原标题：Rohm BD57020MWV Qi无线充电参考设计

　　rohm公司的BD57020MW是无线电源发送器,包括了用于线圈驱动的逆变器,Qi兼容的通信控制器和解调电路,GPIO,TCXO缓冲器和I2C接口,支持Rohm BD57020MWV Qi无线充电(低功率和中功率),主要用于WPC兼容设备,PC和充电支架底座.本文介绍了BD57020MWV主要特性和指标,框图,典型应用电路图及材料清单与WPC Qi中功率充电参考设计电路图.

　　BD57020MWV is an integrated IC for the wireless powertransmitter. This device is composed of inverters for thecoil drive, controller for the communication of the Qicompliant and demodulating circuit, GPIO, TCXO buffer,and I2C interface.

　　BD57020MWV works as a controller in the wirelesspower transmitter based on the Qi compliant by using itwith a general-purpose microcomputer.

　　BD57020MWV is applied to Qi ver.1.2 (Low Power andMedium Power).

　　BD57020MWV主要特性:

　　WPC / Qi ver.1.2 (Low Power and Medium Power)support.

　　Half Bridge / Full Bridge inverter

　　Foreign object detection

　　GPIO 4CH

　　I2C bus interface

　　5.0mm x 5.0mm UQFN package 40 pin

　　BD57020MWV主要指标：

　　Input Power Supply Voltage Range: 4.2 V to 5.3 V

　　Input Adapter Voltage Range: 4.6 V to 20 V

　　Drive Frequency Range: 110kHz to 205kHz

　　Operating Temperature Range: -20℃ to +85℃

　　BD57020MWV应用:

　　WPC compliant devices

　　PC

　　Cradle for charge stand

　　图1.BD57020MWV框图

　　图2.BD57020MWV典型应用电路框图

　　图3.BD57020MWV典型应用电路图

　　BD57020MWV典型应用电路中材料清单(BOM):

　　BD57020MWV参考设计

　　A sample circuit design that has been tested and can be used by customers as a reference in their own designs.

　　图4.BD57020MWV参考设计外形图

　　图5.BD57020MWV WPC Qi中功率参考设计电路图