原标题：TI AFE031低成本动力线通信(PLC)模拟前端解决方案

　　TI 公司的AFE031是低成本高集成的动力线通信(PLC)模拟前端,可采用电容或变压器和动力线进行连接. AFE031具有热保护和过流保护,和EN50065-1兼容,15V电源和1.5A时的输出摆幅12Vpp,接收模式的功耗15mW,支持 EN50065 CENELEC Bands A, B, C, D,以及FSK, S-FSK与OFDM和PRIME, G3, IEC 61334,接收器灵敏度20uV,可编程Tx/Rx增益控制,采用四线串行接口.主要用在eMetering,照明,太阳能和控制线.本文介绍了AFE031主要特性, 方框图, 动力线通信系统框图, 动力线通信调制解调器,相关电路以及开发套件TMDSPLCKIT-V3主要特性, 窄带PLC解决方案框图, 智能电网到家的PLC解决方案框图和plcSUITE软件架构图, TMDSPLCKIT-V3 PLC开发板PCB布局图.

　　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应用:

　　eMetering

　　Lighting

　　Solar

　　Pilot Wire

　　图1. AFE031方框图

　　图2. AFE031典型的动力线通信系统框图

　　图3. AFE031典型的动力线通信调制解调器

　　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.

　　图4. AFE031和MCU的数字连接电路

　　图5. AFE031发送器连接电路

　　图6. AFE031接收器连接电路

　　图7. AC/DC电源电路

　　C2000动力线调制解调器开发套件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.

　　开发套件TMDSPLCKIT-V3主要特性:

　　Two PLC modems

　　PLC software supporting OFDM (PRIME, G3 and FlexOFDM) and SFSK communication

　　Built in USB JTAG emulation

　　Two F28069 controlCARDs included

　　All necessary power and connection cables included

　　32KB limited Code Composer Studio included

　　图8.开发套件TMDSPLCKIT-V3外形图

　　图9.TI窄带PLC解决方案框图

　　图10.TI智能电网到家的PLC解决方案框图

　　图11.TI plcSUITE软件架构框图