NXP Semiconductors WPR1500-BUCK User manual

NXP Semiconductors
User’s Guide
© NXP Semiconductors
1 Introduction
This document describes how to use the WPR1500-BUCK
medium power receiver reference board designed by NXP
Semiconductors. It supports 15 W, is compliant with the
WPC Qi V1.2.2 specifications, and has the capability to
support future standards. It is a low-cost reference solution
that can be easily customized using the FreeMASTER tool.
Figure 1. WPR1500 reference board – BUCK
Document Number: WPR1500BUCKMPUG
Rev. 0, 09/2016
Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. System Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. Package Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
4. System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . 2
5. Hardware Description . . . . . . . . . . . . . . . . . . . . . . . . . 3
6. Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8. Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
WPR1500-BUCK MP Receiver V2.1
Reference Design User’s Guide

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System Features
2 System Features
The WPR1500 medium power receiver reference board has the following features:
• Reference design compliant with medium power WPC Qi V1.2.2 specifications
• Input power of 3.5 V – 20 V AC in peak from the transmitter through the receiver coil
• Output power of 15 W (5 V @ 3 A)
• Support of FSK communication signals from medium power transmitter
• Hardware protection of rectifier voltage, output voltage and output current
• Small PCB size (40 mm × 40 mm)
• FreeMASTER tool to enable customization and calibration
3 Package Checklist
4 System Block Diagram
The WPR1500 medium power receiver wireless charging system is shown in Figure 2.
Figure 2. Wireless charging system overview
For the WPC Qi information, visit www.wirelesspowerconsortium.com/developers/
Table 1. Package checklist
Name Count
WPR1500-BUCK board 1
WPR1500 debug board 1
10-pin SWD debug cable 1
Base Station
Transmitter
Transmitter
Mobile Device
Receiver
Transmitter
Load
System
Power
Power Conversion Power Pick-up
Control
Control
Messages
CommComm
Mod
DeMod
Messages
DeMod
Mod

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Hardware Description
5 Hardware Description
5.1 Reference board block diagram
Figure 3. WPR1500 receiver board block diagram – BUCK
5.2 Modules explanation
Figure 4. WPR1500-BUCK board modules overview

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Getting Started
• Controller
The NXP WPR15xx MCU is the central controller of the WPR1500 receiver board. The chip is a
higher integrated receiver controller MCU for wireless power transfer applications. The WPR15xx
is an ARM®Cortex®M0+ core ASSP with NXP’s UHV technology. It includes the FSK and CNC
models that allow easy development for bi-directional communication architecture between the
transmitter and receiver. The PGA model handles small signal, which eases the solution for foreign
object detection. The USB / adapter switcher sets the priority between wired and wireless charging.
The following modules are used in this application:
— CNC controls the communication and provides AC protection
— High voltage input PMC module with three power modes: Run, Wait, Stop
— Programmable gain amplifier (PGA) with differential input and output
— FSK demodulation timer (FSKDT)
— WDOG with independent clock source
• Rectifier
The rectifier uses self-driven sync type. It has the following characteristics:
— Input voltage : 3.5 V – 20 V AC peak
— Output voltage: 3.5 V – 20 V DC
• Communication
— The ASK differential bi-phase signal is modulated by switching the modulation capacitor
— The FSK signal is demodulated by the CNC and FSKDT modules
•USBswitch
— The CNC module automatically detects the input voltage from wired power plugs, and switches
on wired power when the input voltage is in the range of 4.5 V – 5.5 V
• DC–DC converter
— Input voltage : 5 V – 21 V DC
— Output voltage / current: 5 V DC / 3 A.
6 Getting Started
6.1 System development environment
The WPR1500 receiver board supports debugging using the IDE (IAR, Keil MDK or CodeWarrior) and
FreeMASTER tools. Figure 5 shows setup of the debug connection. The debugger and the debug board
are placed between the PC and the receiver board.
To download an image onto the WPR1516 chip, connect a debugger (J-Link or P&E-Multilink FX) to the
SWD port of a debug board, and connect the debug board to the receiver board using a 10-pin cable. The
micro interface on the debug board must be connected to the USB to get power.
To monitor the working status of the WPR1500 receiver board, short jumper J110 on the debug board, and
connect the micro interface on the debug board to the PC through a micro USB cable.

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Getting Started
Figure 5 shows the connection diagram and Figure 6 shows a real setup.
Figure 5. Debug connections
Figure 6. Development environment
For details on the J-Link debugger, visit nxp.com and search for “J-Link”.
FreeMASTER
J-Link
Debug board
WPR1500
Receiver board
12 V / 2.4 A
DC adapter
NXP MP
Tx board

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Getting Started
6.2 Downloading and debugging firmware
6.2.1 Connecting the J-Link debugger
Connect the J-Link debugger to the SWD port of the debug board, and then connect the debug board to the
receiver board using a 10-pin cable.
NOTE
The micro interface on the debug board must be connected to the USB to
receive power. Ensure that the jumper J110 is connected before the
download.
The J-Link connection is shown in Figure 7.
Figure 7. J-Link connection
When the J-Link is plugged into the PC, it can be found in Windows Device Manager, as shown in Figure 8
and Figure 9.


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Getting Started
Figure 8. J-Link debugger plugged in
Figure 9. P&E Multilink debugger plugged in

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Getting Started
6.2.2 Downloading an existing WPR1500 project using IAR 7.30 or later
versions
To download an existing WPR1500 project using IAR, perform the following steps:
1. Set up the IAR embedded workbench.
The IAR embedded workbench tool is required. Since the receiver driver library is already
included in the lib folder of the wireless charger application project, you can open the application
project and build the applications directly whenever the wpr_lib.a is ready.
The configurations in MWPR1516_config.h are set for the BUCK board by default. To build this
project for the LDO board, change the macro definition BOARD_OUT_TYPE from #define
BOARD_OUT_TYPE OUT_TYPE_BUCK to #define BOARD_OUT_TYPE OUT_TYPE_LDO.
Then rebuild all the file in the project.
The demo applications workspace files are located in:
<software_package>/build/wpr1500/iar/WPR1500_REF/WPR1500_REF.eww
2. Build a project.
Click on the “Rebuild All” button:
Figure 10. Building a project

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Getting Started
When the build is complete, the IAR displays this information in the build window:
Figure 11. Successfull build of a project
3. Ensure that the debugger is configured properly in the project options.
Select the flash loader to support downloading of the binary to the internal flash:
Figure 12. Flash loader configuration

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Getting Started
When using J-Link as a debugger, select J-link/J-Trace:
Figure 13. J-Link debugger configuration for driver
When using P&E Multilink as a debugger, select the PE micro:
Figure 14. P&E Multilink debugger configuration for driver