sources.
評估板TAS5782MEVM 所需設備和附件:
1. TAS5782MEVM
2. PurePath console motherboard
3. A USB micro type-B cable
4. Power supply unit (PSU) 9.5 – 26.4 VDC (2)
5. Speakers and cables
6. Desktop or laptop running Microsoft® Windows® 7, Windows 8, or Windows 8.1
7. Audio source: This can be a DVD player with appropriate SPDIF cable or playback media from Windows 7, Windows 8, or Windows 8.1
圖5.評估板TAS5782MEVM外形圖
評估板TAS5782MEVM主要特性:
• GUI control via USB port
• Stereo and mono channels with I2S input
• Processed and non-processed mono channel I2S input
• Operates in BTL or PBTL
圖6.PPCMB和TAS5782MEVM連接圖
圖7.評估板TAS5782MEVM電路圖(1)
圖8.評估板TAS5782MEVM電路圖(2)
圖9.評估板TAS5782MEVM電路圖(3)
評估板TAS5782MEVM材料清單:
圖10.評估板TAS5782MEVM頂層元件裝配圖
圖11.評估板TAS5782MEVM底層元件裝配圖 |
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