TI公司的TAS2560是低功耗高性能數字輸入D類音頻放大器,4.2V電源1% THD+N時能向4歐姆負載提供5.6W,輸入取樣頻率8 kHz 到96 kHz,內置自動增益控制(AGC),主要用在手機,平板電腦,個人電子學,建筑物/家庭自動化,藍牙揚聲器和附件.本文介紹了TAS2560主要特性,框圖,立體聲配置圖和典型應用電路,以及5.6W D類音頻放大器模塊TAS2560 EVM主要特性,電路圖,材料清單和PCB設計圖.
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
• Input Sample Rates from 8 kHz to 96 kHz
• High Efficiency Class-H Boost Converter
– Automatically Adjusts Class-D Supply
– Multi-level Tracking to Improve Efficiency
• Built-In Speaker Sense
– Measures Speaker Current and Voltage
– Measures VBAT Voltage, Chip Temperature
• Built-In Automatic Gain Control (AGC)
– Limits Battery Current Consumption
• Adjustable Class-D Switching Edge-Rate Control
• Power Supplies
– Boost Input: 2.9 V to 5.5 V
– Analog/Digital: 1.65 V to 1.95 V
– Digital I/O: 1.62 V to 3.6 V
• Thermal, Short-Circuit, and Under-VoltageProtection
• I2S, Left-Justified, Right-Justified, DSP, and TDM,and PDM
• I2C Interface for Register Control
• Stereo Configuration Using Two TAS2560Devices
TAS2560應用:
• Mobile Phones
• Tablets
• Personal Electronics
• Building / Home Automation
• Bluetooth Speakers and Accessories
圖1.TAS2560功能框圖
圖2.兩個TAS2560 TDM模式的立體聲配置圖
圖3.TAS2560典型應用-數字音頻輸入
TAS2560 5.6W D類音頻放大器模塊TAS2560 EVM
The TAS2560 evaluation module enables users to quickly and easily evaluate the TAS2560 audio amplifier. This small reference design comes with an USB cable to easily connect the board to your PC and control with a register based graphical user interface provided within Pure Path Console 3 (PPC3). The USB cable also allows for audio routing directly to the EVM. Users can evaluate the audio quality and analog performance that the TAS2560 provides. A +5V power supply and speaker, not included, is required for power and audio evaluation.
TAS2560 5.6W D類音頻放大器模塊TAS2560 EVM主要特性:
TAS2560 5.7W Class-D Audio Amplifier w/ IV Sense
USB cable for control and digital audio input
PurePath console 3 software access
Stereo capable when connecting two TAS2560 evaluation modules
The TAS2560 EVM supports evaluation and development with the TAS2560 through the followinginterfaces:
1. USB interface
(a) TAS2560 control through PurePath™ Console 3 GUI, USB-HID
(b) USB-class Audio Device, compatible with Microsoft® Windows® 7
2. Digital audio AP/PSIA interface through 100-mil headers
3. TI Learning Board 2 for speaker characterization
4. SPI interface for TAS2560 control
5. I2C interface for TAS2560 control
圖4.5.6W D類音頻放大器評估模塊TAS2560 EVM外形圖
圖5.5.6W D類音頻放大器評估模塊TAS2560 EVM電路圖(1)
圖6.5.6W D類音頻放大器評估模塊TAS2560 EVM電路圖(2)
圖7.5.6W D類音頻放大器評估模塊TAS2560 EVM電路圖(3)
圖8.5.6W D類音頻放大器評估模塊TAS2560 EVM電路圖(4)
圖9.5.6W D類音頻放大器評估模塊TAS2560 EVM電路圖(5)
5.6W D類音頻放大器評估模塊TAS2560 EVM材料清單:
圖10.5.6W D類音頻放大器評估模塊TAS2560 EVM PCB設計圖(1)
圖11.5.6W D類音頻放大器評估模塊TAS2560 EVM PCB設計圖(2)
圖12.5.6W D類音頻放大器評估模塊TAS2560 EVM PCB設計圖(3)
圖13.5.6W D類音頻放大器評估模塊TAS2560 EVM PCB設計圖(4)
圖14.5.6W D類音頻放大器評估模塊TAS2560 EVM PCB設計圖(5)
圖15.5.6W D類音頻放大器評估模塊TAS2560 EVM PCB設計圖(6)
圖16.5.6W D類音頻放大器評估模塊TAS2560 EVM PCB設計圖(7)
圖17.5.6W D類音頻放大器評估模塊TAS2560 EVM PCB設計圖(8)
圖18.5.6W D類音頻放大器評估模塊TAS2560 EVM PCB設計圖(9)
|
