NXP Semiconductors WPR1500-BUCK User manual

NXP Semiconductors

User’s Guide

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

WPR1500-BUCK MP Receiver V2.1 Reference Design User’s Guide, Rev. 0, 09/2016

2NXP Semiconductors

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

Mobile Device

Receiver

Transmitter

Load

System

Power

Power Conversion Power Pick-up

Control

Messages

CommComm

Mod

DeMod

Messages

DeMod

Mod

WPR1500-BUCK MP Receiver V2.1 Reference Design User’s Guide, Rev. 0, 09/2016

NXP Semiconductors 3

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

WPR1500-BUCK MP Receiver V2.1 Reference Design User’s Guide, Rev. 0, 09/2016

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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.

WPR1500-BUCK MP Receiver V2.1 Reference Design User’s Guide, Rev. 0, 09/2016

NXP Semiconductors 5

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

WPR1500-BUCK MP Receiver V2.1 Reference Design User’s Guide, Rev. 0, 09/2016

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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.



WPR1500-BUCK MP Receiver V2.1 Reference Design User’s Guide, Rev. 0, 09/2016

NXP Semiconductors 7

Getting Started

Figure 8. J-Link debugger plugged in

Figure 9. P&E Multilink debugger plugged in

WPR1500-BUCK MP Receiver V2.1 Reference Design User’s Guide, Rev. 0, 09/2016

8NXP Semiconductors

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

WPR1500-BUCK MP Receiver V2.1 Reference Design User’s Guide, Rev. 0, 09/2016

NXP Semiconductors 9

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

WPR1500-BUCK MP Receiver V2.1 Reference Design User’s Guide, Rev. 0, 09/2016

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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

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