TI 公司的TAS5630 是集成了反饋的模擬輸入300W立體聲(總功率600W)的D類放大器,能從單電源50V向4-8歐姆揚聲器提供高達300W立體聲,具有傳統AB類放大器的性能(<0.03% THD)和D類放大器的電源效率.它的SNR大于100dB,PSRR為80dB,功率級的效率高達88%,主要用于Mini組合系統,AV接收器,DVD接收器和有源揚聲器.本文介紹TAS5630主要特性, 功能方框圖, 典型系統方框圖,幾種應用電路以及TAS5630PHD2EVM評估板主要特性,詳細電路圖和材料清單(BOM).
The TAS5630 is a high performance analog input Class D amplifier with integrated closed loop feedback technology (known as PurePath™ HD) with the ability to drive up to 300W Stereo into 4 to 8  Speakers from a single 50V supply.
PurePath™ HD technology enables traditional AB-Amplifier performance (<0.03% THD) levels while providing the power efficiency of traditional class D amplifiers.
Unlike traditional Class D amplifiers, the distortion curve only increases once the output levels move into clipping.
PurePath™ HD technology enables lower idle losses making the device even more efficient. Coupled with TI’s Class G power supply reference design for TAS563x, industry leading levels of efficiency can be achieved.
TAS5630主要特性:
PurePath™ HD Enabled Integrated Feedback Provides:
Signal Bandwidth up to 80kHz for High Frequency Content From HD Sources
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 Stuffing Options:
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應用:
• Mini Combo System
23• AV Receivers
• DVD Receivers
• Active Speakers
圖1.TAS5630功能方框圖
圖2.TAS5630典型系統方框圖
圖3.TAS5630帶BD調制濾波器的差分輸入BTL應用電路圖
圖4.TAS5630帶BD調制濾波器的差分輸入(2N)PBTL應用電路圖
圖5.TAS5630典型SE應用電路圖
圖6.TAS5630 2.1系統差分輸入BTL和不平衡輸入SE應用電路圖
圖7.TAS5630帶BD調制濾波器DKD封裝的差分輸入BTL應用電路圖
TAS5630PHD2EVM評估板
The TAS5630PHD is a high-performance, integrated Stereo Feedback Analog-Input Digital Amplifier Power Stage designed to drive 4Ω speakers at up to 300W per channel. This amplifier requires only a simple passive demodulation filter to deliver high-quality, high-efficiency audio amplification.
This EVM is configured with 2 BTL channels and the possibility to apply either a single ended or a differential analog input signal. It is also possible to configure the two BTL channels into one parallel BTL (PBTL) channel.
The OPA1632 is a High Performance Fully Differential Audio Op Amp designed to allow operation with single ended or differential input signals to the EVM.
This EVM is a complete stereo analog input 2 × 300 W power amplifier ready for evaluation and great music.
TAS5630PHD2EVM 指標:
圖8.TAS5630PHD2EVM評估板外形圖
圖9.TAS5630PHD2EVM評估板電路圖(1)
圖10.TAS5630PHD2EVM評估板電路圖(2)
TAS5630PHD2EVM材料清單:
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