NXP WPR1500-HV Wireless Charging Receiver User Guide

: October 27, 2023
: NXP

Table of Contents

NXP WPR1500-HV Wireless Charging Receiver
Introduction
System Features
Abbreviations
Package Checklist
System Block Diagram
Hardware Description
Getting Started
Testing
References
Revision History
Legal information
Read User Manual Online (PDF format)
Download This Manual (PDF format)

NXP WPR1500-HV Wireless Charging Receiver

Introduction

This document describes how to use WPR1500-HV receiver reference board designed by NXP. It supports 15W EPP output according to the WPC Qi V1.2.4 specification, and can be extended to support new V1.3.x specification. The power level can also be extended with special TX to up to 30 W. It is a low- cost reference solution that can be easily customized through the FreeMASTER tool.

System Features

The WPR1500 EPP receiver reference board has the following features:

Compliant with the EPP WPC Qi V1.2.4 specification, can be extended to V1.3.x.
Input voltage (3.5 V – 20 V AC peak) from the transmitter through the receiver coil.
Output voltage range can be set from 3.5 V to 20 V.
Default output power 15W(12V@1.25A), can be extended up to 30W(20V@1.5A).
Supports FSK communication with EPP transmitter.
Hardware protection of rectifier voltage, output voltage, and output current.
FreeMASTER tool to enable customization and calibration.

Abbreviations

The following table provides the abbreviation descriptions in this document.

Table 1. Abbreviations

Package Checklist

Table 2. Package checklist

Name| Count
WPR1500-HV Receiver board| 1

System Block Diagram

The following figure shows the WPR1500 EPP receiver wireless charging system.

NXP WPR1500-HV Wireless Charging Receiver 1

Obtain the WPC Qi information from: www.wirelesspowerconsortium.com/developers/.

Hardware Description

Reference Board Block Diagram

NXP WPR1500-HV Wireless Charging Receiver 2

Modules explanation

NXP WPR1500-HV Wireless Charging Receiver 3

The NXP MWPR1516 chip is the central controller of the WPR1500-HV receiver board. The chip higher integration receiver controller MCU for wireless power transfer application. The WPR15xx is a 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 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 a self-driven sync type. Its characteristics are:

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 module.

Getting Started

System developing environment
WPR1500-HV receiver board supports debugging with IAR and FreeMASTER tools. The following figure shows the setup of the debug connection. To download an image onto the WPR1516 chip, connect a debugger (J-LINK or P&E-Multilink FX) to the JTAG port of the receiver board. J3 (V_REC) and J5 (GND) on the board need to be connected to 5 – 12 V DC power supply in order to get power. To monitor the working status of the WPR1500-HV receiver board by FreeMASTER, remove the external power before putting the WPR1500-HV receiver board on the transmitter panel. The following figure shows the connection when downloading an image.

NXP WPR1500-HV Wireless Charging Receiver 4

The following figure shows the connections when the user needs to monitor the working status by FreeMASTER.

NXP WPR1500-HV Wireless Charging Receiver 5

For details on the J-LINK debugger, visit nxp.com and search for “J-Link”.

Downloading and debugging firmware
Downloading an existing WPR1500 HVOUT project with IAR

To download an existing WPR1500 project using IAR, perform the following steps:

Set the IAR Embedded Workbench: The IAR embedded Workbench Tool is required. The IAR version should be 9.10.2 or higher. Because the receiver driver library is already included in the library 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.
Build a project: Click the “Rebuild All” button.
Ensure that the debugger is configured properly in the project options. The flash loader must be selected to support downloading of the binary to the internal flash.
When using the J-Link as the debugger, select J-link/J-Trace.
Download the project. After the application is built successfully, click the “Download and Debug” button to download the application to the target device.
The following figure shows the programming of a project.
After the application is downloaded to the target device, the debugger stops executing at the start of the main function:

Debugging with FreeMASTER

Connecting the Debugging cable
The FreeMASTER debug connection uses J-Link, as shown in the following figure. The J-Link tool can be connected through the connector J1. The FreeMASTER version should be V3.1 or higher.

NXP WPR1500-HV Wireless Charging Receiver 13

FreeMASTER project options setting

Set the symbol file for your project. Select the symbol file in FreeMASTER Project â€“> Options â€“> MAP Files, as shown below.
Select the communication interface for Freemaster: Select “Plug-in Module” in Freemaster Project –> Options –> Comm as shown below. Then select “FreeMASTER Segger/Jlink Communication Plug-in”.

NXP WPR1500-HV Wireless Charging Receiver 15

Debugging with FreeMASTER
NXP provides the FreeMASTER GUI tool for system working status monitor. The following figure shows the FreeMASTER GUI Tool. Users need to open WPR1500_HVOUT.pmp with this tool and then click the red Start/Stop button. For the FreeMASTER tool, visit nxp.com/Freemaster.

NXP WPR1500-HV Wireless Charging Receiver 16

Testing

Signals on the Board
The following figure shows the main signals on the WPR1500-HV EPP receiver board.

NXP WPR1500-HV Wireless Charging Receiver 17

The following table lists the testing points on the WPR1500 BUCK board.

Table 3. Test Points list

The following examples show how to measure and debug the board. The following figure shows the input voltage and communication signal from the ping phase to power transfer setup. The loading is 10.5W(12V@0.875A)

Channel 1: Rectifier voltage VREC
Channel 2: Output current I_out
Channel 3: Output voltage V_out
Channel 4: Communication signal CTX

NXP WPR1500-HV Wireless Charging Receiver 18

The following figure shows the load step and load dump from 7.5W(12V@0.625A) to 15W(12V@1.25A).

Channel 1: Rectifier voltage VREC
Channel 2: Output current I_out
Channel 3: Output voltage V_out

NXP WPR1500-HV Wireless Charging Receiver 19

References

NXP wireless charging solution page: nxp.com/products/power-management/wireless-charging-ics
NXP Freemaster tool page: nxp.com/products/power-management/wireless-charging-ics/freemaster-run-time-debugging-tool:FREEMASTER
WPC page: www.wirelesspowerconsortium.com

Revision History

Revision number	Date	Substantive changes
GA 3.0	07/2022	Initial release.

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