TI TAS2560低功耗高性能5.6W D类音频放大器解决方案

TI公司的TAS2560是低功耗高性能数字输入D类音频放大器,4.2V电源1% THD+N时能向4欧姆负载提供5.6W,输入取样频率8 kHz 到96 kHz,内置自动增益控制(AGC),主要用在手机,平板电脑,个人电子学,建筑物/家庭自动化,蓝牙扬声器和附件.本文介绍了TAS2560主要特性,框图,立体声配置图和典型应用电路,以及5.6W D类音频放大器模块TAS2560 EVM主要特性,电路图,材料清单和PCB设计图.
The TAS2560 is a low-power, high-performance,digital input, boosted Class-D Audio amplifier that canbe easily implemented in both mono and stereo (x2)applications. The device features an ultra low-noiseaudio DAC and Class-D power amplifier whichincorporates speaker voltage and current sensingfeedback for use with speaker protection algorithms.
A Class-H boost converter generates the Class-Damplifier supply rail. When the audio signal requiresonly a lower Class-D output power, system　efficiencyis improved by deactivating the boost and connectingVBAT directly to the Class-D amplifier supply. Whenhigher audio output power is required, the multi-levelboost re-activates tracking the signal to provide theadditional voltage to the load.
A configurable on-chip Battery Guard system reducesthe audio output power during the periods of lowbattery voltage to minimize the battery droppingbelow system brownout conditions. Additionally, faultssuch as brownout, over-current, and overtemperaturecan be reported back to the hostprocessor using the IRQ pin. All protection statusesare available via a register read.
TAS2560主要特性:

1• Ultra Low-Noise Mono Boosted Class-D Amplifier
– 5.6 W at 1% THD+N and 6.9 W at 10%THD+N into 4-Ω Load from 4.2-V Supply
– 3.7 W at 1% THD+N and 4.5 W at 10%THD+N into 8-Ω Load from 4.2-V Supply
• Output Noise for DAC + Class-D(ICN) is 16.2 μV
• DAC + Class-D SNR 111 dB at 1%THD+N/8 Ω
• THD+N –89 dB at 1 W/8 Ω with Flat FrequencyResponse
• Post-Filter Feedback (PFFB)
• PSRR 110 dB for 200 mVpp Ripple at 217 Hz
• Inpu...