TI TPA3110D2 15W立体声D类放大方案

TI 公司的TPA3110D2是无滤波器的15W立体声D类音频功率放大器,具有`扬声器保护,不需要昂贵的基于电感的输出滤波器,降低BOM成本大约50%,并具有增强的性能,1可Hz时在整个功率范围内THD+N小于1%,非常适用用在HDTV,媒体坞站,数字无线电和声柱.本文介绍了TPA3110D2的主要特性,方框图以及典型应用电路, 单端输入和BTL输出的立体声D类放大器电路,单端输入和PBTL输出的立体声D类放大器.同时还介绍了TPA3110D2 EVM 音频放大器评估板主要特性,详细电路图以及材料清单.

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主要特性和优势:

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


图1. TPA3110D2方框图

图2.TPA3110D2简化应用电路

图3.TPA3110D2单端输入和BTL输出的立体声D类放大器

图4.TPA3110D2单端输入和PBTL输出的立体声D类放大器

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 音频放大器评估板主要特性:

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 音频放大器评估板

TPA3110D2 EVM Specifications



图5.TPA3110D2 EVM 音频放大器评估板外形图

图6.TPA3110D2 EVM音频放大器评估板电路图

TPA3110D2 EVM材料清单(BOM):