TI 公司的TAS5630 是集成了反馈的模拟输入300W立体声(总功率600W)的D类放大器,能从单电源50V向4-8欧姆扬声器提供高达300W立体声,具有传统AB类放大器的性能(<0.03%THD)和D类放大器的电源效率.它的SNR大于100dB,PSRR为80dB,功率级的效率高达88%,主要用于Mini组合系统,AV接收器,DVD接收器和有源扬声器.本文介绍TAS5630主要特性,功能方框图, 典型系统方框图,几种应用电路以及TAS5630PHD2EVM评估板主要特性,详细电路图和材料清单(BOM).The TAS5630 is a high performance analog input Class D amplifierwith integrated closed loop feedback technology (known as PurePath™HD) with the ability to drive up to 300W Stereo into 4 to 8Speakers from a single 50V supply.PurePath™ HD technology enables traditional AB-Amplifierperformance (<0.03% THD) levels while providing the powerefficiency of traditional class D amplifiers.Unlike traditional Class D amplifiers, the distortion curve onlyincreases once the output levels move into clipping.PurePath™ HD technology enables lower idle losses making the deviceeven more efficient. Coupled with TI’s Class G power supplyreference design for TAS563x, industry leading levels of efficiencycan be achieved.TAS5630主要特性:PurePath™ HD Enabled IntegratedFeedback Provides: Signal Bandwidth up to 80kHz for High Frequency Content From HDSources Ultralow 0.03% THD at 1W into 4 Flat THD at all Frequencies for Natural Sound 80dB PSRR (BTL, No Input Signal) >100dB (A weighted) SNR Click and Pop Free Startup Multiple Configurations Possible on the Same PCB With StuffingOptions: Mono Parallel Bridge Tied Load (PBTL) Stereo Bridge Tied Load (BTL) 2.1 Single Ended Stereo Pair and Bridge Tied Load Subwoofer Quad Single Ended Outputs Total Output Power at 10%THD+N 600W in Mono PBTL Configuration 300W per Channel in Stereo BTL Configuration 145W per Channel in Quad Single Ended Configuration High Efficiency Power Stage (>88%) With 60-m Output MOSFETs Two Thermally Enhanced Package Options: PHD (64-Pin QFP) DKD (44-Pin PSOP3)TAS5630应用:• Mini Combo System23• AV Receivers• DVD Receivers• Active Speakers图1.TAS5630功能方框图图2.TAS5630典型系统方框图图3.TAS5630带BD调制滤波器的差分输入BTL应用电路图图4.TAS5630带BD调制滤波器的差分输入(2N)PBTL应用电路图图5.TAS5630典型SE应用电路图图6.TAS5630 2.1系统差分输入BTL和不平衡输入SE应用电路图图7.TAS5630带BD调制滤波器DKD封装的差分输入BTL应用电路图TAS5630PHD2EVM评估板The TAS5630PHD is ahigh-performance, integrated Stereo Feedback Analog-Input DigitalAmplifier Power Stage designed to drive 4Ω speakers at up to 300Wper channel. This amplifier requires only a simple passivedemodulation filter to deliver high-quality, high-efficiency audioamplification.This EVM is configured with 2 BTL channels and the possibility toapply either a single ended or a differential analog input signal.It is also possible to configure the two BTL channels into oneparallel BTL (PBTL) channel.The OPA1632 is a High Performance Fully Differential Audio Op Ampdesigned to allow operation with single ended or differential inputsignals to the EVM.This EVM is a complete stereo analog input 2 × 300 W poweramplifier ready for evaluation and great music.TAS5630PHD2EVM 指标:图8.TAS5630PHD2EVM评估板外形图图9.TAS5630PHD2EVM评估板电路图(1)图10.TAS5630PHD2EVM评估板电路图(2)TAS5630PHD2EVM材料清单:
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