Infineon公司的MA12070P是帶I2S數字輸入的無濾波器高效+4V到+26V音頻放大器.這種超效率音像功率放大器是基于有所有全的多級開關技術,可以用在許多不同的應用領域.多級開關在工作時有非常低的功耗,可使放大器在各種音頻產品中滿功率時無濾波器配置.MA12070P具有嵌入數字功率管理方案,功率管理算法動態調整開關頻率和調制,以優化功耗和EMI.集成的數模轉換器(DAC)賦能數字I2S音頻流輸入.支持的取樣頻率從44.1 kHz 到192 kHz.器件還提供高度靈活的輸出級配置,從表面上看單端輸出到單個并行BTL輸出.MA12070P的高效率(PMP4)包括小于160mW的空閑功耗,2W的效率大于80%,滿功率時的效率大于92%.MA12070P的音頻性能(PMP2)包括>101dB DNR (A律, 1% THD+N 功率電平),輸出綜合噪音(A律)為140μV,高輸出時的THD+N為0.007%.器件采用4階反饋誤差控制.連續輸出功率為2x30W,峰值輸出功率為2x80W.器件的保護功能包括欠壓鎖住,超溫告警/誤差,短路/過載保護,功率級引腳本-引腳短路,通過I2C進行到底誤差報告,DC保護和I2C控制(四個可選擇地址).主要用在電池供電揚聲器,無線和塢站揚聲器,條形音箱,多房間系統和家庭影院.本文介紹了MA12070P主要特性,應用框圖和容量和限制器處理器(VLP)功能框圖以及40W開發板KIT_ARDMKR_AMP_40W主要特性與指標,電路圖,材料清單和PCB設計圖.
The MA12070P is a super-efficient audio poweramplifier based on proprietary multi-level switchingtechnology. It supports a 4-26V supply voltage range,allowing it to be used in many different applications.
Multi-level switching enables very low power lossduring operation. In addition, it allows the amplifier tobe used in filterless configurations at full rated powerin a wide range of audio products.
The MA12070P features an embedded digital powermanagement scheme. The power managementalgorithm dynamically adjusts switching frequency andmodulation to optimize power loss and EMI across theoutput power range.
An integrated digital-to-analog converter enablesdigital I2S audio stream input. It supports sample ratesfrom 44.1 kHz to 192 kHz.
Highly flexible output stage configurations are offered,ranging from four single-ended outputs to a singleparallel-BTL output.
The MA12070P features protection against DC, shortcircuits,over-temperature and under-voltagesituations.
Flexible “Power Mode Profiles” allow the user to utilizethe multi-level switching technique for very low powerloss or very high audio performance.
Device communication and programming is controlledthrough an I2C interface as well as dedicated controlpins.
MA12070P主要特性:
• Proprietary Multi-level Switching Technology
◦ 3-level and 5-level modulation
◦ Low EMI emission
◦ Filterless amplification
◦ Digital Power Management Algorithm
• High Power Efficiency (PMP4)
◦ <160mW Idle power dissipation (26V PVDD,all channels switching)
◦ >80% Efficiency at 2W power (1kHz sine, 8Ω)
◦ >92% Efficiency at Full Power (1kHz sine, 8Ω)
• Audio Performance (PMP2)
◦ >101dB DNR (A-w, rel. to 1% THD+N powerlevel)
◦ 140μV output integrated noise (A-w)
◦ 0.007% THD+N at high output levels
• 4th Order Feedback Error Control
◦ High suppression of supply disturbance
◦ HD audio quality
• Supply Voltages: +4V to +26V (PVDD) and +5V(A/DVDD)
• Volume Control and Limiter
• 2x30W continuous output power (RL = 8Ω at 22V,PMP4, 10% THD+N level, without heatsink)
• 2×80W peak output power (26V PVDD, RL = 4Ω,10% THD+N level)
• 2.0, 2.1, 4.0, 1.0 Output Stage Configurations
• Protection
◦ Under-voltage-lockout
◦ Over-temperature warning/error
◦ Short-circuit/overload protection
◦ Power stage pin-to-pin short-circuit
◦ Error-reporting through serial interface (I2C)
◦ DC protection
• I2C control (four selectable addresses)
• Heatsink free operation with EPAD-down package
MA12070P封裝:
• 64-pin QFN Package with exposed thermal pad(EPAD) and Lead-free Soldering
MA12070P應用:
• Battery Operated Speakers
• Wireless and Docking Speakers
• Soundbars
• Multiroom Systems
• Home Theater Systems
圖1.MA12070P應用框圖
圖2.MA12070P容量和限制器處理器(VLP)功能框圖
40W開發板KIT_ARDMKR_AMP_40W
Design of an Arduino compatible audio amplifier platform
This document describes the design principles of an audio amplifier platform that is compatible with Arduino boards supporting I2S audio playback. More specifically, this application note will discuss the design of the KIT_ARDMKR_AMP_40W board on both hardware (PCB design) and firmware (Arduino code). The board contains Infineons MA12070P multilevel amplifier, which will be discussed in more detail. The content should enable both professional engineers as well as DIYs to build prototypes, reproduce the design, or pick up the design for further development as part of the product design process. The design is generic in principle and can be used in combination with any audio board that supports I2S audio playback.
The Arduino project started in 2005 as a student program at the Interaction Design Institute Ivrea, in Ivrea, Italy, aiming to provide an affordable and easy way to create devices that interact with their environment while using advanced microprocessors, controllers, sensors and transducers.
Since 2005, Arduino boards have been steadily growing in popularity among makers and DIY enthusiasts, who have developed a broad range of projects, from gaming consoles and drone controls to various smart home automation projects.
Arduino boards are based on open-source hardware and software, licensed under the GNU Lesser General Public License (LGPL) or the GNU General Public License (GPL), enabling board manufacturing and software distribution by anyone. This extends the development of high-performance embedded computing power to a much wider audience – including people without alo professional hardware or software background.
When looking at the types of DIY projects, it is interesting to see that many revolve around audio connectivity, e.g., IoT audio interaction or stand-alone audio players. Until recently it was necessary to add several separate boards or “shields” together to realize such a system.
This has changed since the release of the MKR family, where Arduino has now added audio features such as an I2S bus, SD card audio read/write and Alexa voice-control compatibility. This also makes the Arduino platform a perfect demonstration vehicle for Infineons high-performance integrated class D audio ICs.
By releasing a fully compatible amplifier board with enough output power to drive a variety of speakers – all with best-in-class audio performance, low power consumption and high efficiency – Infineon is providing yet another useful building block in the Arduino ecosystem.
The Infineon Arduino board has the following key parameters and features:
· Equipped with MERUSTM MA12070P proprietary multilevel amplifier
· Power input: 5 V/2.5 A – sourced from the same single USB-C power supply or battery pack
· No need for external or extra power supplies
· Up to 40 W instantaneous peak output power with a USB-C power supply or battery pack
· Compatible with Arduino MKRZERO and MKR1000 Wi-Fi
· Full hardware control, customization and error monitoring through the Arduino programming framework
The KIT_ARDMKR_AMP_40W board is an audio amplifier board compatible with the MKRZERO board from Arduino and built around Infineons MERUS™ MA12070P multilevel amplifier. In Figure 2 the following main system components are identified:
1. USB-C power input
2. Boost converter
3. Bulk capacitance
4. Audio amplifier
5. User interface
6. Arduino microcontroller
圖3.40W開發板KIT_ARDMKR_AMP_40W外形圖
圖4.系統概述圖
40W開發板KIT_ARDMKR_AMP_40W主要特性和指標:
· Equipped with MERUSTM MA12070P proprietary multilevel amplifier
· Power input: 5 V/2.5 A – sourced from the same single USB-C power supply or battery pack
· No need for external or extra power supplies
· Up to 40 W instantaneous peak output power with a USB-C power supply or battery pack
· Compatible with Arduino MKRZERO and MKR1000 Wi-Fi
· Full hardware control, customization and error monitoring through the Arduino programming framework
電指標:
圖5.40W開發板KIT_ARDMKR_AMP_40W主板電路圖
圖6.電源和板接口電路圖
圖7.升壓轉換器電路圖
圖8.D類放大器和配置電路圖
圖9.MA12070P設計電路圖
40W開發板KIT_ARDMKR_AMP_40W材料清單:
圖10.40W開發板KIT_ARDMKR_AMP_40W PCB設計圖(1)
圖11.40W開發板KIT_ARDMKR_AMP_40W PCB設計圖(2)
圖12.40W開發板KIT_ARDMKR_AMP_40W PCB設計圖(3)
圖13.40W開發板KIT_ARDMKR_AMP_40W PCB設計圖(4) |
