rohm公司的BD57015GWL是單獨可用的無線功率接收器，集成了有低阻抗FET的全同步整流電路，Qi兼容和PMA兼容包控制器，可調整穩(wěn)壓電壓輸出，以及和功率發(fā)送器通信的漏極開路輸出;而BD57020MWV是無線功率發(fā)送器，包括用于線圈驅動的逆變器，和Qi兼容和解調電路通信的控制器，以及GPIO，TCXO緩沖器和I2C接口。無線充電發(fā)送器和接收器主要用在需要無線充電的移動應用。本文介紹了無線功率接收器BD57015GWL主要特性，框圖和應用電路，無線功率發(fā)送器BD57020MWV主要特性和指標，框圖，應用電路以及15W無線充電Qi發(fā)送（BD57020MWV-EVK-002）和接收（BD57015GWL-EVK-002）參考設計主要特性和指標與電路圖。

1）無線功率接收器BD57015GWL

BD57015GWL is a stand-alone wireless power receiver IC. The device integrates a fully synchronous rectifier circuit with low-impedance FETs， Qi compliant and PMA compliant packet controller， adjustable regulated voltage output， and an open-drain output terminal to communicate with the power transmitter using amplitude modulation. BD57015GWL is targeted at mobile applications implementing wireless charging compliant to Qi Medium Power standard and the PMA standard.

BD57015GWL主要特性：

7 Programmable Output Voltages

Maximum Input Voltage

Maximum Input/Output Current

AC Input Frequency Range

5.0 to 12.0 V

20 V （Max）

1.5 A （Max）

100 to 480 kHz

Low Impedance FET rectifier

High efficiency fully synchronous rectifier

Maximum Input Voltage of 20V

Supports Qi standard ver1.2， PMA standard SR1

Automatic Detection of Qi / PMA， or selection byexternal pin

Open-Drain output terminal for modulation

TX-RX coil Position Gap alarm

BD57015GWL應用：

Qi and/or PMA Compliant Devices

Smart Phones

Cell Phones

Hand-held Mobile Devices

Hand-held Mobile Devices

圖1.BD57015GWL典型應用電路

圖2.BD57015GWL框圖

圖3.BD57015GWL應用電路圖

圖4.BD57015GWL和微控制器連接圖

2）無線功率發(fā)送器BD57020MWV

BD57020MWV is an integrated IC for the wireless power transmitter. This device is composed of inverters for the coil drive， controller for the communication of the Qi compliant and demodulating circuit， GPIO， TCXO buffer， and I2C interface. BD57020MWV works as a controller in the wireless power transmitter based on the Qi compliant by using it with a general-purpose microcomputer. BD57020MWV is applied to Qi ver.1.2 （Low Power and Medium Power）。

Wireless charging technology is becoming increasingly popular in the mobile device sector by eliminating power cords， providing the ability to send power and even data across multiple interfaces.

In addition， wireless charging is expected to increase convenience and decrease waste by allowing multiple devices to use a single charger. Removing cords and connectors translates to improved safety， size， and reliability - as well as a better user experience.

Standards organizations such as Wireless Power Consortium （WPC） and Air Fuel exist to develop and promote international standards for wireless charging that are gradually being introduced in the smartphone and infrastructure markets in the US and Europe. As a regular member of WPC， ROHM actively participates from the development stage of WPC ’s increasingly popular Qi standard and has been quick to develop products that meet market needs.

ROHM leads the industry in product development， including reference designs with integrated wireless charge control IC that have already obtained Qi certification.

ROHM offers a broad portfolio of wireless charging products for wireless power solutions. For more detailed information， login to MyROHM to view support materials such as datasheets， diagrams， user manuals， and more.

BD57020MWV主要指標：

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主要特性：

WPC / Qi ver.1.2 BPP / EPP （Baseline Power Profile/ Extended Power Profile） support.

Half Bridge / Full Bridge inverter

Foreign object detection

GPIO 4CH

I2C bus interface

5.0mm x 5.0mm UQFN package 40 pin

BD57020MWV應用：

WPC compliant devices

PC

Cradle for charge stand

圖5.BD57020MWV框圖

圖6.BD57020MWV典型應用電路圖(1)

圖7.BD57020MWV應用電路圖(2)

15W無線充電Qi發(fā)送（BD57020MWV-EVK-002）和接收（BD57015GWL-EVK-002）參考設計

15W-class wireless charge Qi certified transmission （BD57020MWV-EVK-002） and receiver （BD57015GWL-EVK-002） reference boards are now available for purchase online.

圖8.15W無線充電Qi發(fā)送和接收參考設計外形圖

The BD57020MWV-EVK-002 and BD57015GWL-EVK-002 integrate ROHM’s wireless charge control IC and LAPIS Semiconductor’s low-power MCU， making it easy to achieve a Qi medium power certified wireless charger by simply using both receiver and transmitter boards. In addition， Qi certification enables intercompatibility with other Qi-certified devices.

15W-Qi發(fā)送器BD57020MWV-EVK-002

圖9.15W-Qi發(fā)送器BD57020MWV-EVK-002外形圖

15W-Qi發(fā)送器BD57020MWV-EVK-002主要指標：

?Coil design ： MP-A7

?Input Voltage ：19V

?WPC Qi compliant （Ver. 1.2.2）

Extended Power Profile

?Q-FOD/Calibration-FOD adopted

圖10.15W-Qi發(fā)送器BD57020MWV-EVK-002電路圖

15W Qi接收器BD57015GWL-EVK-002

圖11.15W Qi接收器BD57015GWL-EVK-002外形圖

15W Qi接收器BD57015GWL-EVK-002主要指標：

?Vout ：9/10/12V （on the MP-Tx）

：5V （on the LP-Tx）

?Imax ：1.75A（5/9V）/1.6A（10V）/1.4A（12V）

?WPC Qi compliant （Ver. 1.2.2）

圖12.15W Qi接收器BD57015GWL-EVK-002電路圖