DESIGN KIT MANUAL
Wireless Charging Solutions
Wireless Power Design Kit
–
Medium Power
Order Code: 760308MP, Version 1.0
Transmitter Module, Receiver Module and LED Load Module compliant to Qi v1.2.2
●
Abstract
ROHM Semiconductor and Würth Elektronik (WE)
offers this wireless power design kit (order code
760308MP) to demonstrate the advantages of
wireless power and to give developers the opportunity
to test and integrate a wireless power solution into
their application.
This design kit is based on the Qi specification 1.2.2
and supports the Extended Power Profile (EPP) from
the Wireless Power Consortium (WPC). Receiver and
transmitter are also backwards compatible with the
low power mode (Baseline Power Profile).
This manual describes the setup and basic usage of
this design kit.
●
●
Key Specifications
Mains power input voltage ………………100-240VAC
Regulated input voltage…..…………………….19VDC
Maximum transmitted power.................................15W
Note 1
Maximum receiver output power…….10W (15W
)
WPC Qi compliance………………………………v1.2.2
Description of Featured Products
The BD57020MWV is an IC for wireless power
transmitter applications. This device is composed of
pre-driver inverters for the TX coil, Qi compliant
controller for the communication and demodulating
circuit, GPIO, XO buffer, and I2C interface. The
BD57020MWV works as an analog frontend driven by
a general-purpose microcontroller. In this design kit
the transmitter is controlled by the MCU
ML610Q772-B03, which has all necessary firmware
to be compliant with the WPC Qi ver.1.2.2 standard
and supports wireless power transmission up to 15W.
BD57015GWL is a wireless power receiver IC. The
device integrates a fully synchronous rectifier circuit
with low-impedance FETs, Qi and PMA compliant
packet controller, adjustable regulated voltage output,
and an open-drain output terminal to communicate
with the power transmitter using amplitude
modulation. The BD57015GWL is targeted at mobile
applications
implementing
wireless
charging
compliant to Qi Medium Power (including Low Power)
and PMA standard. For further details, please also
consult the relevant product datasheets at
http://www.rohm.com.
For further details about the TX and RX coils please
visit Würth Elektronik at
http://www.we-online.de.
●
Features
Plug & Play Wireless Power Design Kit
Meets the Qi Standard of the Wireless Power
Consortium (WPC)
Complete solution consisting of TX, RX and LED
Load module
Flexible and modular approach for fast integration of
wireless power in your product design
Low power (baseline power profile) and Medium
power (extended power profile) operation
Visit
www.rohm.com/web/eu/wirelesspowerkit
for details
Note 1: Will need simple RX Module modification. If you require 15W get in
touch with ROHM customer support (see chapter 4).
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
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Wireless Power Design Kit – Medium Power – 760308MP V1.0
Design Kit Manual
Table of Contents
Cover Page...............................................................................................................................................................................1
Abstract ............................................................................................................................................................................. 1
Description of Featured Products ...................................................................................................................................... 1
Key Specifications ............................................................................................................................................................. 1
Features ............................................................................................................................................................................ 1
Introduction ............................................................................................................................................................................... 3
Hardware Description ............................................................................................................................................................... 3
Block Diagram ....................................................................................................................................................................... 3
Key components ................................................................................................................................................................... 4
Schematic, Gerber Files and Bill of Materials........................................................................................................................ 4
Design Kit Setup and Operating Instructions ............................................................................................................................ 5
Warnings ............................................................................................................................................................................... 5
Instructions for Safe Use ....................................................................................................................................................... 5
Power Supply ........................................................................................................................................................................ 5
Transmitter (TX) Module ....................................................................................................................................................... 6
Receiver (RX) Module ........................................................................................................................................................... 8
LED Load Module ................................................................................................................................................................. 9
Customer Support..................................................................................................................................................................... 9
1.
2.
2.1
2.2
2.3
3.
3.1
3.2
3.3
3.4
3.5
3.6
4.
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
2/11
EUDC59-U-004 - Rev. 1.0
Wireless Power Design Kit – Medium Power – 760308MP V1.0
1. Introduction
Design Kit Manual
WPC's Qi standard for medium power has attracted attention as a next-generation standard for inductive power transmission that
will enable wireless charging of tablet PCs while allowing smartphones and other mobile devices to be charged up to three times
faster than the existing low power standard (5W). In addition, an advanced Foreign Object Detection (FOD) function is included to
provide improved safety by detecting foreign metallic right before the power transfer has started to ensure the safety of sensitive
electronics and to avoid overheating of foreign metallic objects.
ROHM has developed this design kit to enable engineers to faster develop wireless charging in general and explore the detailed
usage of its core components on the transmitter side with the BD57020MWV and on the receiver side with the BD57015GWL.
This manual is valid for Design Kit Version 1.0. It provides guidelines to quickly setup the hardware for fast and easy evaluation of
the wireless charging system and the featured key components. For further details and updates about the TX and RX ICs and other
ROHM products, please also consult the relevant product datasheets and general information at
http://www.rohm.com.
Please also check
www.rohm.com/web/eu/wirelesspowerkit
for downloading the latest version of this document and additional
useful information such as application notes, Gerber files, schematics, bill of materials, etc.
2. Hardware Description
2.1 Block Diagram
The design kit consists of the following components:
TX Module
Demonstration of charging pad function using TX IC, MCU, discrete full bridge, QFOD circuit, TX coil
RX Module
Demonstration of wireless power receiver inside a mobile device using Receiver IC, RX coil
LED Shield
Wireless powered LED light using LED array + driver, MCU
Power Supply
Wide input range mains power supply with different adapters for international use
A block diagram of the design kit is depicted in Figure 1. The transmitter design corresponds to the MP-A7 as defined in the WPC Qi
specification 1.2.2. The necessary 19V
DC
input voltage is provided with the included mains adapter.
The key component of the Transmitter Module is the transmitter IC BD57020MWV. This IC integrates all necessary analog functions
to operate as a wireless power transmitter such as full bridge pre-driver and demodulation circuit. The digital control is realized by
the microcontroller ML610Q772-B03 which is directly supplied by one of the LDO outputs of the TX IC. The quality factor foreign
object detection (Q-FOD) circuit is realized with discrete components.
The coil area is the wireless power interface to the receiver. It is covered by a 2mm thick acryl glass plate which acts as distance
spacer and physical protection of the resonant circuit which may carry high AC voltages in certain conditions.
Figure 1: Design Kit Block Diagram
The Receiver Module integrates all necessary functions to act as a wireless power receiver such as full synchronous rectification,
power sensing, modulator, Qi/PMA packet controller and an adjustable output LDO. The key component is the BD57015GWL
receiver IC.
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
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EUDC59-U-004 - Rev. 1.0
Wireless Power Design Kit – Medium Power – 760308MP V1.0
Design Kit Manual
The MCU on the receiver side is required for the proper configuration of the RX IC. Without the configuration the RX is not sending
the needed parameters during the negotiation/calibration phase to enable the medium power transfer mode. The I2C interface is
used to set the necessary parameters such as the LDO output voltage, the current limit, FOD and QFOD settings.
The receiver system of this design kit uses a modular approach: The Load Module is designed as stackable shield on top of the
Receiver Module. This allows easy replacement of the demonstrative LED matrix load and receiver side MCU. The user may design
a custom load/MCU shield or connect to the RX Module pin headers by jumper cables.
Interoperability between transmitter and receiver is achieved by complying with the WPC Qi standard. The Transmitter Module can
supply power to any Qi compliant receiver and equally the Receiver Module can receive power from any Qi compliant transmitter.
Also, both modules are backwards compatible with a low power (baseline power profile) counterpart.
2.2 Key components
The purpose of the EVK is the evaluation of the key components used to realize the wireless power system. Table 1 gives an
overview of the different ICs and coils. For more detailed information about these devices please follow the given hyperlinks to the
individual web pages and datasheets.
Manufacturer
Rohm Semiconductor
Rohm Semiconductor
Rohm Semiconductor
Rohm Semiconductor (Lapis)
Rohm Semiconductor (Lapis)
Rohm Semiconductor
Würth Elektronik eiSos
Würth Elektronik eiSos
Product
Wireless Power Transmitter IC
Step-Down Switching Regulator
Wireless Power Receiver IC
Microcontroller
Microcontroller
LED driver 8ch
Transmitter Coil
Receiver Coil
Part Number
BD57020MWV
BD9E151NUX
BD57015GWL
ML610Q772-B03
ML610Q112
BD6142AMUV
760 308 110
760 308 102 207
Used in
TX Module
TX Module
RX Module
TX Module
LED Module
LED Module
TX Module
RX Module
Table 1: Key components used in the design kit
2.3 Schematic, Gerber Files and Bill of Materials
Please visit
www.rohm.com/web/eu/wirelesspowerkit
for downloading the latest production data consisting of the schematics,
assembly data, Gerber files and Bill of Materials (BOMs) for all three modules of this design kit.
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
4/11
EUDC59-U-004 - Rev. 1.0
Wireless Power Design Kit – Medium Power – 760308MP V1.0
3. Design Kit Setup and Operating Instructions
3.1 Warnings
Design Kit Manual
This design kit must only be operated by trained professionals.
This design kit should be operated in a well ventilated environment and, if used inside a case, the case should not be
covered.
This design kit should be placed on a stable, flat, non-conductive surface in use and should not be contacted by conductive
items.
All peripherals used with the design kit should comply with relevant standards for the country of use and be marked
accordingly to ensure that safety and performance requirements are met.
Where peripherals are connected that do not include the cable or connector, the cable or connector used must offer
adequate insulation and operation in order that the requirements of the relevant performance and safety are met.
The connection of incompatible devices to the design kit may affect compliance or result in damage to the unit and
invalidate the warranty.
The AC voltage in the resonant tank may reach voltage up to 250Vpp under
certain conditions. Therefore, it is covered by acryl glass to ensure human
safety. Nevertheless take care not to touch the PCB by bare hand and use
the required level of isolation when probing test points on the PCB.
WARNING
3.2 Instructions for Safe Use
Do not expose the design kit to water, moisture or place on a conductive surface whilst in operation.
Take care whilst handling to avoid mechanical or electrical damage to the printed circuit board and components.
Avoid handling the printed circuit board while it is powered. Only handle by the edges to minimize the risk of electrostatic
discharge damage.
Do not short any outputs to each other, to the supply or to GND.
Do not operate the design kit outside its specified ratings.
Take care to monitor the PCB and IC temperatures in particular when operating with high power loads and do not exceed
the absolute maximum ratings of all components.
3.3 Power Supply
Apply one of the included mains plugs (North America / Japan, Great Britain, Central Europe) with the power supply and connect the
AC plug to mains. Connect the DC plug of the mains adapter to
CONN1
of the Transmitter Module.
In case another power supply is used please make sure to comply with the electrical characteristics as the provided mains adapter
(see Table 2). Take care not to reverse polarize the applied voltage.
Parameter
Input voltage
Output voltage
Output current rating
Specification
100-240V AC, 50/60Hz
19V DC
5%
2A
Table 2: Mains adapter specification
Figure 2: Included power supply with 3 different mains adapter plugs
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
5/11
EUDC59-U-004 - Rev. 1.0
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