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EEPW首頁(yè) > 模擬技術(shù) > 設計應用 > 基于TPA2015設計的高效D類(lèi)音頻功率放大技術(shù)

基于TPA2015設計的高效D類(lèi)音頻功率放大技術(shù)

作者: 時(shí)間:2011-04-29 來(lái)源:網(wǎng)絡(luò ) 收藏

本文介紹了TPA2015主要特性,功能方框圖,性能測試框圖以及差分和單端輸入典型應用方框圖,評估板TPA2015D1主要指標,電路圖和材料清單。

TPA2015是TI公司的高效D類(lèi)音頻功率,采用電池跟蹤SpeakerGuard AGC技術(shù),并集成了自適應的升壓轉換器,能增加低輸出功率的效率。3.6V電源時(shí)TPA2015能向8歐姆揚聲器提供2W功率,THD為6%,效率85%。工作電壓2.5V-5.2V,帶自動(dòng)恢復的熱和短路保護,有三種增益設定:6 dB, 15.5 dB和20 dB,主要用在手機,PDA,GPS,手提電子學(xué)和揚聲器。

The TPA2015D1 is a high efficiency Class-D audio power amplifier with battery-tracking SpeakerGuard AGC technology and an integrated adaptive boost converter that enhances efficiency at low output power. It drives up to 2W into an 8 speaker (6% THD). With 85% typical efficiency, the TPA2015D1 helps extend battery life when playing audio.

The built-in boost converter generates a 5.5V supply voltage for the Class-D amplifier. This provides a louder audio output than a stand-alone amplifier directly connected to the battery. The SpeakerGuardTM AGC adjusts the Class-D gain to limit battery current and prevent heavy clipping.

The TPA2015D1 has an integrated low-pass filter to improve the RF rejection and reduce DAC out-of-band noise, increasing the signal to noise ratio (SNR).

TPA2015主要特性:

Built-In SpeakerGuard? Automatic Gain Control (AGC)

with Enhanced Battery Tracking

Limits Battery Current Consumption

Prevents Audio Clipping

2 W into 8 Load From 3.6 V Supply (6% THD)

Integrated Adaptive Boost Converter

Increases Efficiency at Low Output Power

Low Quiescent Current of 1.7 mA from 3.6 V

Operates From 2.5 V to 5.2 V

Thermal and Short-Circuit Protection with Auto Recovery

Three Gain Settings: 6 dB, 15.5 dB, and 20 dB

Independent Control for Boost and Class-D

Pin-to-Pin Compatible with TPA2013D1

Available in 1.954 mm × 1.954 mm 16-ball WCSP Package

TPA2015應用:

Cell Phones, PDA, GPS

Portable Electronics and Speakers

圖1。TPA2015功能方框圖

圖2。TPA2015測試框圖

圖3。TPA2015差分輸入典型應用方框圖

圖4。TPA2015單端輸入典型應用方框圖

圖5。TPA2015采用外接輸入濾波器降低DAC帶外噪音

音頻功率評估板TPA2015D1

The TPA2015D1 audio power amplifier evaluation module is a complete, stand-alone audio board. It contains the TPA2015D1 WCSP (YZH) Class-D audio power amplifier with an integrated boost converter. All components and the evaluation module are Pb-Free.

評估板TPA2015D1指標:


圖6。評估板TPA2015D1 EVM電路圖
評估板TPA2015D1 EVM材清單(BOM):



圖7。評估板TPA2015D1 PCB布局圖



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