TI 公司的AFE031是低成本高集成的動力線通信(PLC)模擬前端,可采用電容或變壓器和動力線進行連接. AFE031具有熱保護和過流保護,和EN50065-1兼容,15V電源和1.5A時的輸出擺幅12Vpp,接收模式的功耗15mW,支持EN50065 CENELEC Bands A, B, C, D,以及FSK, S-FSK與OFDM和PRIME, G3, IEC 61334,接收器靈敏度20uV,可編程Tx/Rx增益控制,采用四線串行接口.主要用在eMetering,照明,太陽能和控制線.本文介紹了AFE031主要特性, 方框圖, 動力線通信系統框圖, 動力線通信調制解調器,相關電路以及開發套件TMDSPLCKIT-V3主要特性, 窄帶PLC解決方案框圖, 智能電網到家的PLC解決方案框圖和plcSUITE軟件架構圖, TMDSPLCKIT-V3 PLC開發板PCB布局圖.
The AFE031 is a low-cost, integrated, powerline communications (PLC) analog front-end (AFE) device that is capable of capacitive- or transformer-coupled connections to the powerline while under the control of a DSP or microcontroller. It is ideal for driving low-impedance lines that require up to 1.5 A into reactive loads. The integrated receiver is able to detect signals down to 20 µVRMS and is capable of a wide range of gain options to adapt to varying input signal conditions. This monolithic integrated circuit provides high reliability in demanding powerline communications applications.
The AFE031 transmit power amplifier operates from a single supply in the range of 7 V to 26 V. At maximum output current, a wide output swing provides a 12-VPP (IOUT = 1.5 A) capability with a nominal 15-V supply. The analog and digital signal processing circuitry operates from a single 3.3-V power supply.
The AFE031 is internally protected against overtemperature and short-circuit conditions. It also provides an adjustable current limit. An interrupt output is provided that indicates both current limit and thermal limit. There is also a shutdown pin that can be used to quickly put the device into its lowest power state. Through the four-wire serial peripheral interface, or SPI™, each functional block can be enabled or disabled to optimize power dissipation.
The AFE031 is housed in a thermally-enhanced, surface-mount PowerPAD package (QFN-48). Operation is specified over the extended industrial junction temperature range of –40℃ to +125℃.
AFE031主要特性:
Integrated Powerline Driver with Thermal and Overcurrent Protection
Conforms to EN50065-1
PRIME Certified
Large Output Swing: 12 VPP at 1.5 A (15-V Supply)
Low Power Consumption: 15 mW (Receive Mode)
Programmable Tx and Rx Filters
Supports EN50065 CENELEC Bands A, B, C, D
Supports FSK, S-FSK, and OFDM
Supports PRIME, G3, IEC 61334
Receive Sensitivity: 20 µVRMS, Typical
Programmable Tx/Rx Gain Control
Four-Wire Serial Peripheral Interface
Two Integrated Zero Crossing Detectors
Two-Wire Transceiver Buffer
48-Pin QFN PowerPAD™ Package
Extended Junction Temperature Range:
–40℃ to +125℃
AFE031應用:
eMetering
Lighting
Solar
Pilot Wire
圖1. AFE031方框圖
圖2. AFE031典型的動力線通信系統框圖
圖3. AFE031典型的動力線通信調制解調器
The AFE031 is an integrated power-line communications analog front-end device that consists of a variety of functional blocks; the device is driven by a microcontroller. The AFE031 is designed to work with a minimum of external components, and only a few additional passive components are required for the device to work in a range of AFE designs.
圖4. AFE031和MCU的數字連接電路
圖5. AFE031發送器連接電路
圖6. AFE031接收器連接電路
圖7. AC/DC電源電路
C2000動力線調制解調器開發套件TMDSPLCKIT-V3
The C2000 Power Line Modem Developer’s Kit enables easy development of software based Power Line Communication (PLC) modems. The kit includes two PLC modems based on the C2000 TMS320F28069 controlCARD and TI’s advanced PLC analog front end AFE031. The included PLC SUITE software supports several communication techniques, including OFDM (PRIME/G3 and FlexOFDM) and SFSK. The kit includes onboard USB JTAG emulation and Code Composer Studio.
開發套件TMDSPLCKIT-V3主要特性:
Two PLC modems
PLC software supporting OFDM (PRIME, G3 and FlexOFDM) and SFSK communication
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Built in USB JTAG emulation
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Two F28069 controlCARDs included
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All necessary power and connection cables included
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32KB limited Code Composer Studio included
圖8.開發套件TMDSPLCKIT-V3外形圖
圖9.TI窄帶PLC解決方案框圖
圖10.TI智能電網到家的PLC解決方案框圖
圖11.TI plcSUITE軟件架構框圖
圖12. TMDSPLCKIT-V3 PLC開發板PCB布局圖(頂層)
詳情請見:
http://www.ti.com/lit/ds/symlink/afe031.pdf
和
http://www.ti.com/lit/an/sboa130/sboa130.pdf
