MCP8025 TQFP
BLDC Motor Driver
Evaluation Board
User’s Guide
2014 Microchip Technology Inc.
DS50002307A
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Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
FlashFlex, flexPWR, JukeBlox, KEELOQ, KEELOQ logo, Kleer,
LANCheck, MediaLB, MOST, MOST logo, MPLAB,
OptoLyzer, PIC, PICSTART, PIC32 logo, RightTouch, SpyNIC,
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The Embedded Control Solutions Company and mTouch are
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Analog-for-the-Digital Age, BodyCom, chipKIT, chipKIT logo,
CodeGuard, dsPICDEM, dsPICDEM.net, ECAN, In-Circuit
Serial Programming, ICSP, Inter-Chip Connectivity, KleerNet,
KleerNet logo, MiWi, MPASM, MPF, MPLAB Certified logo,
MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code
Generation, PICDEM, PICDEM.net, PICkit, PICtail,
RightTouch logo, REAL ICE, SQI, Serial Quad I/O, Total
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© 2014, Microchip Technology Incorporated, Printed in the
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ISBN: 978-1-63276-624-3
QUALITY MANAGEMENT SYSTEM
CERTIFIED BY DNV
== ISO/TS 16949 ==
DS50002307A-page 2
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
2014 Microchip Technology Inc.
Object of Declaration: MCP8025 TQFP BLDC Motor Driver Evaluation Board
VP Development Tools
2014 Microchip Technology Inc.
DS20002307A-page 3
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
NOTES:
DS20002307A-page 4
2014 Microchip Technology Inc.
MCP8025 TQFP BLDC MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Table of Contents
Preface ........................................................................................................................... 7
Introduction............................................................................................................ 7
Document Layout .................................................................................................. 7
Conventions Used in this Guide ............................................................................ 8
Recommended Reading........................................................................................ 9
The Microchip Web Site ........................................................................................ 9
Development Systems Customer Change Notification Service .......................... 10
Customer Support ............................................................................................... 10
Document Revision History ................................................................................. 10
Chapter 1. Product Overview
1.1 Introduction ................................................................................................... 11
1.2 What is the MCP8025 TQFP BLDC Motor Driver Evaluation Board? .......... 12
1.3 What Does the MCP8025 TQFP BLDC Motor Driver
Evaluation Board Kit Include? ................................................................ 12
Chapter 2. Installation and Operation
2.1 Introduction ................................................................................................... 13
2.2 Features ....................................................................................................... 13
2.3 Getting Started ............................................................................................. 14
2.3.1 Connections .............................................................................................. 14
2.3.2 Operating a Motor ..................................................................................... 17
2.3.3 Indicator LEDs ........................................................................................... 17
2.3.4 Test Points ................................................................................................ 17
2.3.5 Reprogramming the On-Board dsPIC33EP256MC504 ............................. 19
2.3.6 Configuring the MCP8025 ......................................................................... 19
2.3.7 MCP8025 Configuration Message Responses .......................................... 21
2.3.8 MCP8025 Status Messages ...................................................................... 23
2.3.9 MCP8025 Register Definitions .................................................................. 24
Appendix A. Schematic and Layouts
A.1 Introduction .................................................................................................. 29
A.2 Board – Schematic ....................................................................................... 30
A.3 Board – Top Silk Layer ................................................................................ 31
A.4 Board – Top Metal Layer ............................................................................. 32
A.5 Board – Mid1 Metal Layer ............................................................................ 33
A.6 Board – Mid2 Metal Layer ............................................................................ 34
A.7 Board – Bottom Metal Layer ........................................................................ 35
2014 Microchip Technology Inc.
DS50002307A-page 5
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
Appendix B. Bill of Materials
Appendix C. Software
C.1 Software Location ........................................................................................ 41
C.2 Selected Software Constants and Definitions .............................................. 41
C.3 dsPIC33EP256MC504 PIM Port Usage ...................................................... 43
C.3.1 Port A Mapping ..........................................................................................43
C.3.2 Port B Mapping ..........................................................................................43
C.3.3 Port C Mapping .........................................................................................44
C.3.4 A/D Mappings ............................................................................................44
C.4 Communications Message Mappings .......................................................... 44
C.5 MPLAB®X Compiler Startup ........................................................................ 45
C.6 MPLAB X IDE and PICkit™ 3 Exercise ........................................................ 45
Worldwide Sales and Service .....................................................................................47
DS50002307A-page 6
2014 Microchip Technology Inc.
MCP8025 TQFP BLDC MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Preface
NOTICE TO CUSTOMERS
All documentation becomes dated, and this manual is no exception. Microchip tools and
documentation are constantly evolving to meet customer needs, so some actual dialogs
and/or tool descriptions may differ from those in this document. Please refer to our web site
(www.microchip.com) to obtain the latest documentation available.
Documents are identified with a “DS” number. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXXXXXXXXA”, where “XXXXXXXX” is the document number and “A” is the revision level
of the document.
For the most up-to-date information on development tools, see the MPLAB® IDE online help.
Select the Help menu, and then Topics to open a list of available online help files.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
MCP8025 TQFP BLDC Motor Driver Evaluation Board. Items discussed in this chapter
include:
•
•
•
•
•
•
Document Layout
Conventions Used in this Guide
Recommended Reading
The Microchip Web Site
Customer Support
Document Revision History
DOCUMENT LAYOUT
This document describes how to use the MCP8025 TQFP BLDC Motor Driver
Evaluation Board as a development tool to emulate and debug firmware on a target
board. The manual layout is as follows:
• Chapter 1. “Product Overview” – Important information about the MCP8025
TQFP BLDC Motor Driver Evaluation Board.
• Chapter 2. “Installation and Operation” – Includes instructions on how to get
started with this user’s guide and a description of the user’s guide.
• Appendix A. “Schematic and Layouts” – Shows the schematic and layout
diagrams for the MCP8025 TQFP BLDC Motor Driver Evaluation Board.
• Appendix B. “Bill of Materials” – Lists the parts used to build the MCP8025
TQFP BLDC Motor Driver Evaluation Board.
• Appendix C. “Software” – Provides information about the application firmware
and where the source code can be found.
2014 Microchip Technology Inc.
DS50002307A-page 7
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description
Arial font:
Italic characters
Initial caps
Quotes
Underlined, italic text with
right angle bracket
Bold characters
N‘Rnnnn
Text in angle brackets < >
Courier New font:
Plain Courier New
Represents
Referenced books
Emphasized text
A window
A dialog
A menu selection
A field name in a window or
dialog
A menu path
MPLAB® IDE User’s Guide
...is the only compiler...
the Output window
the Settings dialog
select Enable Programmer
“Save project before build”
A dialog button
A tab
A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
A key on the keyboard
Click OK
Click the Power tab
4‘b0010, 2‘hF1
Italic Courier New
Sample source code
Filenames
File paths
Keywords
Command-line options
Bit values
Constants
A variable argument
Square brackets [ ]
Optional arguments
Curly brackets and pipe
character: { | }
Ellipses...
Choice of mutually exclusive
arguments; an OR selection
Replaces repeated text
Represents code supplied by
user
DS50002307A-page 8
Examples
File>Save
Press <Enter>, <F1>
#define START
autoexec.bat
c:\mcc18\h
_asm, _endasm, static
-Opa+, -Opa0, 1
0xFF, ‘A’
file.o, where file can be
any valid filename
mcc18 [options] file
[options]
errorlevel {0|1}
var_name [,
var_name...]
void main (void)
{ ...
}
2014 Microchip Technology Inc.
Preface
RECOMMENDED READING
This user's guide describes how to use the MCP8025 TQFP BLDC Motor Driver
Evaluation Board. Other useful documents are listed below. The following Microchip
documents are available and recommended as supplemental reference resources.
• MCP8025 – “3-Phase Brushless DC (BLDC) Motor Gate Driver with Power
Module” (DS20005339) — This data sheet provides detailed information
regarding the MCP8025 product family.
• dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X and
PIC24EPXXXGP/MC20X – “16-Bit Microcontrollers and Digital Signal
Controllers with High-Speed PWM, Op Amps and Advanced Analog”
(DS70000657) — This data sheet provides detailed information regarding the
dsPIC33EP256MC504 product family.
• “dsPIC33E/PIC24E Family Reference Manual” (DS70573)
• “dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X, and
PIC24EPXXXGP/MC20X Family Silicon Errata and Data Sheet Clarification”
(DS80000533G) — This data sheet contains anomalies and clarifications for the
dsPIC33EPXXXMC504 processor.
• AN1078 – “Sensorless Field Oriented Control of a PMSM” (DS01078)
• AN1160 – “Sensorless BLDC Control with Back-EMF Filtering Using a
Majority Function” (DS01160)
• AN992 – “Sensorless BLDC Motor Control Using dsPIC30F2010” (DS00992)
• AN1292 – “Sensorless Field Oriented Control (FOC) for a Permanent Magnet
Synchronous Motor (PMSM) Using a PLL Estimator and Field Weakening
(FW)” (DS01292)
• AN901 – “Using the dsPIC30F for Sensorless BLDC Control” (DS00901)
THE MICROCHIP WEB SITE
Microchip provides online support via our web site at www.microchip.com. This web
site is used as a means to make files and information easily available to customers.
Accessible by using your favorite Internet browser, the web site contains the following
information:
• Product Support – Data sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives
2014 Microchip Technology Inc.
DS50002307A-page 9
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
DEVELOPMENT SYSTEMS CUSTOMER CHANGE NOTIFICATION SERVICE
Microchip’s customer notification service helps keep customers current on Microchip
products. Subscribers will receive an e-mail notification whenever there are changes,
updates, revisions or errata related to a specified product family or development tool of
interest.
To register, access the Microchip web site at www.microchip.com, click on Customer
Change Notification and follow the registration instructions.
The Development Systems product group categories are:
• Compilers – The latest information on Microchip C compilers, assemblers, linkers
and other language tools. These include all MPLAB C compilers; all MPLAB
assemblers (including MPASM assembler); all MPLAB linkers (including MPLINK
object linker); and all MPLAB librarians (including MPLIB object librarian).
• Emulators – The latest information on Microchip in-circuit emulators.This
includes the MPLAB REAL ICE™ and MPLAB ICE 2000 in-circuit emulators.
• In-Circuit Debuggers – The latest information on the Microchip in-circuit
debuggers. This includes MPLAB ICD 3 in-circuit debuggers and PICkit 3 Debug
Express.
• MPLAB IDE – The latest information on Microchip MPLAB IDE, the Windows
Integrated Development Environment for development systems tools. This list is
focused on the MPLAB IDE, MPLAB IDE Project Manager, MPLAB Editor and
MPLAB SIM simulator, as well as general editing and debugging features.
• Programmers – The latest information on Microchip programmers. These include
production programmers such as MPLAB REAL ICE in-circuit emulator, MPLAB
ICD 3 in-circuit debugger and MPLAB PM3 device programmers. Also included
are nonproduction development programmers such as PICSTART Plus and PICkit
2 and 3 programmers.
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Customers should contact their distributor, representative or field application engineer
(FAE) for support. Local sales offices are also available to help customers. A listing of
sales offices and locations is included in the back of this document.
Technical support is available through the web site at:
http://www.microchip.com/support.
DOCUMENT REVISION HISTORY
Revision A (September 2014)
• Initial Release of this Document.
DS50002307A-page 10
2014 Microchip Technology Inc.
MCP8025 TQFP BLDC MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
The MCP8025 TQFP BLDC Motor Driver Evaluation Board is used to demonstrate the
drive capabilities of the MCP8025. The board uses the MCP8025 3-Phase Brushless
DC (BLDC) motor gate driver and dsPIC33EP256MC504 processor to implement a
6-step trapezoidal BLDC motor controller.
The MCP8025 TQFP BLDC Motor Driver Evaluation Board is used to evaluate
Microchip’s MCP8025 in a BLDC motor application. As provided, the MCP8025 TQFP
BLDC Motor Driver Evaluation Board is ready to operate a BLDC motor using one
on-board push button to start and stop the motor plus one on-board potentiometer to
set motor speed. The evaluation board can drive a BLDC motor with a supply voltage
of up to 19V and a motor current up to 15 amps. The MCP8025 TQFP BLDC Motor
Driver Evaluation Board provides a 6-step trapezoidal control algorithm along with a
750 mW buck converter, 5V and 12V LDO, high-to-low level voltage translators, current
sense operational amplifiers, LIN transceiver and Hall-effect inputs. The evaluation
board provides a status indication for the power supplies and the six on-board
Pulse-Width Modulation (PWM) inputs.
This chapter covers the following topics:
• What is the MCP8025 TQFP BLDC Motor Driver Evaluation Board?
• What does the MCP8025 TQFP BLDC Motor Driver Evaluation Board Kit include?
6V to 19V
Power Supply
+
-
MCP8025 Evaluation Board
Phase B
dsPIC33EP256MC504
Phase C
FIGURE 1-1:
Diagram.
2014 Microchip Technology Inc.
BLDC Motor
Phase A
MCP8025 TQFP BLDC Motor Driver Evaluation Board Block
DS50002307A-page 11
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
1.2
WHAT IS THE MCP8025 TQFP BLDC MOTOR DRIVER EVALUATION
BOARD?
The MCP8025 TQFP BLDC Motor Driver Evaluation Board is a complete stand-alone
motor controller for brushless DC motors (BLDC). The board is capable of driving a
three-phase brushless DC motor rated at up to 15 amps and 19V. The input voltage
range for the board is 6V to 19V. The on board MCP8025 generates 5V and 12V using
internal voltage regulators. The MCP8025 also contains an internal buck regulator
which generates the power for the attached dsPIC33EP256MC504 host
microcontroller.
An input terminal block is provided to apply the input voltage to the board. An output
header and plated Printed Circuit Board (PCB) through-hole pads are also provided as
a means to connect the external motor. Two programming headers are available for
updating the firmware contained in the dsPIC33EP256MC504 using either a PICkit 3
programmer/debugger or an MPLAB® ICD3 in-circuit debugger.
An input terminal block is also supplied on the board to allow users to create LIN communication connections to the MCP8025 LIN transceiver.
1.3
WHAT DOES THE MCP8025 TQFP BLDC MOTOR DRIVER EVALUATION
BOARD KIT INCLUDE?
This MCP8025 TQFP BLDC Motor Driver Evaluation Board kit includes:
• The MCP8025 TQFP BLDC Motor Driver Evaluation Board, ADM00600
• Information Sheet
DS50002307A-page 12
2014 Microchip Technology Inc.
MCP8025 TQFP BLDC MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The MCP8025 TQFP BLDC Motor Driver Evaluation Board demonstrates Microchip’s
3-Phase Brushless DC (BLDC) Motor Gate Driver with Power Module, MCP8025, used
in a BLDC motor drive application. When used in conjunction with a microcontroller, the
MCP8025 will provide the necessary drive signals to drive for a 3-Phase BLDC motor.
The MCP8025 contains the high-side and low-side drivers for external N-channel
MOSFETs. A dsPIC33EP256MC504 processor is used to supply the PWM inputs to the
MCP8025 as well as handle the high-speed Analog-To-Digital Conversion (ADC)
required for 50 kHz PWM operation.
The MCP8025 UART interface is used to configure the MCP8025 device and to send
fault information to the dsPIC® Digital Signal Controller (DSC). The evaluation board
firmware, available on the Microchip web site, uses a 6-step trapezoidal drive control
algorithm to demonstrate the MCP8025 capabilities.
2.2
FEATURES
The MCP8025 TQFP BLDC Motor Driver Evaluation Board has the following features:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Input Operating Voltage Range: +6.0V to +19V
Maximum of 500 mA of gate drive current for external N-Channel MOSFETs
Drives up to a 15A BLDC motor
750 mW Buck Regulator with resistor-programmable output voltage
ON/OFF momentary contact switch
Reset momentary contact switch
Spare user-programmable momentary contact switch
PWM signal LED indicators
PICkit 3 and MPLAB ICD 3 debugger interfaces
Speed control potentiometer
Terminal block for 5V and 12V Hall-effect sensors
LIN terminal block for user communications use
Programmable external MOSFET overcurrent protection
Programmable PWM dead-time protection
Programmable PWM blanking time for current switching spikes
Complete “C” source code (provided on the board web page)
2014 Microchip Technology Inc.
DS50002307A-page 13
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
2.3
GETTING STARTED
The MCP8025 TQFP BLDC Motor Driver Evaluation Board is fully assembled and
tested for driving a BLDC motor. This board requires the use of an external voltage
source capable of supplying 6V to 19V at the rated motor current. A BLDC motor is also
required to evaluate the motor driver.
FIGURE 2-1:
MCP8025 TQFP BLDC Motor Driver Evaluation Board PCB.
2.3.1
Connections
2.3.1.1
JUMPER SETTINGS
The MCP8025 TQFP BLDC Motor Driver Evaluation Board has several
user-configurable jumpers. The jumpers are described in Table 2-1 below.
TABLE 2-1:
MCP8025 TQFP BLDC MOTOR DRIVER EVALUATION BOARD
JUMPERS
Jumper
DS50002307A-page 14
Default
Position
Description
JP1
OFF
ON
Enable LIN Bus 1 kΩ pull up
JP2
ON
ON
Enable LIN Bus 220 pF capacitor
JP7
2-3
JP8 (MONITOR1)
JP9 (MONITOR2)
JP10 (MONITOR3)
3-4
JP11
1-2
1-2
CE 47 kΩ pull up to +3.3V
2-3
CE 47 kΩ pull down to DGND
1-2
Connect phase current to MONITORn
3-4
Connect filtered phase to MONITORn
5-6
Connect Hall Sensor to MONITORn
1-2
Supplies 5V to the Hall Sensors
2-3
Supplies 12V to the Hall Sensors
2014 Microchip Technology Inc.
Installation and Operation
TABLE 2-1:
MCP8025 TQFP BLDC MOTOR DRIVER EVALUATION BOARD
JUMPERS (CONTINUED)
Jumper
JP12
Default
1-2
JP13
OFF
2.3.1.1.1
Position
Description
1-2
Current Sense offset = JP13 selection
2-3
Current Sense offset = 0.0V
ON
Current Sense reference = 1.651V
OFF
Current Sense reference = 0.992V
The jumpers and their use are described in Table 2-2.
TABLE 2-2:
Jumper
JUMPER DESCRIPTION
Name
Position
Description
JP1
LIN Bus Master
Select Resistor
ON
Connects 1K resistor from terminal block J3-2
(LIN Bus) to LIN terminal block J3-1 (LIN VBAT)
JP2
LIN Bus Capacitor
ON
Connects 220 pF capacitor from terminal block
J3-2 (LIN Bus) to LIN terminal block J3-3
(LIN GND)
1-2
Connects CE pin to +3.3V through 47K pull-up
resistor
2-3
Connects CE pin to DGND through 47K pull-up
resistor
1-2
Connects Phase A Current to Monitor 1 net
3-4
Connects Filtered Phase A Voltage to
MONITOR1 net
5-6
Connects Hall Sensor A to Monitor 1 net
1-2
Connects Phase B Current to Monitor 2 net
3-4
Connects Filtered Phase B Voltage to
MONITOR2 net
5-6
Connects Hall Sensor B to Monitor 2 net
1-2
Connects Phase C Current to Monitor 3 net
3-4
Connects Filtered Phase C Voltage to
MONITOR3 net
5-6
Connects Hall Sensor C to Monitor 3 net
1-2
Supplies 5V to the Hall Sensors
JP7
MCP8025 CE
JP8
Monitor 1 Input
Selection
(A/D Channel AN0)
JP9
JP10
JP11
JP12
JP13
2014 Microchip Technology Inc.
Monitor 2 Input
Selection
(A/D Channel AN1)
Monitor 3 Input
Selection
(A/D Channel AN2)
—
—
—
2-3
Supplies 12V to the Hall Sensors
1-2
Current Sense Offset Voltage = JP13 selection
3-4
Current Sense Offset Voltage = 0.0V
1-2
Current Sense Reference Voltage = 1.651V
3-4
Current Sense Reference Voltage = 0.992V
DS50002307A-page 15
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
The jumper settings for use with the sensorless trapezoidal drive firmware are as
described in Table 2-3.
TABLE 2-3:
JUMPERS USED BY SENSORLESS TRAPEZOIDAL FIRMWARE
Jumper
Position
Description
JP7
2-3
Enable 47 kΩ CE pull down to DGND
JP8 (MONITOR1)
JP9 (MONITOR2)
JP10 (MONITOR3)
3-4
Connect filtered phase voltage to MONITORn
2.3.1.2
POWERING THE MCP8025 TQFP BLDC MOTOR DRIVER EVALUATION
BOARD (REFERENCE Figure 2-2)
1. Apply the input voltage to the input power terminal block, J4. The input voltage
source should be limited to the 0V to +19V range. For nominal operation the input
voltage should be between +6.0V and +19V.
2. Connect the positive side of the input power source (+) to pin 2 of J4. Connect
the negative or return side (-) of the input source to pin 1 of J4. Refer to
Figure 2-2.
J4
Input
Power
VDD
GND
J3
LIN
U5
MCP8025
U4
dsPIC®
DSC
J5
Motor
Connections
J2
ICD3
Header
PICkit™
Debugger
Header
J1
FIGURE 2-2:
Speed
Adjust
R96
RUN
Switch
SW2
RESET
Switch
Connection and Operation Diagram.
2.3.1.3
CONNECTING A MOTOR TO THE MCP8025 TQFP BLDC MOTOR
DRIVER EVALUATION BOARD
Connect each phase winding of a three-phase BLDC motor to the appropriate terminal
of the motor terminal block, J5, terminals A,B,C. The neutral winding, terminal N, is not
necessary for the sensorless trapezoidal drive firmware provided for the evaluation
board.
DS50002307A-page 16
2014 Microchip Technology Inc.
Installation and Operation
2.3.2
Operating a Motor
1. Turn the speed adjust potentiometer (R96) fully counter-clockwise to obtain the
slowest speed setting. Now turn the speed adjust approximately ¼ turn
clockwise to allow for 25% motor speed.
2. Turn on the power supply.
3. Press and release the RUN switch (SW2) to start the motor.
4. Turn the Speed Adjust potentiometer clockwise to increase motor speed,
counter-clockwise to decrease motor speed. The Speed Adjust changes the
PWM duty cycle of the PWM signals being sent to the MCP8025.
5. Press and release the RUN switch again to stop the motor.
2.3.3
Indicator LEDs
The MCP8025 TQFP BLDC Motor Driver Evaluation Board has ten LEDs to indicate
system status. Table 2-4 lists the LED indicators and their descriptions.
TABLE 2-4:
PCB Location
LED INDICATORS
Name
Description
D17
SPARE
D18
+12V
+12V LDO voltage operating
D19
+5V
+5V LDO voltage operating
D20
+Buck
D21
PWM3H
PWM Phase 3 high-side input to MCP8025
D22
PWM3L
PWM Phase 3 low-side input to MCP8025
D23
PWM2H
PWM Phase 2 high-side input to MCP8025
D24
PWM2L
PWM Phase 2 low-side input to MCP8025
D25
PWM1H
PWM Phase 1 high-side input to MCP8025
D26
PWM1L
PWM Phase 1 low-side input to MCP8025
2.3.4
Spare LED on dsPIC DSC RA4 port
+3.3V Buck output voltage operating
Test Points
There are several test points on the board to allow probing of voltages, currents and
signals. An abridged listing is shown in Table 2-5.
TABLE 2-5:
Test Point
TEST POINTS DESCRIPTION
Name
Description
TP1
VDD
TP2
PGND
TP3
DE2
MCP8025 DE2 communications signal
TP4
PHA
Motor Phase A connection
TP5
PHB
Motor Phase B connection
TP6
PHC
Motor Phase C connection
TP7
PGND
Power supply ground (-)
TP8
PGND
Power supply ground (-)
TP9
PGND
Power supply ground (-)
TP10
LIN GND
LIN Bus ground connection
TP11
LIN +12V
LIN Bus +12V supply connection
2014 Microchip Technology Inc.
Power supply (+)
Power supply ground (-)
DS50002307A-page 17
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
TABLE 2-5:
Test Point
FAULTn/TXE
Name
FAULTn/TXE
Description
LIN Fault/Transmit enable signal
ILIMIT
ILIMIT
ILIMIT_OUT signal from MCP8025
LIN RX
LIN RX
Received data from LIN transceiver
LIN TX
LIN TX
Transmitted data to LIN transceiver
MON1
MON1
Monitor Signal 1: connects to A/D input AN0
MON2
MON2
Monitor Signal 2: connects to A/D input AN1
MON3
MON3
Monitor Signal 3: connects to A/D input AN2
MON4
MON4
Monitor Signal 4: connects to A/D input AN5
NEU_FIL
OVP CLAMP
NEU_FIL
OVP CLAMP
Filtered neutral signal
Gate pin of supply overvoltage clamp
PHA_FIL
PHA_FIL
Filtered Phase A signal
PHB_FIL
PHB_FIL
Filtered Phase B signal
PHC_FIL
PHC_FIL
Filtered Phase C signal
POT
POT
Speed adjust potentiometer. Clockwise increases PWM
duty cycle (speed), counter-clockwise decreases PWM
duty cycle (speed).
PWM1H
PWM1H
PWM phase A high-side input to MCP8025
PWM1L
PWM1L
PWM phase A low-side input to MCP8025
PWM2H
PWM2H
PWM phase B high-side input to MCP8025
PWM2L
PWM2L
PWM phase B low-side input to MCP8025
PWM3H
PWM3H
PWM phase C high-side input to MCP8025
PWM3L
PWM3L
PWM phase C low-side input to MCP8025
Q1G
Q1G
Phase A high-side MOSFET gate
Q2G
Q2G
Phase B high-side MOSFET gate
Q3G
Q3G
Phase C high-side MOSFET gate
Q4G
Q4G
Phase C low-side MOSFET gate
Q5G
Q5G
Phase B low-side MOSFET gate
Q6G
Q6G
Phase A low-side MOSFET gate
RA2
RA2
dsPIC DSC spare I/O pin
RA3
RA3
dsPIC DSC spare I/O pin
RA10
RA10
dsPIC DSC spare I/O pin
RC8
RC8
dsPIC DSC spare I/O pin
RC9
RC9
dsPIC DSC spare I/O pin
V_BUCK
Buck 3.3V output voltage
V_BUCK
DS50002307A-page 18
TEST POINTS DESCRIPTION (CONTINUED)
2014 Microchip Technology Inc.
Installation and Operation
2.3.5
Reprogramming the On-Board dsPIC33EP256MC504
The on-board dsPIC33EP256MC504 may be reprogrammed with the user’s desired
firmware. The processor may be programmed by using an external power source and
either a PICkit 3, MPLAB REAL ICE in-circuit emulator or MPLAB ICD3 programmer.
1. Connect the power source to the board as explained in Section 2.3.1.2.
2. Connect a PICkit 3 to the J1 header or connect an MPLAB ICD 3 or MPLAB
REAL ICE in-circuit emulator to the J2 (RJ25) jack.
3. Startup up the MPLABX Integrated Development Environment (IDE) and load the
MCP8025 TQFP BLDC Motor Driver Evaluation Board firmware project.
Note:
Note that the following project options may need to be changed for the
computer being used to build the firmware:
• Add Library libdsp-elf.a located in XC16 ???\src\Libdsp\lib
directory.
• Add XC16-as ASM Include Directory in XC16 ???\src\Libdsp\asm.
• Set Hardware tool to “ICD 3”, “REAL ICE”, or “PICkit3”.
4. Build the project.
5. Program the device.
6. Press the RESET switch on the board to reset the processor and allow the
processor to execute the new firmware program.
2.3.6
Configuring the MCP8025
The MCP8025 has configuration registers that may be used to modify operating
parameters of the device. The parameters are modified by sending commands to the
MCP8025 using the DE2 communication bus. The DE2 communication bus is a
half-duplex, 9600 baud, 8-bit, 1-stop bit, 1-start bit, no parity, serial communication link.
The user may add code to the evaluation board firmware to communicate with the
registers. The evaluation board software contains a subroutine which initializes the
MCP8025 registers.
There are three configuration registers that may be written to. The registers are written
to by sending a SET_CFG_X command byte followed by the desired register value byte.
The configuration messages and their respective requests are listed in Table 2-6.
2014 Microchip Technology Inc.
DS50002307A-page 19
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
TABLE 2-6:
Command
SET_CFG_0
CONFIGURATION MESSAGE COMMANDS
Byte
Bit
1
2
Value
Description
10000001b (81H) Set Configuration Register 0
7
0
Reserved
6
—
(Always ‘0’ in SLEEP mode)
0
Enable disconnect of 30 kΩ LIN Bus pull up when CE = 0 (Default)
5
4
3
1
Disable disconnect of 30 kΩ LIN Bus pull up when CE = 0
0
System enters Standby mode when CE = 0
1
System enters Sleep mode when CE = 0
30 kΩ LIN Bus pull up disconnect always enabled
0
Disable internal neutral simulator (Default)
1
Enable internal neutral simulator
0
Enable MOSFET Undervoltage Lockout (Default)
1
Disable MOSFET Undervoltage Lockout
2
0
Enable external MOSFET short circuit detection (Default)
1
Disable external MOSFET short circuit detection
1:0
00
Set external MOSFET overcurrent limit to 0.250V (Default)
01
Set external MOSFET overcurrent limit to 0.500V
10
Set external MOSFET overcurrent limit to 0.750V
11
Set external MOSFET overcurrent limit to 1.000V
GET_CFG_0
1
10000010 (82H)
Get Configuration Register 0
SET_CFG_1
1
10000011 (83H)
Set Configuration Register 1
DAC motor current limit reference voltage
2
GET_CFG_1
1
SET_CFG_2
1
2
7:0
10000100 (84H)
10000111 (87H)
7:5
4:2
1:0
GET_CFG_2
1
DS50002307A-page 20
00H – FFH
00H
—
Select DAC Current Reference value
(4.503V - 0.991V)/ 255 = 13.77 mV/bit
00H = 0.991 volts
40H = 1.872 volts (40H x 0.1377 mV/bit + 0.991V) (Default)
FFH = 4.503 volts (FFH x 0.1377 mV/bit + 0.991V)
Get Configuration Register 1
Get DAC motor current limit reference voltage
Set Configuration Register 2
Reserved
Driver Dead Time (For PWMH /PWML inputs)
000
2000 ns (Default)
001
1750 ns
010
1500 ns
011
1250 ns
100
1000 ns
101
750 ns
110
500 ns
111
250 ns
—
Driver blanking time (ignore switching current spikes)
00
4 µs (Default)
01
2 µs
10
1 µs
11
500 ns
10001000 (88H)
Get Configuration Register 2
2014 Microchip Technology Inc.
Installation and Operation
2.3.7
MCP8025 Configuration Message Responses
Table 2-7 describes the messages sent to host in response to a host command
message.
TABLE 2-7:
CONFIGURATION MESSAGE RESPONSES
MESSAGE
BYTE
BIT
SET_CFG_0
1
7:0
VALUE
DESCRIPTION
00000001 (01H) Set Configuration Register 0 Not Acknowledged (Response)
01000001 (41H) Set Configuration Register 0 Acknowledged (Response)
2
7
0
Reserved
6
—
(Ignored in SLEEP mode)
0
Enable disconnect of 30 kΩ LIN Bus pull up when CE = 0 (Default)
1
Disable disconnect of 30 kΩ LIN Bus pull up when CE = 0
0
System enters Standby mode when CE = 0
1
System enters Sleep mode when CE = 0, 30 kΩ LIN disconnect
always enabled
0
Internal neutral simulator disabled (Startup Default)
5
4
1
Internal neutral simulator enabled
3
0
1
Undervoltage Lockout enabled (Default)
Undervoltage Lockout disabled
2
0
External MOSFET overcurrent detection enabled (Default)
1
External MOSFET overcurrent detection disabled
1:0
GET_CFG_0
00
0.250V external MOSFET overcurrent limit (Default)
01
0.500V external MOSFET overcurrent limit
10
0.750V external MOSFET overcurrent limit
11
1.000V external MOSFET overcurrent limit
1
7:0
00000010 (02H) Get Configuration Register 0 Response Not Acknowledged
(Response)
2
7
0
Reserved
6
—
(Ignored in SLEEP mode)
0
Enable disconnect of 30 kΩ LIN Bus pull up when CE = 0 (Default)
01000010 (42H) Get Configuration Register 0 Response Acknowledged (Response)
5
4
3
2
1:0
2014 Microchip Technology Inc.
1
Disable disconnect of 30 kΩ LIN Bus pull up when CE = 0
0
System enters Standby mode when CE = 0
1
System enters Sleep mode when CE = 0, 30 kΩ LIN disconnect
always enabled
0
Internal neutral simulator disabled (Startup Default)
1
Internal neutral simulator enabled
0
Undervoltage Lockout enabled
1
Undervoltage Lockout disabled
0
External MOSFET overcurrent detection enabled
1
External MOSFET overcurrent detection disabled
00
0.250V external MOSFET overcurrent limit
01
0.500V external MOSFET overcurrent limit
10
0.750V external MOSFET overcurrent limit
11
1.000V external MOSFET overcurrent limit
DS50002307A-page 21
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
TABLE 2-7:
CONFIGURATION MESSAGE RESPONSES (CONTINUED)
MESSAGE
BYTE
SET_CFG_1
1
BIT
VALUE
DESCRIPTION
00000011 (03H) Set DAC Motor Current Limit Reference Voltage Not Acknowledged
(Response)
01000011 (43H) Set DAC Motor Current Limit Reference Voltage Acknowledged
(Response)
2
GET_CFG_1
7:0
1
00H – FFH
Current DAC Current Reference value 13.77 mV/bit + 0.991V
00000100 (04H) Get DAC Motor Current Limit Reference Voltage Not Acknowledged
(Response)
01000100 (44H) Get DAC Motor Current Limit Reference Voltage Acknowledged
(Response)
2
SET_CFG_2
7:0
1
00H – FFH
Current DAC Current Reference value 13.77 mV/bit + 0.991V
00000111 (07H) Set Configuration Register 2 Not Acknowledged (Response)
01000111 (47H) Set Configuration Register 2 Acknowledged (Response)
2
7:5
00H
4:2
—
1:0
GET_CFG_2
1
Reserved
Driver Dead Time (For PWMH /PWML inputs)
000
2000 ns (Default)
001
1750 ns
010
1500 ns
011
1250 ns
100
1000 ns
101
750 ns
110
500 ns
111
250 ns
—
Driver Blanking Time (ignore switching current spikes)
00
4 µs (Default)
01
2 µs
10
1 µs
11
500 ns
00001000 (08H) Get Configuration Register 2 Response Not Acknowledged
(Response)
01001000 (48H) Get Configuration Register 2 Response Acknowledged (Response)
2
7:5
4:2
00H
—
DS50002307A-page 22
Driver Dead Time (For PWMH /PWML inputs)
000
2000 ns (Default)
001
1750 ns
010
1500 ns
011
1250 ns
100
1000 ns
101
750 ns
110
500 ns
111
1:0
Reserved
250 ns
—
Driver Blanking Time (ignore switching current spikes)
00
4 µs (Default)
01
2 µs
10
1 µs
11
500 ns
2014 Microchip Technology Inc.
Installation and Operation
2.3.8
MCP8025 Status Messages
The host may also solicit MCP8025 status information by issuing a STATUS_0 or
STATUS_1 command. The MCP8025 may send an unsolicited STATUS_0 or
STATUS_1 command to the host in the event of a fault or warming. The status
messages are listed in Table 2-8.
TABLE 2-8:
Command
STATUS_0
STATUS MESSAGES
Byte
1
Bit
Value
Description
7:0 00000101 (05H) Status Register 0 Response Not Acknowledged (Response)
01000101 (45H) Status Register 0 Response Acknowledged (Response)
10000101 (85H) Status Register 0 Command To Host (Unsolicited)
2
STATUS_1
1
7:0
00000000
Normal operation
00000001
Temperature warning (TJ > 72% TSD_MIN = 115°C) (Default)
00000010
Overtemperature (TJ > 160°C)
00000100
Input undervoltage (VDD < 5.5V)
00001000
Driver input overvoltage (20V < VDDH < 32V)
00010000
Input overvoltage (VDD > 32V)
00100000
Buck regulator overcurrent
01000000
Buck regulator output undervoltage warning
10000000
Buck regulator output undervoltage (< 80%,brown-out error)
7:0 00000110 (06H) STATUS Register 1 Response Not Acknowledged (Response)
01000110 (46H) STATUS Register 1 Response Acknowledged (Response)
10000110 (86H) STATUS Register 1 Command To Host (Unsolicited)
2
7:0
2014 Microchip Technology Inc.
00000000
Normal operation
00000001
Reserved
00000010
Reserved
00000100
External MOSFET Undervoltage Lock Out (UVLO)
00001000
External MOSFET overcurrent detection
00010000
Brown-out Reset – Config Lost (start-up default = 1)
00100000
5V LDO Under Voltage Lock Out (UVLO)
01000000
Reserved
10000000
Reserved
DS50002307A-page 23
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
2.3.9
MCP8025 Register Definitions
The MCP8025 registers contain the bits operated on by the messaging system. The
registers are only accessible via the various messages. The registers are listed on the
following pages.
REGISTER 2-1:
CFG0: CONFIGURATION REGISTER 0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
PU30K
SLEEP
NEUSIM
EXTUVLO
EXTSC
EXTOC1
EXTOC0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
- n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
Unimplemented: Read as ‘0’
bit 6
PU30K: 30 kΩ level translator pull up
1 = Disable disconnect of 30 kΩ LIN pull up when CE = 0
0 = Enable disconnect of 30 kΩ LIN pull up when CE = 0
bit 5
SLEEP: Sleep mode bit
Bit may only be changed while in Standby mode
1 = System enters Sleep Mode when CE = 0. Disconnect of 30 kΩ LIN pull up always enabled.
0 = System enters Standby Mode when CE = 0
bit 4
NEUSIM: Neutral simulator
1 = Enable internal neutral simulator
0 = Disable internal neutral simulator
bit 3
EXTUVLO: External MOSFET Undervoltage Lockout
1 = Disable
0 = Enable
bit 2
EXTSC: External MOSFET short circuit detection
1 = Disable
0 = Enable
bit 1-0
EXTOC<1:0>: External MOSFET overcurrent limit value
00 = Overcurrent limit set to 0.250V
01 = Overcurrent limit set to 0.500V
10 = Overcurrent limit set to 0.750V
11 = Overcurrent limit set to 1.000V
DS50002307A-page 24
2014 Microchip Technology Inc.
Installation and Operation
REGISTER 2-2:
CFG1: CONFIGURATION REGISTER 1
R/W-0
R/W-1
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
DACREF7
DACREF6
DACREF5
DACREF4
DACREF3
DACREF2
DACREF1
DACREF0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
- n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-0
x = Bit is unknown
DACREF<7:0>: DAC current reference value
(4.503V - 0.991V)/255 = 13.77 mV/bit
00H = 0.991V
40H = 1.872V (40H × 0.1377 mV/bit + 0.991V)
FFH = 4.503V (FFH × 0.1377 mV/bit + 0.991V)
2014 Microchip Technology Inc.
DS50002307A-page 25
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
REGISTER 2-3:
CFG2: CONFIGURATION REGISTER 2
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
–
–
–
DRVDT2
DRVDT1
DRVDT0
DRVBL1
DRVBL0
bit 0
bit7
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
- n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-5
Unimplemented: Read as ‘0’
bit 4-2
DRVDT<2:0>: Driver Dead Time selection bits
000 = 2000 ns
001 = 1750 ns
010 = 1500 ns
011 = 1250 ns
100 = 1000 ns
101 = 750 ns
110 = 500 ns
111 = 250 ns
bit 1-0
DRVBL<1:0>: Driver Blanking Time selection bits
00 = 4000 ns
01 = 2000 ns
10 = 1000 ns
11 = 500 ns
DS50002307A-page 26
x = Bit is unknown
2014 Microchip Technology Inc.
Installation and Operation
REGISTER 2-4:
STAT0: STATUS REGISTER 0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
BUVLOF
BUVLOW
BIOCPW
OVLOF
DOVLOF
UVLOF
OTPF
OTPW
bit 0
bit7
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
- n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
BUVLOF: Buck Undervoltage Lockout fault
1 = Buck output voltage is below 80% of expected value
0 = Buck output voltage is above 80% of expected value
bit 6
BUVLOW: Buck Undervoltage Lockout warning
1 = Buck output voltage is below 90% of expected value
0 = Buck output voltage is above 90% of expected value
bit 5
BIOCPW: Buck input overcurrent protection warning
1 = Buck input current is above 2A peak
0 = Buck input current is below 2A peak
bit 4
OVLOF: Input Overvoltage Lockout fault
1 = VDD Input voltage > 32V
0 = VDD Input voltage < 32V
bit 3
DOVLOF: Driver input Overvoltage Lockout fault
1 = 20V < VDDH
0 = VDD < 20V
bit 2
UVLOF: Input Undervoltage fault
1 = VDD Input voltage < 5.5V
0 = VDD Input voltage > 5.5V
bit 1
OTPF: Overtemperature protection fault
1 = Device junction temperature is > 160°C
0 = Device junction temperature is < 160°C
bit 0
OTPW: Overtemperature protection warning
1 = Device junction temperature is > 115°C
0 = Device junction temperature is < 115°C
2014 Microchip Technology Inc.
x = Bit is unknown
DS50002307A-page 27
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
REGISTER 2-5:
STAT1: STATUS REGISTER 1
U-0
U-0
R-0
R-1
R-0
R-0
R-0
R-0
–
–
UVLOF5V
BORW
XOCPF
XUVLOF
–
–
bit 0
bit7
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
- n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-6
Unimplemented: Read as ‘0’
bit 5
UVLOF5V: 5V LDO Undervoltage Lockout
1 = 5V LDO output voltage < 4.0V
0 = 5V LDO output voltage > 4.0V
bit 4
BORW: Brown-out Reset Warning, Configuration Lost
1 = Device internal reset has occurred since last configuration message
0 = No internal device reset has occurred since last configuration message
bit 3
XOCPF: External MOSFET overcurrent protection fault
Only Valid when EXTSC = 1 in CGF0 Register
1 = External MOSFET VDS > EXTOC value in CFG0 Register
0 = External MOSFET VDS < EXTOC value in CFG0 Register
bit 2
XUVLOF: External MOSFET Gate Drive undervoltage fault
Only valid when EXTUVLO = 1 in CGF0 register
1 = HSx output voltage < 8V
0 = HSx output voltage > 8V
bit 1-0
Unimplemented: Read as ‘0’
DS50002307A-page 28
2014 Microchip Technology Inc.
MCP8025 TQFP BLDC MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Appendix A. Schematic and Layouts
A.1
INTRODUCTION
This appendix contains the following schematics and layouts for the MCP8025 TQFP
BLDC Motor Driver Evaluation Board:
•
•
•
•
•
•
Board – Schematic
Board – Top Silk Layer
Board – Top Metal Layer
Board – Mid1 Metal Layer
Board – Mid2 Metal Layer
Board – Bottom Metal Layer
2014 Microchip Technology Inc.
DS50002307A-page 29
BOARD – SCHEMATIC
Jumper Position
Description
JP1
Enable LINBUS 1K Pullup
ON
ON
Enable LINBUS 220 pF Capacitor
JP2
1-2
Enable CE 47K Pullup to +3.3V
JP7
Enable CE 47K Pulldown to DGND
2-3
1-2
Connect Phase Current To MONITORn
JP8
JP9
Connect Filtered Phase To MONITORn
3-4
JP10
Connect Hall Sensor To MONITORn
5-6
AUX
CLK
DATA
GND
R1
6
5
VDD
3
2
1
J2
/MCLR
4
/MCLR
PICKit Prog
J1
+3.3V
47k
/MCLR
VDD
GND
ICSP DAT
ICSP CLK
SPARE
6 5 4 3 2 1
C1
1uF
10V
JP11
JP12
PGD
PGC
ICD3 Spare
JP13
DGND
1-2
2-3
5V Hall Sensor Power Supply
12V Hall Sensor Power Supply
1-2
Current Sense Offset = JP13 Selection
2-3
ON
OFF
Current Sense Offset = 0.0V
Current Sense Reference = 1.651V
Current Sense Reference = 0.992V
V_BUCK
Faraday Shield Ground Plane on PCB
L1
3.3 uH
744-042-003
C2
1.8 nF
50V
+3.3V
Vbuck = 1.25 (RFB1 + RFB2)/RFB2
3.3V
AVDD
R4
18k
RFB1
D2
SS24-TP
ICD3 Debugger
C4
10uF
16V
R3
1R
D1
SMAJ5.0
C5
10uF
16V
C3
10uF
16V
Buck Feedback (FB)
DGND
R6
4.99
+12V LIN Supply
TP10
VDD
AGND
TP1
R7
11k
RFB2
TP11
PAD4
VDD
DGND
VDD
J4
DGND
2
1
12V_LDO
C8
470 uF
50V
LINBUS
DGND
AVDD
/MCLR
MONITOR_1
MONITOR_2
MONITOR_3
IOUTB
PGND
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
PAD49
OVP Clamp
/ILIMIT
dsPIC_RX
R11
24.9R
DE2
PGC
PGD
+3.3V
C11
1uF
10V
ILIMIT
D8
SMAJ33A
PGND
Q7
C15
1 uF
50V
C13
1 uF
50V
C14
1 uF
50V
R12
10k
VBC
PGND
ZC
MUX2
MUX1
DGND
D9
SMAJ10A
R13
24.9R
FAULTn/TXE
TP2
PGND
2
RP41->U1TX
TCK/CVREF1O/ASCL1/RP40/T4CK/RB8
RP54->U2RX
RP39->U1RX
RP55->U2TX
PGEC2/ASCL2/RP38/RB6
RP56/RC8
PGED2/ASDA2/RP37/RB5
RP57/RC9
VDD
VSS
VSS
VCAP
SCL1/RPI53/RC5
RP42/PWM3H/RB10
SDA1/RPI52/RC4
RP43/PWM3L/RB11
SCK1/RPI51/RC3
U4
RPI44/PWM2H/RB12
SDI1/RPI25/RA9
DSPIC33EP256MC504
RPI45/PWM2L/CTPLS/RB13
CVREF2O/SDO1/RP20/T1CK/RA4
TDO/RA10
FLT32/SCL2/RP36/RB4
TDI/RA7
SDA2/RPI24/RA8
RPI46/PWM1H/T3CK/RB14
OSC2/CLKO/RA3
RPI47/PWM1L/T5CK/RB15
OSC1/CLKI/RA2
AVSS
VSS
AVDD
VDD
nMCLR
AN8/C3IN1+/nU1RTS/BCLK1/FLT3/RC2
AN0/OA2OUT/RA0
AN7/C3IN1-/C4IN1-/RC1
AN1/C2IN1+/RA1
AN6/OA3OUT/C4IN1+/OCFB/RC0
PGED3/VREF-/AN2/C2IN1-/nSS1/RPI32/CTED2/RB0
PGED1/AN5/C1IN1-/RP35/RB3
PGEC3/VREF+/AN3/OA1OUT/RPI33/CTED1/RB1
PGEC1/AN4/C1IN1+/RPI34/RB2
PAD6
D7
SMAJ24A
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
PWM3H
PWM3L
PWM2H
PWM2L
RA10
CE
PWM1H
PWM1L
C17
1uF
10V
AGND
Transient Clamp
R9
24.9R
D6
SMAJ33A
RC8
RC9
C12
10uF
16V
D5
SS24-TP
VBB
Net
2
Tie
R44
22k
LIN RX
LIN TX
DGND
VBA
R10
47k
LIN RX
LIN TX
D4
SS24-TP
+3.3V
TP3
Net
2
Tie
R2
22k
D3
SS24-TP
DE2
R8
2k
dsPIC_TX
VDD
6V To 24V
PGND
2
1
C10
1 uF
50V
1
1
JP2
LINBus Capacitor
DGND
C9
470 uF
50V
1
2
LIN
C6
220pF
50V
DGND
PGND
1
1
2
3
TP12
AGND
FAULTn/TXE
PGND
SPARE_LED
SW2
SW1
RA3
RA2
D10
SMAJ33A
5V_LDO
VBAT 1
2
LIN
GND 3
JP1
LIN Pullup
1
2
R5
1K
1
J3
+3.3V
2014 Microchip Technology Inc.
A.2
C18
1uF
10V
+3.3V
POT
VDD_DIV16
IOUTC
MONITOR_4
IOUTA
PGND
C16
0.1uF
100V
DNP
Q1G
R15
47
+5V
DGND
Q1
C20
10uF
16V
C19
0.1uF
100V
DNP
R16
0.1R
DNP
R17
470k
R18
47
Q2
PGND
C21
0.1uF
100V
DNP
R19
0.1R
DNP
R20
470k
Q2G
R21
47
+3.3V
Q3
MON2
ISENSE_CL
R61
3.74K
R60
R47
MON2_SEL
R63
PGND
AGND
PAD51
MUX1
1K
MUX1
MUX2
47k
2.49k
JP10
U1:1
OUT
1
C51
1uF
10V
MONITOR_3
1526 Hz Filter
PAD52
MUX2
VOFFSET
49
EP
PGND
36
35
34
33
32
31
30
29
28
27
26
25
R43
D15
SS24-TP
DNP
Vdd
MONITOR_4
R79
PGND
+3.3V
1K
ISENSE_B
4
Q6
1526 Hz Filter
Av=11
R71
47k
R65
3.74K
Isense A
R74
.01
5W
C37
100pF
VOFFSET
TP7
AVDD
AVDD
+3.3V
+3.3V
/ILIMIT
TP8
/MCLR
R81
3.74K
AGND
C47
1uF
10V
DGND
SW2
1K
D17
R109
100
DGND
SW1
PWM1L
PWM1H
PWM2L
PWM3L
PWM3H
PWM3L
PWM2H
PWM2L
PWM1H
PWM1L
R101
R102
R103
R104
R106
R105
1K
1K
1K
1K
1K
DGND
RESET
AGND
R93
18.7K
C44
0.1uF
25V
R97
3.74K
R100
1K
1K
R94
24.9K
D18
1
JP13
5
R98
2k
2
3
+
Vref Offset
OFF = 0.992V
ON = 1.651V
D19
D20
D21
D22
D23
D24
D25
D26
C48
0.1uF
25V
4
C50
1uF
10V
DGND
Spare
GREEN
PGND
PGND
+12V
GREEN
+5V
GREEN
DGND
+BUCK
GREEN
DGND
PWM3H
GREEN
DGND
PWM3L
GREEN
DGND
PWM2H
GREEN
DGND
PWM2L
GREEN
DGND
PWM1H
GREEN
DGND
PWM1L
GREEN
AGND
OUT
R107
10.7k
AGND
PAD42
PAD43
NEU_FIL PHC_FIL
C34
0.047uF
25V
5V_LDO
C33
0.047uF
25V
PGND
+5V Hall Effect Supply
JP11
+12V Hall Effect Supply
R68
4.7k
Isense C
R73
.01
5W
R69
4.7k
R70
4.7k
R76
47k
R77
-
AGND
R110
7.5k
JP12
1
1
U3
MCP6021
PAD48
HALL_B
VREF
12V_LDO
5
HALL A
4
R78
HALL_C
C41
100pF
25V
HALL B
3
PAD46
47k
C39
1 uF
C42
100pF 50V
25V
HALL C
2
HALL +
1
HALL J6
R90
90.9k
R91
90.9k
R92
90.9k
PGND
GND
R99
R55
2.4K
C32
0.047uF
25V
C40
100pF
25V
VOFFSET
AVDD
1
4
2
C46
1uF
10V
C31
0.047uF
25V
ISENSE_C
HALL_A
PGND
2
C45
1uF
10V
4
2
4
2
C49
0.1uF
25V
R108
2k
Isense B
R75
.01
5W
1K
PAD50
POT
R54
2.4K
47k
Vss
2
PWM2H
+3.3V
5V_LDO
12V_LDO
SPARE_LED
POT
R96
10K
SW3
R53
2.4K
TP9
C43
10uF
16V
3
1
3
1
3
1
3
VDD_DIV16
VDD
DS50002307A-page 30
SW2
SW2
NEU_FIL
VOFFSET
R95
30k
SW1
R45
300
IOUTA
R89
100
R87
47k
SW1
PHB_FIL
PAD47
AGND
R86
47k
PHA_FIL
R39
300
R83
47k
R84
R31
22k
R40
0.1R
DNP
1K
PGND
47k
C23
1uF
10V
R30
22k
R51
0.1R
DNP
ISENSE_B
C36
0.022uF
25V
MONITOR_4
ISENSE_BL
1K
R33
22k
PAD31
PAD32
PHA_FIL PHB_FIL
R52
2.4K
R56
120k
10R
DNP
R66
R72
R67
3.74K
R64
NEUT
PHC_FIL
PGND
PAD53
ZC
C35
100pF
0.022uF
25V
PH_C
R35
300
R59
D16
SS24-TP
DNP
R32
22k
C28
0.1uF
100V
DNP
PGND
ZC
PGND
AGND
MON4
11
VSS
14
4
VDD
OUT
R37
10k
R80
3.74K
3
2
R42
300
Q6G
C38
-
MCP6021
U1:4
+
+
Av=11
OUT
U6
-
MCP6024
12
1
R41
120k
ISENSE_BL
IOUTB
2.49k
NEU_FIL
5
AGND
IOUT2
R62
13
R82
47k
+
DNP
D14
SMAJ30CA
PHA
10R
DNP
R46
47
13
14
15
16
17
18
19
20
21
22
23
24
3
PH_B
PAD29
C27
0.1uF
100V
DNP
Q5
PGND
PGND
MON3
1
3
5
MON3_SEL
Vss
2
4
6
MCP6024
U5
MCP8025
2
IOUTC
PHC_FIL
HALL_C
-
AVDD
2
PH_A
3
1
-
MCP6021
MONITOR_2
C30
100pF
R36
47
PGND
PGND
+12V
VBA
VBB
VBC
PHA
PHB
PHC
HSA
HSB
HSC
R27
0.1R
DNP
ISENSE_CL
7
ISENSE_C
C29
PWM1L
PWM1H
CE
NC
NC
LINBUS
PGND
RX
TX
FAULTn/TXE
MUX1
MUX2
2
OUT
+
1
2
3
4
PGND
5
PGND
6
LINBUS
7
PGND
8
LIN RX
9
LIN TX
10
FAULTn/TXE
11
12
PWM1L
PWM1H
1K
Q5G
Net
2
Tie
U1:2
0.022uF
25V
R49
R29
120k
DNP
D12
SMAJ30CA
PHB
10R
DNP
1
5
4
Av=11
OUT
U2
D13
SS24-TP
DNP
1
MCP6024
1
3
5
R50
3.74K
PWM3H
2
4
6
1
3
2
JP9
IOUTB
PHB_FIL
HALL_B
IOUTC
Vss
2.49k
-
DGND
R58
47k
+
Vdd
IOUT3
R34
PGND
2
R38
5
AGND
MON1_SEL
6
1526 Hz Filter
VOFFSET
Net
2
Tie
C52
1uF
10V
MONITOR_1
MON1
1
8
4
1
C26
0.1uF
100V
DNP
Q4
Vdd
OUT
PWM2H
PWM2L
PWM3H
PWM3L
DE2
CAP1
CAP2
+5V
FB
VDD
VDD
LX
U1:3
+
ZC_OUT
COMP_REF
/ILIMIT
IOUT1
ISENSE1ISENSE+
PGND
PGND
LSA
LSB
LSC
PGND
10
48
PWM2H
47
PWM2L
46
PWM3H
45
PWM3L
44
DE2
43
42
41
40
39
38
37
-
MCP6024
1
3
5
J5
MOTOR
PAD24
Schematic and Layouts
2
4
6
AVDD
9
JP8
IOUTA
PHA_FIL
HALL_A
TP6
PHC
PAD27
Q4G
R26
47
1
1
C25
10uF
16V
PGND
R28
47k
TP5
PHB
DNP
D11
SMAJ30CA
PHC
12V_LDO
C7
C53
10 uF 10 uF
50V 50V
CE
R25
2.49k
TP4
PHA
PAD26
C24
1 uF
50V
CE
JP7
R22
0.1R
DNP
R23
470k
Q3G
V12
PAD25
C22
1 uF
50V
R24
47k
Schematic and Layouts
A.3
BOARD – TOP SILK LAYER
2014 Microchip Technology Inc.
DS50002307A-page 31
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
A.4
BOARD – TOP METAL LAYER
DS50002307A-page 32
2014 Microchip Technology Inc.
Schematic and Layouts
A.5
BOARD – MID1 METAL LAYER
2014 Microchip Technology Inc.
DS50002307A-page 33
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
A.6
BOARD – MID2 METAL LAYER
DS50002307A-page 34
2014 Microchip Technology Inc.
Schematic and Layouts
A.7
BOARD – BOTTOM METAL LAYER
2014 Microchip Technology Inc.
DS50002307A-page 35
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
NOTES:
DS50002307A-page 36
2014 Microchip Technology Inc.
MCP8025 TQFP BLDC MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Appendix B. Bill of Materials
TABLE B-1:
BILL OF MATERIALS (BOM)
Qty.
Reference
11
C1, C11, C17,
C18, C23,
C45, C46,
C47, C50,
C51, C52
Cap. ceramic 1 μF 10V 10% X7R
SMD 0603
Taiyo Yuden Co., Ltd.
LMK107B7105KA-T
1
C2
Cap. ceramic 1800 pF 50V 10% X7R
0805
AVX Corporation
08055C182KAT2A
7
C3, C4, C5,
C12, C20,
C25, C43
Cap. ceramic 10 μF 16V 10% X7R
SMD 1206
TDK Corporation
C3216X7R1C106K
1
C6
Cap. ceramic 220 pF 50V 10% X7R
SMD 0603
TDK Corporation
C1608X7R1H221K
2
C7, C53
Cap. ceramic 10 μF 50V 10% X5R
1210
Taiyo Yuden Co., Ltd.
UMK325BJ106KM-T
2
C8, C9
Cap. Alum-Elect 470 µF 50V 20%
Radial
United Chemi-Con
EKZE500ELL471MK20S
7
C10, C13,
Cap. ceramic 1 µF 50V 10% X7R
C14, C15,
1210
C22, C24, C39
Taiyo Yuden Co., Ltd.
UMK325B7105KH-T
0
C16, C19,
C21, C26,
C27, C28
TDK Corporation
C2012X7R2A104K
3
C29, C36, C38 Cap. ceramic 22000 pF 25V 10% X7R AVX Corporation
SMD 0603
06033C223KAT2A
6
C30, C35,
C37, C40,
C41, C42
Cap. ceramic 100 pF 50V 10% X7R
0603
4
C31, C32,
C33, C34
Cap. ceramic 47000 pF 25V 10% X7R Panasonic® – ECG
SMD 0603
3
C44, C48, C49 Cap. ceramic 0.1μF 25V 10% X7R
SMD 0603
Murata Electronics®
GRM188R71E104KA01D
1
D1
Vishay
Intertechnology, Inc.
SMAJ5.0A-E3/61
4
D2, D3, D4, D5 Diode Schottky SS24-TP 550 mV 2A
40V SMD DO-214AC_SMA
Micro Commercial
Components
SS24-TP
3
D6, D8, D10
Transient voltage suppressor 400W
33V unidirectional SMA
Vishay
Intertechnology, Inc.
SMAJ33A
1
D7
Transient voltage suppressor 400W
24V unidirectional SMA
Vishay
Intertechnology, Inc.
SMAJ24A
1
D9
Transient Voltage Suppressor 400W
10V unidirectional SMA
Vishay
Intertechnology, Inc.
SMAJ10A
Note 1:
Description
Cap. ceramic 0.1 μF 100V 10% X7R
SMD 0805 – DO NOT POPULATE
Transient voltage suppressor 400W
5% 5V SMA
Manufacturer
KEMET®
Part Number
C0603C101K5RACTU
ECJ-1VB1E473K
The components listed in this Bill of Materials are representative of the PCB assembly. The
released BOM used in manufacturing uses all RoHS-compliant components.
2014 Microchip Technology Inc.
DS50002307A-page 37
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
TABLE B-1:
Qty.
BILL OF MATERIALS (BOM) (CONTINUED)
Reference
Description
Manufacturer
Vishay
Intertechnology, Inc.
Part Number
0
D11, D12, D14 Transient voltage suppressor 400W
30V bidirectional SMA – DO NOT
POPULATE
SMAJ30CA
0
D13, D15, D16 Diode Schottky SS24-TP 550 mV 2A Micro Commercial
40V SMD DO-214AC_SMA – DO NOT Components
POPULATE
SS24-TP
10
D17, D18,
D19, D20,
D21, D22,
D23, D24,
D25, D26
Light Emitting Diode (LED) green,
2x1.2 MM, 570 NM, WTR CLR, SMD
Kingbright Corp.
APT2012CGCK
1
J1
Conn. header 8 POS.100 STR 30AU
FCI
68001-108HLF
1
J2
Conn. modular RJ25 TH R/A
TE Connectivity, Ltd.
5555165-1
1
J3
Conn. term. BLOCK 2.54 mm 3POS
PHOENIX CONTACT
1725669
1
J4
Conn. term. BLOCK 2.54 mm 2POS
PHOENIX CONTACT
1725656
1
J5
Conn. term. BLOCK 2.54 mm 4POS
PHOENIX CONTACT
1725672
1
J6
Conn. term. BLOCK 2.54 mm 5POS
PHOENIX CONTACT
1725685
3
JP1, JP2,
JP13
Conn. header-2.54 male 1x2 tin 6.10
mh. th. vert.
Molex®
0022284020
9
JP3
Mech. hardware jumper 2.54 mm 1x2
handle gold
TE Connectivity, Ltd.
881545-2
3
JP7, JP11,
JP12
Conn. header-2.54 male 1x3 tin 6.75
mh. th. vert.
Molex
90120-0123
3
JP8, JP9,
JP10
Conn. header-2.54 male 2x3 tin 5.84
mh. th. vert.
FCI
67996-406HLF
1
L1
Inductor 3.3 μH 100 kHz
Wurth® Group
744-042-003
4
PAD55
Mech. hardware rubber pad SQ taper
0.50x0.50x0.23 black
3M
SJ-5518
1
PCB
Printed Circuit Board – MCP8025
TQFP BLDC Motor Driver Evaluation
Board
Microchip
Technology Inc.
04-10323
7
Q1, Q2, Q3,
Q4, Q5, Q6,
Q7
MOSFET N-channel 60V 50A DPAK
Fairchild
Semiconductor®
FDD10AN06A0
15
R1, R10, R24,
R28, R58,
R60, R64,
R71, R76,
R77, R78,
R82, R84,
R86, R87
Res. TKF 47kΩ 1% 1/10W SMD 0603 Stackpole
Electronics, Inc.
6
R2, R30, R31, Res. TKF 22 kΩ 1% 1/10W SMD 0603 Stackpole
R32, R33, R44
Electronics, Inc.
RMCF0603JT22K0
1
R3
ERJ-3RQF1R0V
1
R4
Note 1:
Res. TKF 1R 1% 1/10W SMD 0603
Panasonic – ECG
RMCF 1/16 47K 1% R
Res. TKF 18 kΩ 1% 1/10W SMD 0603 ROHM Semiconductor MCR03EZPFX1802
The components listed in this Bill of Materials are representative of the PCB assembly. The
released BOM used in manufacturing uses all RoHS-compliant components.
DS50002307A-page 38
2014 Microchip Technology Inc.
Bill of Materials
TABLE B-1:
BILL OF MATERIALS (BOM) (CONTINUED)
Qty.
Reference
15
R5, R49, R63,
R66, R72,
R79, R83,
R99, R100,
R101, R102,
R103, R104,
R105, R106
Res. TKF 1kΩ 1% 1/10W SMD 0603
Panasonic – ECG
1
R6
Res. 4.99Ω 1/8W 1% 0805 SMD
Yageo Corporation
1
R7
Res. TKF 11 kΩ 1% 1/10W SMD 0603 Panasonic – ECG
3
R8, R98, R108 Res. TKF 2kΩ 1% 1/10W SMD 0603
3
R9, R11, R13
Res. TKF 24.9Ω 1% 1/10W SMD 0603 Vishay/Dale
CRCW060324R9FKEA
2
R12, R37
Res. 10 kΩ 1/10W 1% 0603 SMD
Panasonic – ECG
ERJ-3EKF1002V
6
R15, R18,
R21, R26,
R36, R46
Res. 47Ω 1/8W 1% 0805 SMD
Yageo Corporation
RC0805FR-0747RL
0
R16, R19,
R22, R27,
R40, R51
Res. TKF 0.1R 1% 1/8W SMD 0805 – Panasonic – ECG
DO NOT POPULATE
ERJ-L06KF10CV
3
R17, R20, R23 Res. TKF 470 kΩ 1/10W 1% SMD 0603 Panasonic – ECG
ERJ-3EKF4703V
4
R25, R38,
R47, R62
Res. TKF 2.49 kΩ 1% 1/10W SMD 0603 Panasonic – ECG
ERJ-3EKF2491V
3
R29, R41, R56 Res. TKF 120 kΩ 1% 1/10W SMD 0603 Panasonic – ECG
ERJ-3EKF1203V
0
R34, R43, R59 Res. TKF 10R 1% 1/8W SMD 0805 –
DO NOT POPULATE
4
R35, R39,
R42, R45
7
R50, R61,
Res. TKF 3.74 kΩ 1% 1/10W SMD
R65, R67,
0603
R80, R81, R97
Yageo Corporation
RC0603FR-073K74L
4
R52, R53,
R54, R55
Yageo Corporation
RC0603FR-072K4L
3
R68, R69, R70 Res. TKF 4.7 kΩ 1% 1/10W SMD 0603 ROHM Semiconductor MCR03EZPFX4701
3
R73, R74, R75 Res. 010Ω 5W 1% FLAT SMD
2
R89, R109
3
R90, R91, R92 Res. TKF 90.9 kΩ 1% 1/10W SMD
0603
1
R93
Res. TKF 18.7 kΩ 1% 1/10W SMD 0603 Yageo Corporation
RC0603FR-0718K7L
1
R94
Res. TKF 24.9 kΩ 1% 1/10W SMD 0603 Yageo Corporation
RC0603FR-0724K9L
1
R95
Res. TKF 30 kΩ 1% 1/10W SMD 0603 Stackpole
Electronics, Inc.
RMCF0603FT30K0
1
R96
Potentiometer 10 kΩ 1/8W carb. vert.
1
R107
Res. TKF 10.7 kΩ 1% 1/10W SMD 0603 Panasonic
ERJ-3EKF1072V
1
R110
Res. TKF 7.5 kΩ 1% 1/10W SMD 0603 Panasonic
ERJ-3EKF7501V
3
SW1, SW2,
SW3
Switch tact. spst. 12V 50 mA
TL3301AF260QG SMD
Note 1:
Description
Manufacturer
Stackpole
Electronics, Inc.
ERJ-3EKF1001V
RC0805FR-074R99L
ERJ-3EKF1102V
RMCF0603FT2K00
ROHM Semiconductor MCR10EZHF10R0
Res. TKF 300Ω 1% 1/10W SMD 0603 Yageo Corporation
Res. TKF 2.4 kΩ 1% 1/10W SMD
0603
Part Number
TT Electronics
Plc./IRC, Inc.
Res. TKF 100R 1% 1/10W SMD 0603 Panasonic
Panasonic
CTS® Corporation
E-Switch®, Inc.
RC0603FR-07300RL
OARSXPR010FLF
ERJ-3EKF1000V
ERJ-3EKF9092V
296UD103B1N
TL3301AF260QG
The components listed in this Bill of Materials are representative of the PCB assembly. The
released BOM used in manufacturing uses all RoHS-compliant components.
2014 Microchip Technology Inc.
DS50002307A-page 39
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
TABLE B-1:
Qty.
BILL OF MATERIALS (BOM) (CONTINUED)
Reference
Description
Manufacturer
Part Number
12
TP1 – TP12
SMT test point
Keystone Electronics
Corp.
5016
1
U1
Microchip analog op amp 4-Ch 10
MHz MCP6024-E/ST TSSOP-14
Microchip
Technology Inc.
MCP6024-E/ST
3
U2, U3, U6
Microchip analog op amp 1-Ch 10
MHz MCP6021T-E/OT SOT-23-5
Microchip
Technology Inc.
MCP6021T-E/OT
1
U4
dsPIC33EP256MC504
Microchip
Technology Inc.
dsPIC33EP256MC504-I/PT
1
U5
MCP8025 TQFP-48 3-Phase
Brushless DC (BLDC) Motor Gate
Driver with Power Module, Sleep
Mode, LIN Transceiver
Microchip
Technology Inc.
MCP8025-115E/PT
Note 1:
The components listed in this Bill of Materials are representative of the PCB assembly. The
released BOM used in manufacturing uses all RoHS-compliant components.
DS50002307A-page 40
2014 Microchip Technology Inc.
MCP8025 TQFP BLDC MOTOR DRIVER
EVALUATION BOARD USER’S GUIDE
Appendix C. Software
C.1
SOFTWARE LOCATION
The application software may be downloaded from the MCP8025 web page located on
the Microchip web site, http://www.microchip.com.
C.2
SELECTED SOFTWARE CONSTANTS AND DEFINITIONS
1. FOSC
Microprocessor Oscillator Frequency in Hz. based upon PLL scaling.
2. FPWM = 20000, 40000 or 50000
Selects dsPIC DSC PWM frequency in Hz.
3. PWMRESBITS = 7 or 8 or 9
Sets the PWM resolution and corresponding PLL divisor. 20 kHz may use 7, 8,
or 9 bits. 40 kHz may use 7 or 8 bits. 50 kHz may use 7 or 8 bits.
4. FPLLO
PWM Phase Locked Loop Oscillator frequency.
5. LOOPMODE = CLOSEDLOOPMODE
Sets motor controller to use closed-loop control. The PID control functions will be
used to control motor speed.
6. LOOPMODE = OPENLOOPMODE
Sets motor controller to use open-loop control. The speed adjust input relative
position will be used to set the motor speed.
7. PWM_COUNTS_PER_PERIOD = (FCY/FPWM –1)
Defines the number of timer counts per PWM period.
8. RAMPUP_START_PERIOD
Defines the initial number of PWM periods to use to ramp the motor speed during
startup. The firmware will force the number of PWM periods to occur between
commutations. Both the RAMPUP_START_PERIOD and
RAMPUP_END_PERIOD may need to be adjusted for different motors and
voltages. The settings should be different by at least a value of 10. The motor will
start with “RAMPUP_START_PERIOD” number of PWM periods occurring
before the first commutation, then decrement the RAMPUP_START_PERIOD
value and wait for the new number of PWM periods to occur before commutating
again. This effectively reduces the time between forced commutations and
allows for a controlled ramp up of motor speed during open loop starting.
9. RAMPUP_END_PERIOD
Defines the final number of PWM periods to use to ramp the motor speed during
startup.
10. OPEN_LOOP_ACCEL_RATE
Defines the acceleration rate when changing speeds in open-loop mode.
11. OPEN_LOOP_DECEL_RATE
Defines the deceleration rate when changing speeds in open-loop mode.
12. MAX_DUTY_CYCLE
Defines the maximum desired PWM duty cycle.
2014 Microchip Technology Inc.
DS50002307A-page 41
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
13. MIN_DUTY_CYCLE
Defines the minimum desired PWM duty cycle.
14. STARTUP_DUTY_CYCLE
Defines the initial PWM duty cycle during motor startup. Set this parameter to the
duty cycle required to start the motor for a given supply voltage.
15. PHASE_ADVANCE_DEGREES
Defines the number of electrical degrees (in timer tics) that will be subtracted
from the calculated commutation timer reload count. This allows for
compensating for any latencies in the system.
16. ZC_BLANKING_COUNT
Defines the number of PWM periods that the ADC readings are ignored. This
allows filtering of signals after commutation when high voltage and current spikes
may be present. Set this value to 2 when using the Hurst DMB0224C10002
motor that is available at Microchip Direct. Set the value to 1 for higher speed
hobby motors like the Electrifly Rimfire 0.55 motor.
17. int ReferenceSpeed
Contains the motor target speed based upon the SPEED potentiometer input.
18. int DesiredSpeed
Contains the desired motor target speed based upon the SPEED potentiometer
input.
19. int CurrentSpeed
Contains the current motor speed.
20. unsigned int SpeedControl_P
Proportional term of the closed-loop PID control function. Sets the motor gain
coefficient for the current speed error.
21. unsigned int SpeedControl_I
Integral term of the closed-loop PID control function. Sets the motor gain
coefficient for previous speed changes.
22. unsigned int SpeedControl_D
Derivative term of the closed-loop PID control function. Sets the motor gain
coefficient for predicted errors in the motor control loop.
23. PWM_STATE
Array containing the high-side and low-side gate driver output states for a given
step of the six-step commutation algorithm.
24. IOCONn_LOCKSTATE (n = 1,2,3)
High-side and low-side gate driver output states for locking the rotor to a known
position prior to motor startup.
25. BOOTSTRAP_CHARGE_STATE
High-side and low-side gate driver output states for charging the bootstrap
capacitors prior to motor startup
26. MOTOR_SHUTDOWN_STATE
High-side and low-side gate driver output states that may be used when shutting
down the motor.
27. ADC_MASK[]
A/D Back EMF mask used for majority detection.
28. ADC_XOR[]
A/D Back EMF mask used for majority detection.
29. ADC_BEMF_FILTER[]
A/D Back EMF filter table used to determine next commutation time.
DS50002307A-page 42
2014 Microchip Technology Inc.
Software
C.3
DSPIC33EP256MC504 PIM PORT USAGE
C.3.1
Port A Mapping
#define NA_RA0
PORTAbits.RA0
/* used by AN0 - MONITOR1 */
#define NA_RA1
PORTAbits.RA1
/* used by AN1 - MONITOR2 */
#define UNUSED_RA2
PORTAbits.RA2
/* unused port bit */
#define UNUSED_RA3
PORTAbits.RA3
/* unused port bit */
#define SPARE_LED
PORTAbits.RA4
/* USB LED */
#define NA_RA5
PORTAbits.RA5
/* Not Available */
#define NA_RA6
PORTAbits.RA6
/* Not Available */
#define DRIVER_CE
PORTAbits.RA7
/* driver CE pin */
#define SW1
#define nFAULT_TXE
!PORTAbits.RA8
/* SW1 Push Button */
PORTAbits.RA9
/* LIN Fault/Transmit
Enable bit */
#define UNUSED_RA10 PORTAbits.RA10
C.3.2
/* unused port bit */
Port B Mapping
#define MONITOR3
PORTBbits.RB0
/* used by AN2 - MONITOR3 */
#define IOUTB
PORTBbits.RB1
/* used by AN3 - IOUTB */
#define IOUTA
PORTBbits.RB2
/* used by AN4 - IOUTA */
#define MONITOR4
PORTBbits.RB3
/* used by AN5 - MONITOR4 */
#define SW2
!PORTBbits.RB4
/* SW2 Push Button */
#define PGD
PORTBbits.RB5
/* Programming Data */
#define PGC
PORTBbits.RB6
/* Programming Clock */
#define DE2_RX
PORTBbits.RB7
/* used by RX from DE2
Communications using RP39
and UART */
#define ILIMIT
PORTBbits.RB8
/* driver ILIMIT_OUT: 1= ok,
0=Current Limit or fault,
open-drain */
#define DE2_TX
PORTBbits.RB9
/* used by TX to DE2
Communications using
RP41 and UART
*/
#define PWM3H
PORTBbits.RB10
/* PWM3H output */
#define PWM3L
PORTBbits.RB11
/* PWM3L output */
#define PWM2H
PORTBbits.RB12
/* PWM2H output */
#define PWM2L
PORTBbits.RB13
/* PWM2L output */
#define PWM1H
PORTBbits.RB14
/* PWM1H output */
#define PWM1L
PORTBbits.RB15
/* PWM1L output */
2014 Microchip Technology Inc.
DS50002307A-page 43
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
C.3.3
Port C Mapping
#define IOUTC
PORTCbits.RC0
/* AN6 - IOUTC */
#define VDD_DIV16
PORTCbits.RC1
/* AN7 - VDD_DIV16 */
#define SPEED_POT
PORTCbits.RC2
/* AN8 - Speed Pot */
#define MUX1
PORTCbits.RC3
/* output: Mux select 1 */
#define MUX2
PORTCbits.RC4
/* output: Mux select 2 */
#define ZC
PORTCbits.RC5
/* input: Zero Crossing */
#define LIN_RX
PORTCbits.RC6
/* input: LIN RX port */
#define LIN_TX
PORTCbits.RC7
/* output: LIN TX port */
#define UNUSED_RC8 PORTCbits.RC8
/* unused port bit */
#define UNUSED_RC9 PORTCbits.RC9
/* unused port bit */
C.3.4
A/D Mappings
AN0 (RA0) = MONITOR1
AN1 (RA1) = MONITOR2
AN2 (RB0) = MONITOR3
AN3 (RB1) = IOUTB
AN4 (RB2) = IOUTA
AN5 (RB3) = MONITOR4
AN6 (RC0) = IOUTC
AN7 (RC1) = VDD_DIV16
AN8 (RC2) = Speed Pot
C.4
COMMUNICATIONS MESSAGE MAPPINGS
Message
DS50002307A-page 44
Address
SET_CFG0_MSG
0x81
GET_CFG0_MSG
0x82
SET_CFG1_MSG
0x83
GET_CFG1_MSG
0x84
STAT0_MSG
0x85
STAT1_MSG
0x86
SET_CFG2_MSG
0x87
GET_CFG2_MSG
0x88
2014 Microchip Technology Inc.
Software
C.5
MPLAB X COMPILER STARTUP
1. Start up the MPLAB X compiler (not supplied, available on the Microchip web
site).
2. From the toolbar, select File > Open Project.
3. Browse to the evaluation board source code path.
4. Select the existing project file named MCP8025_EVALUATION_BOARD.
5. In the Projects window, right mouse-click on MCP8025_EVALUATION_BOARD
and select Properties. The page contains the project properties. Processor,
Compiler, Hardware, and Config settings may be changed here.
Note:
The user may need to modify the paths to the source files and linker files
based upon their locations on the host computer. Be sure to verify the
Libraries contain the correct path to libdsp-elf.a
6. Right mouse-click on MCP8025_EVALUATION_BOARD again and select “Make
and Program Device”. This will compile the firmware and download it to the
programming hardware.
7. The compiler results will be displayed in the Output window frame. Verify
success.
C.6
MPLAB X IDE AND PICKIT 3 EXERCISE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
Start up the MPLAB X (not supplied, available on the Microchip web site).
From the toolbar, select File > Open Project.
Browse to the evaluation board source code path.
Select the existing workspace directory named MCP8025_EVALUATION_BOARD
or create a new one.
Connect the PICkit 3 programmer to header J1 on the evaluation board. Align Pin
1 of the header with the Pin 1 mark on the programmer.
Set the bench power supply voltage control to minimum voltage output.
Turn on the power supply and set the output voltage to 14V. Turn off the power
supply.
Connect the bench power supply to the evaluation board. Connect +V(14V) to
J4-2 and –V (Ground) to J4-1.
Turn on the power supply.
Right mouse-click on MCP8025_EVALUATION_BOARD in the Projects window
and select “Make and Program Device”. This will compile the firmware and program the dsPIC33EP256MC504 processor.
The compiler results will be displayed in the Output window frame. Verify
success.
Connect a Brushless DC (BLDC) motor to connector J5. Connect the motor
phase wires to the PH_A (J5-4), PH_B (J5-3), and PH_C (J5-2) terminals. The
NEUT terminal (J5-1) is not used with the demonstration firmware.
Momentarily press the RESET switch on the evaluation board. This step is
required to reset the dsPIC DSC device after programming.
Turn the SPEED adjustment fully counter-clockwise. This sets the motor to the
slowest speed.
Momentarily press the SW2 switch to start the motor.
Momentarily press the SW2 switch again to stop the motor.
Momentarily press the SW2 switch again to start the motor.
Turn the SPEED adjustment clockwise. The motor speed should increase.
2014 Microchip Technology Inc.
DS50002307A-page 45
MCP8025 TQFP BLDC Motor Driver Evaluation Board User’s Guide
19. You may probe the different test points on the board to see the various signals
being generated. The Q1G through Q6G test points will show the external MOSFET gate drive signals. The D21 through D26 LEDs show the state of the PWM
inputs to the MCP8025. The MON1 through MON4 test points show the output
of the jumper-selected signals. PHA_FIL, PHB_FIL, and PHC_FIL are the filtered
Back EMF voltages from the motor. They are used to determine the commutation
time in the demonstration firmware. The SPARE_LED turns ON when a fault has
occurred.
20. Stop the motor by pressing SW2 again.
21. Change the motor control from Closed Loop to Open Loop. This is done by
editing the MCP8025_EVALUATION.C file.
22. Click on Source Files in the Projects window and then double-click on the
MCP8025_EVALUATION.C entry.
23. Search for the preprocessor definition LOOPMODE.
24. Change the LOOPMODE definition from CLOSEDLOOPMODE to
OPENLOOPMODE.
25. Right mouse-click MCP8025_EVALUATION_BOARD in the Projects window and
select “Make and Program Device”. This will compile the firmware and program
the dsPIC33EP256MC504 PIM module.
26. The compiler results will be displayed in the Output window frame. Verify
success.
27. Momentarily press the RESET switch on the evaluation board. This step is
required to reset the dsPIC DSC device after programming.
28. Turn the SPEED adjustment fully counter-clockwise. This sets the motor to the
slowest speed.
29. Momentarily press the SW2 switch again to start the motor.
30. Turn the SPEED adjustment clockwise. The motor speed should increase.
31. In OPENLOOPMODE, the motor speed is forced based upon the position of the
SPEED adjust potentiometer. If the SPEED adjust is set to 60%, the firmware will
set the PWM duty cycle to 60%. While this allows for simple control of the motor,
it is not efficient. If the motor is externally loaded, the motor may not be able to
maintain the manually set commutation time which will result in a motor stall. The
motor runs more efficiently when the motor is allowed to commutate based upon
rotor location and not by an external reference. In CLOSEDLOOPMODE, the
motor will commutate at the proper time based upon the Back EMF information.
If the motor is externally loaded, the motor will automatically adjust for the load
in order to maintain the correct commutation time.
32. Momentarily press the SW2 switch again to stop the motor.
DS50002307A-page 46
2014 Microchip Technology Inc.
Software
NOTES:
2014 Microchip Technology Inc.
DS50002307A-page 47
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2014 Microchip Technology Inc.