[原创] TI TPA3128D2低功耗2x30W D类放大器解决方案

TI公司的TPA3128D2是低功耗2x30W D类数字放大器,具有立体声效果,PBTL模式能驱动高达60 W/ 2 Ω的扬声器,工作电压4.5 V 到26 V,效率高达90%,不需要散热片,主要用在蓝牙/无线扬声器,条形音响,LCD/LED TV,家庭影院等.本文介绍了TPA3128D2主要特性,功能框图,应用电路,以及评估模块TPA3128D2 EVM主要指标,应用连接图,电路图,材料清单和PCB设计图.

The TPA3128D2 devices are stereo efficient, digitalamplifier power stage for driving speakers up to 60 W/ 2 Ω in PBTL mode. The TPA3128D2 has low idlepower loss and helps to extend the battery life ofBluetooth/Wireless speakers and other batterypowered

audio systems. The high efficiency of theTPA3128D2 device allows it to do 2 × 30 W withoutexternal heat sink on a dual layer PCB. This deviceproposed an efficiency boost Mode, which candynamically reduced the current ripple of the externalLC filter and the idle current .

The TPA3128D2 advanced oscillator/PLL circuitemploys a multiple switching frequency option toavoid AM interferences, which is achieved togetherwith an option of either master or slave option,making it possible to synchronize multiple devices.

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