原标题：Maxim MAX20340双向DC动力线通信管理解决方案

　　Maxim公司的MAX20340是通用双向DC动力线通信(PLC)管理集成电路,最大比特率为166.7kbps,器件的最大充电电流为1.2A. 器件具有从指向电路,当PLC主检测到在动力线上存在PLC从时能对系统进行中断.这种功能使得系统保持在低功耗状态直到从设备被连接上.MAX20340的许多特性如主/从模式,I2C寻址,双路/单路PLC从模式和PLC从地址是引脚可配置的.器件采用1.358mm x 1.358mm WLP封装.主要用在真正的无线耳塞,有线无线耳机,助听器,可穿戴,游戏控制台,手持无线电和销售终端(POS)设备.本文介绍了MAX20340主要优势和特性,功能框图,带吊架无线耳塞充电路以及评估板MAX20340 EVK主要特性,电路图,材料清单和PCB设计图.

　　The MAX20340 is a universal bidirectional DC powerline communication (PLC) management IC with a 166.7kbps maximum bit rate. The device is capable of a maximum of 1.2A charge current.

　　The MAX20340 features a slave detection circuit that flags an interrupt to the system when the PLC master detects the presence of a PLC slave on the power line. This function allows the system to remain in a low-power state until a slave device is connected.

　　Many of the features of the MAX20340, such as master/slave mode, I2C address, dual/single PLC slave mode, and PLC slave address, are pin configurable.

　　The device is available in a 9-bump, 0.4mm pitch, 1.358mm x 1.358mm wafer-level package (WLP).

　　MAX20340主要优势和特性:

　　• Compact, Simple Solution for PLC

　　• Up to 166.7kbps Bit Rate

　　- 5.7kbps Data Throughput in Automatic Mode

　　• 1.2A Charge Current

　　• Automatic Detection of PLC Slave Presence

　　• Flexible Configuration

　　• Single Resistor to Program

　　• PLC Master or Slave

　　• Dual or Single Slave Mode (Master Only)

　　• PLC Slave Address (Slave Only)

　　• I2C Address

　　• Small Solution Size

　　• Space-Saving 0.4mm Pitch, 9-Bump, 1.358mm x 1.358mm WLP

　　MAX20340应用:

　　• Truly Wireless Earbuds

　　• Tethered Wireless Headphones

　　• Hearing Aids

　　• Wearables

　　• Game Controllers

　　• Handheld Radios

　　• Point of Sales Devices

　　图1. MAX20340功能框图

　　图2. MAX20340应用框图:带吊架无线耳塞充电路

　　评估板MAX20340 EVK

　　The MAX20340 evaluation kit (EV kit) is a fully assembled and tested PCB that evaluates the MAX20340 bidirectional powerline communication (PLC) management integrated circuit. The EV kit obtains power from an external power source or the MAX32625PICO microcontroller that contains the firmware necessary to use the EV kit GUI program. Installed with two MAX20340s (one Master and one Slave), the EV kit features a master/slave mode PLC with flexible configurations. The EV kit ships with jumpers installed and supply voltages set to typical operating values.

　　图3.评估板MAX20340 EVK外形图(1)

　　图4.评估板MAX20340 EVK外形图(2)

　　评估板MAX20340 EVK主要特性:

　　USB-Powered Operation

　　Compact and Simple Solution for PLC

　　Flexible Configuration

　　On-Board Regulator and Battery-Charging Circuitry

　　Windows® 8/10-Compatible GUI Software

　　Fully Assembled and Tested

　　Evaluation Kit Contents

　　MAX20340 EV Kit

　　Two USB A to micro-USB Cables

　　图5.评估板MAX20340 EVK双从模式建立图

　　图6.评估板MAX20340 EVK电路图(1)

　　图7.评估板MAX20340 EVK电路图(2)