TI 公司的TPA3110D2是無(wú)濾波器的15W立體聲D類音頻功率放大器,具有`揚(yáng)聲器保護(hù),不需要昂貴的基于電感的輸出濾波器,降低BOM成本大約50%,并具有增強(qiáng)的性能,1可Hz時(shí)在整個(gè)功率范圍內(nèi)THD+N小于1%,非常適用用在HDTV,媒體塢站,數(shù)字無(wú)線電和聲柱.本文介紹了TPA3110D2的主要特性,方框圖以及典型應(yīng)用電路, 單端輸入和BTL輸出的立體聲D類放大器電路,單端輸入和PBTL輸出的立體聲D類放大器.同時(shí)還介紹了TPA3110D2 EVM 音頻放大器評(píng)估板主要特性,詳細(xì)電路圖以及材料清單.
15-W FILTER-FREE STEREO CLASS-D AUDIO POWER AMPLIFIER with
SPEAKERGUARD™
The TPA3110D2 filter-free Class-D amplifier’s advanced EMI suppression technology eliminates the need for costly inductor-based output filters, reducing BOM cost by as much as 50 percent. The TPA3110D2 also features enhanced performance, making it an excellent choice for consumer audio applications, including HDTVs, media docking stations, digital radios and sound bars.
Discover what the TPA3110D2 and associated family of true filter-free Class-D amplifiers can do for your next application! Use the table below to select a device then get datasheets, samples and evaluation modules to refine your decision.
TPA3110D2主要特性和優(yōu)勢(shì):
Filter-free advanced EMI suppression technology reduces bill of materials costs by as much as 50 percent, yet meets EMC performance specifications. Costly inductor-based output filters are replaced with low-cost ferrite bead filters, reducing board space
SpeakerGuardTM technology includes an adjustable power limiter and DC protection circuitry on the audio inputs, preventing speakers from being overdriven or damaged by DC currents due to board component failure or defects on the audio input circuitry
Ultra-low THD+N performance of < 0.1% THD+N over full power range at 1 kHz and advanced click-and-pop suppression circuitry enables outstanding audio performance and fidelity
Flow-through pin-out facilitates hassle-free layout and optimizes thermal performance with high-voltage pins on one side and input and control pins on the other
Differential inputs enable excellent common mode noise rejection and high-fidelity audio
Pin-to-pin compatible with the TPA3111D1 (10W mono), TPA3112D1 (25W mono) and TPA3113D2 (6W stereo)audio
圖1. TPA3110D2方框圖
圖2.TPA3110D2簡(jiǎn)化應(yīng)用電路
圖3.TPA3110D2單端輸入和BTL輸出的立體聲D類放大器
圖4.TPA3110D2單端輸入和PBTL輸出的立體聲D類放大器
The TPA3110D2 evaluation module consists of a single 15-W, Class-D, stereo audio power amplifier complete with a small number of external components mounted on a circuit board that can be used to directly drive a speaker with an external analog audio source as the input. The EVM’s default output filter configuration supports filter-free operation, but can easily be configured to support LC filter operation. The EVM can also be configured as a 30-W, Class-D mono audio power amplifier.
Designers can quickly evaluate the sound quality and verify specifications in their application with the TPA3110D2EVM. In addition, the TPA3110D2EVM Users Guide contains the schematic, layout and bill of materials for a reference design.
TPA3110D2 EVM 音頻放大器評(píng)估板主要特性:
Efficient Class-D Operation
Support for Filter-Free Operation
SpeakerGuardTM Speaker Protection circuitry
Four Selectable, Fixed Gain Settings
Wide Operating Voltage: 8 V - 26 V
Thermal and Short Circuit Protection with Auto Recovery Feature
TPA3110D2 EVM 音頻放大器評(píng)估板
TPA3110D2 EVM Specifications
圖5.TPA3110D2 EVM 音頻放大器評(píng)估板外形圖
圖6.TPA3110D2 EVM音頻放大器評(píng)估板電路圖
TPA3110D2 EVM材料清單(BOM):
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