TI 公司的TPA2016D2 是立體聲無(wú)濾波器的D類(lèi)音頻功率放大器,帶有音量控制,動(dòng)態(tài)范圍壓縮(DRC)和自動(dòng)增益控制(AGC),5V工作時(shí)每路能向8歐姆負載1.7W的功率.器件具有獨立的軟件關(guān)斷特性,并提供熱保護和短路保護,廣泛應用在無(wú)線(xiàn)手機和PDA,手提導航設備,手提DVD播放器,筆記本電腦,收音機,游戲機以及智力玩具等.本文介紹了TPA2016D2的主要特性,功能方框圖和應用電路以及TPA2016D2EVM評估板電路圖和所用元件列表.

       The TPA2016D2 is a stereo, filter-free Class-D audio power amplifier with volume control, dynamic range compression (DRC) and automatic gain control (AGC). It is available in a 2.2 mm x 2.2 mm WCSP package.

       The DRC/AGC function in the TPA2016D2 is programmable via a digital I2C interface. The DRC/AGC function can be configured to automatically prevent distortion of the audio signal and enhance quiet passages that are normally not heard. The DRC/AGC can also be configured to protect the speaker from damage at high power levels and compress the dynamic range of music to fit within the dynamic range of the speaker. The gain can be selected from -28 dB to +30 dB in 1-dB steps. The TPA2016D2 is capable of driving 1.7 W/Ch at 5 V or 750 mW/Ch at 3.6 V into 8 Ω load. The device features independent software shutdown controls for each channel and also provides thermal and short circuit protection.

                                                圖1. TPA2016D2外形圖

      TPA2016D2 主要特性:

      Filter-Free Class-D Architecture 
      1.7 W/Ch Into 8 Ω at 5 V (10% THD+N) 
      750 mW/Ch Into 8 Ω at 3.6 V (10% THD+N) 
      Power Supply Range: 2.5 V to 5.5 V 
      Flexible Operation With/Without I2C 
      Programmable DRC/AGC Parameters 
      Digital I2C Volume Control 
      Selectable Gain from -28 dB to 30 dB in 1-dB Steps (when compression is used) 
      Selectable Attack, Release and Hold Times 
      4 Selectable Compression Ratios 
      Low Supply Current: 3.5 mA 
      Low Shutdown Current: 0.2 µA 
      High PSRR: 80 dB 
      Fast Start-up Time: 5 ms 
      AGC Enable/Disable Function 
      Limiter Enable/Disable Function 
      Short-Circuit and Thermal Protection 
      Space-Saving Package 2,2 mm × 2,2 mm Nano-Free WCSP (YZH)

      應用范圍: 
      Wireless or Cellular Handsets and PDAs 
      Portable Navigation Devices 
      Portable DVD Player 
      Notebook PCs 
      Portable Radio 
      Portable Games 
      Educational Toys 
      USB Speakers

圖2. TPA2016D2功能方框圖



圖3. TPA2016D2簡(jiǎn)化應用電路

        The TPA2016D2 evaluation module (EVM) is a complete, stand-alone audio board. It contains the TPA2016D2 WCSP (YZH) Class-D audio power amplifier.

                                             圖4. TPA2016D2EVM評估板電路圖

                                      圖5.TPA2016D2EVM評估板PCB布層圖

表1. TPA2016D2EVM評估板元件列表