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[原创] TI TAS5782M 30W立体声D类放大器方案

关键词:消费类电子 D类放大器 LCD LED TV 扬声器

时间:2017-07-14 10:24:33       作者:TI        来源:中电网

TI公司的TAS5782M是具有96kHz处理的30W立体声闭环D类放大器,具有灵活的音频I/O配置,支持I2S,TDM,LJ,RJ数字输入,支持3线数字音频接口,1W 1kHz时的THD+N=0.2%, SNR=103dB,主要用在LCD, LED TV和多种用户的监视器,条形音响,坞站和PC音频,无线低音喇叭,蓝牙扬声器有源扬声器.本文介绍了TAS5782M主要特性,框图和应用电路,以及评估板TAS5782MEVM主要特性,电路图,材料清单和PCB元件装配图.

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应用:

• LCD, LED TV, and Multi-Purpose Monitors
• Sound Bars, Docking Stations, and PC Audio
• Wireless Subwoofers, Bluetooth Speakers, andActive Speakers

图1.TAS5782M框图

图2.TAS5782M 2.0(立体BTL)系统应用电路图

图3.TAS5782M单声道(PBTL)系统应用电路图

图4.TAS5782M 2.1(立体BTL+外部单声道放大器)应用电路图

评估板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.

评估板TAS5782MEVM 所需设备和附件:

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

图5.评估板TAS5782MEVM外形图

评估板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

图6.PPCMB和TAS5782MEVM连接图

图7.评估板TAS5782MEVM电路图(1)

图8.评估板TAS5782MEVM电路图(2)

图9.评估板TAS5782MEVM电路图(3)
评估板TAS5782MEVM材料清单:



图10.评估板TAS5782MEVM顶层元件装配图

图11.评估板TAS5782MEVM底层元件装配图
详情请见:
http://www.ti.com/lit/ds/symlink/tas5782m.pdf
http://www.ti.com/lit/ug/slau708/slau708.pdf
tas5782m.pdf
slau708.pdf

 

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