TI 公司的TPA2016D2 是立體聲無濾波器的D類音頻功率放大器,帶有音量控制,動態(tài)范圍壓縮(DRC)和自動增益控制(AGC),5V工作時每路能向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,廣泛應用在無線手機和PDA,手提導航設(shè)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
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