Infineon iMOTION AN2018-35 EAL-M1-IM818-A User manual

User Manual Please read the Important Notice and Warnings at the end of this document <Revision 1.3>
www.infineon.com <2021-04-30>
AN2018
-
35 EVAL
-
M1
-
IM818
-
A User Manual
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
About this document
Scope and purpose
This application note provides an overview of the evaluation board EVAL-M1-IM818-A including its main
features, key data, pin assignments and mechanical dimensions.
EVAL-M1-IM818-A is a complete evaluation board including a 3-phase CIPOS™Maxi Intelligent Power Module
(IPM) for motor drive application. In combination with control-boards equipped with the M1 20pin interface
connector, like EVAL-M1-101T or EVAL-M1-099M, it features and demonstrates Infineon’s CIPOS™Maxi IPM
technology for motor drive.
The evaluation board EVAL-M1-IM818-A was developed to support customers during their first steps
designing applications with CIPOS™Maxi IPM.
CIPOS™Maxi IPM in this board is IM818-MCC which has three phase inverter with 1200V TRENCHSTOP™
IGBTs and Emitter Controlled diodes are combined with an optimized 6-channel SOI gate driver. It is
Optimized to industrial applications like Ventilation and Air Conditioning.
Intended audience
This application note is intended for all technical specialists working with the EVAL-M1-IM818-A board.
Table of Contents
About this document....................................................................................................................... 1
Table of Contents ........................................................................................................................... 1
1 Safety precautions......................................................................................................... 3
2 Introduction.................................................................................................................. 5
3 Main features ................................................................................................................ 6
3.1 EVAL-M1-IM818-A board specifications ..................................................................................................7
3.2 Pin assignments ......................................................................................................................................9
4 Getting Started with EVAL-M1-IM818-A ...........................................................................11
4.1 Setting up the system............................................................................................................................11
4.2 iMOTION™development tools and software .......................................................................................13
4.2.1 MCEWizard setup overview..............................................................................................................13
4.2.2 MCEDesigner setup overview ..........................................................................................................15
5 Hardware description of EVAL-M1-IM818-A ......................................................................17
5.1 DC bus Measurement and MCEWizard configuration .......................................................................... 17
5.1.1 Motor External Current feedback configuration and calculation ..................................................18
5.2 EMI filter and soft power up circuit.......................................................................................................21
5.3 Inverter section using CIPOS™Maxi IPM...............................................................................................22
5.4 Auxiliary power supply..........................................................................................................................23
5.5 Schematic with EVAL-M1-IM818-A evaluation board...........................................................................24
5.6 PCB Layout ............................................................................................................................................25
6 Bill of Materials of EVAL-M1-IM818-A ...............................................................................29

User Manual 2 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Safety precautions
7 Reference ....................................................................................................................32

User Manual 3 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Safety precautions
1 Safety precautions
In addition to the precautions listed throughout this manual, please read and understand the following
statements regarding hazards associated with development systems.
Table 1 Precautions

User Manual 4 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Safety precautions
Caution: The ground potential of the EVAL-M1-IM818-A board is biased to a negative
DC bus voltage potential. When measuring voltage waveform by oscilloscope, the
scope’s ground needs to be isolated. Failure to do so may result in personal injury or
death, and equipment damage. Darkened display LEDs are not an indication that
capacitors have discharged to safe voltage levels.
Caution: EVAL-M1-IM818-A system contains DC bus capacitors which take time to
discharge after removal of the main supply. Before working on the drive system,
wait three minutes for capacitors to discharge to safe voltage levels. Failure to do so
may result in personal injury or death. Darkened display LEDs are not an indication
that capacitors have discharged to safe voltage levels.
Caution: Only personnel familiar with the drive and associated machinery should
plan or implement the installation, start-up and subsequent maintenance of the
system. Failure to comply may result in personal injury and/or equipment damage.
Caution: The surfaces of the drive may become hot, which may cause injury.
Caution: The EVAL-M1-IM818-A board contains parts and assemblies sensitive to
electrostatic discharge (ESD). Electrostatic control precautions are required when
installing, testing, servicing or repairing this assembly. Component damage may
result if ESD control procedures are not followed. If you are not familiar with
electrostatic control procedures, refer to applicable ESD protection handbooks and
guidelines.
Caution: An incorrectly applied or installed drive can result in component damage
or reduction in product lifetime. Wiring or application errors such as undersized
motor, incorrect or inadequate DC supply, or excessive ambient temperatures may
result in system malfunction.
Caution: Remove or connect the control board from or to the power drive. Wait three
minutes after removing power from the power drive to discharge the bus capacitors.
Do not attempt to service the drive until the bus capacitors have discharged to zero.
Failure to do so may result in personal injury or death.
Caution: The EVAL-M1-IM818-A board is shipped with packing materials that need to
be removed prior to installation. Failure to remove all packing materials which are
unnecessary for system installation may result in overheating or abnormal
operating condition.

User Manual 5 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Introduction
2 Introduction
The EVAL-M1-IM818-A evaluation board is a part of the iMOTION™Modular Application Design Kit for drives
(iMOTION™MADK).
The MADK platform is intended to use various power stages with different control boards. These boards can
easily be interfaced through the iMOTION™MADK M1 interface connector which is 20 pin connector.
This evaluation board is designed to give easy-to-use power stage based on the Infineon's CIPOS™Maxi
Inteligent Power Module (IPM). The board is equipped with all assembly circuit for sensorless field oriented
control (FOC). It provides a single-phase AC-connector, rectifier and 3-phase output for connecting the
motor. The power stage also contains emitter (leg) shunts for current sensing and a voltage divider for DC-
link voltage measurement.
The EVAL-M1-IM818-A evaluation board is available through regular Infineon distribution partners as well as
on Infineon's website. The features of this board are described in the design feature chapter of this
document, whereas the remaining paragraphs provide information to enable the customers to copy, modify
and qualify the design for production according to their own specific requirements.
Environmental conditions were considered in the design of the EVAL-M1-IM818-A. The design was tested as
described in this document but not qualified regarding safety requirements or manufacturing and operation
over the whole operating temperature range or lifetime. The boards provided by Infineon are subject to
functional testing only.
Evaluation boards are not subject to the same procedures as regular products regarding Returned Material
Analysis (RMA), Process Change Notification (PCN) and Product Discontinuation (PD). Evaluation boards are
intended to be used under laboratory conditions and by trained specialists only.
The block diagram of the EVAL-M1-IM818-A is depicted in Figure 1. This evaluation board includes a DC EMI
filter and soft power up circuit, 20-pin iMOTION™MADK-M1 interface connector, auxiliary power supply to
provide 15 V and 3.3 V, and the CIPOS™Maxi IPM IM818-MCC.
M
EMI Filter
& Soft
Power Up
Circuit
HVIC
20 pin iMOTIONTM
MADK-M1 connector
Power
Supply
CIPOSTM Maxi IPM
A
B
15V
PWM
Itrip & protection
circuit VTH
Itrip
PWM
VTH
GK
DCBsense
15V & 3.3V
RFE
C
Figure 1 The Block Diagram of the EVAL-M1-IM818-A
CIPOS™Maxi IPM in this board is IM818-MCC which has 1200 V of voltage and 10A of current rating. It is Optimized
6-channel SOI gate driver for excellent electrical performance. It is designed to control 3 phase AC motors and
permanent magnet motors in variable speed drives applications such as low power motor drives.

User Manual 6 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Main features
3 Main features
EVAL-M1-IM818-A is an evaluation board for motor drive applications based on a 3-phase IPM. Combined
with one of the available MADK control board options, it demonstrates Infineon's IPM technology for motor
drives. The kit demonstrates Infineon’s IPM technology for motor drives.
Main features of CIPOS™Maxi IPM IM818-MCC are:
• 1200 V TRENCHSTOP™IGBT4
• Maximum blocking voltage VCES = 1200 V
• Maximum output current at 25 °C case temperature IC= 16 A
• Rugged 1200 V SOI gate driver technology with stability against transient and negative voltage
• Allowable negative VSpotential up to -11 V for signal transmission at VBS = 15 V
• Integrated bootstrap functionality
• Overcurrent shutdown
• Built-in NTC thermistor for temperature monitoring
• Under-voltage lockout at all channels
• Low side emitter pins accessible
• For all phase current monitoring (open emitter)
• Cross-conduction prevention
• All of 6 switches turn off during protection
• Programmable fault clear timing and enable input
• Lead-free terminal plating; RoHS compliant
The evaluation board characteristics are:
• Nominal input voltage 380 VAC
• Default 1.5 kW motor power output
• On board EMI filter
• Current sensing for each leg configured by default
• Sensing of DC-link voltage
• Measurement test-points compatible to standard oscilloscope probes
• PCB size is 197 mm x 140 mm and has two layers with 35 µm copper each
• RoHS compliant

User Manual 7 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Main features
3.1 EVAL-M1-IM818-A board specifications
Table 2 depicts the important specifications of the evaluation board EVAL-M1-IM818-A.
Table 2 EVAL-M1-IM818-A board specifications
Parameters
Values
Conditions
/ comments
Input
Voltage
380 Vrms ±20% VAC input
Input current
6 Arms Input 380 VAC, Ta=25C
Output
Power (3
phases)
1500 W Input 380VAC, fPWM =6 kHz, Ta=25°C,
TC=100°C, Natural convection
Phase
Current
2.35Arms Input 380VAC , fPWM =6 kHz, Ta=25°C,
TC=100°C, Natural convection
DC Bus Voltage
Maximum DC bus voltage
820
V
Lim
ited by
electrolytic capacitor
which
max voltage is 900V
Minimum
DC bus voltage
400 V
A
ux power supply can start
Current feedback
Current sensing resistors RS
U
,
RSV, RSW
25
m
Ω
X 3
Two 50mΩ in parallel for one leg
Protections
Output current trip level
20
A
peak
Current feedback to controller, so over
current protection level is decided by
controller. This Itrip level for IPM
Temperature trip level
100
°C
Internal NTC temperature to controller.
Recommend to set this level for protection
On board power supply
15 V
15 V
±
5 %,
m
ax
.
2
5
0
mA
Used for
CIPOS
™
IPM
gate driver
and LDO
3.3 V
3.3 V
±
2
%,
m
ax
.
2
0
0
mA
Su
pplying the 3.3V to the controller board
PCB characteristics
Material
FR4, 1.6 mm
thickness, 2
layers.
35 µm copper thickness
Dimension
1
9
7
mm x
1
4
0
mm
x 70mm
System environment
Ambient temperature
From 0 to
43
°C
Non
-
condensing, maximum RH of 95 %

User Manual 8 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Main features
Figure 2 points out the functional groups on the top side of the EVAL-M1-IM818-A evaluation board.
Figure 2 Functional groups of the EVAL-M1-IM818-A evaluation board’s top side
1
.
J1
-
AC Line connector
2. Relay and Fuse
3. J2 - 20 pin iMOTION™MADK-M1 interface
connector for controller board
4. Shunt resistors
5. EMI filter
6. Auxiliary power supply
7. J3 - Motor phase connector
8. CIPOS™Maxi IPM
9. Rectifier bridge DB

User Manual 9 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Main features
3.2 Pin assignments
General information about the connectors of the EVAL-M1-IM818-A evaluation board is reported. Table 3
includes the details of the AC line connector J1.
Table 3 J1- AC Line connector
S. No. Pin Details
1 EARTH Earth ground
2 Not used Not used
3 A AC line input (380V)
4 B AC line input (380V)
5 C AC line input (380V)
Table 4 provides the pin assignments of the 20 pin iMOTION™MADK-M1 interface connector J2. This
connector is the interface to the controller board.
Table 4 J2 - iMOTION™MADK-M1 20 pin interface connector for controller board
Pin Name Pin Name Connectors
1 PWMUH 3.3 V compatible logic input for high side gate driver-Phase U
2 GND Ground
3 PWMUL 3.3 V compatible logic input for low side gate driver-Phase U
4 GND Ground
5 PWMVH 3.3 V compatible logic input for high side gate driver-Phase V
6 +3.3V On board 3.3 V supply
7 PWMVL 3.3 V compatible logic input for low side gate driver-Phase V
8 +3.3V On board 3.3 V supply
9 PWMWH 3.3 V compatible logic input for high side gate driver-Phase W
10 I_U Shunt voltage phase U
11 PWMWL 3.3 V compatible logic input for low side gate driver-Phase W
12 I_U- Ground
13 GK Gate kill signal – active low when overcurrent is detected
14 DCBSENSE DC bus positive voltage, scaled in 0-3.3 V range by a voltage divider
15 VTH Thermistor Output
16 I_V Shunt voltage phase V
17 I_V- Ground
18 I_W Shunt voltage phase W
19 I_W- Ground
20 VCC 15 V Power Supply

User Manual 10 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Main features
Table 5 denotes the details of the motor side connector J2.
Table 5 J2- Motor side connector
S. No. Pin Details
1 W Connected to motor phase U
2 V Connected to motor phase V
3 U Connected to motor phase W

User Manual 11 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Getting Started with EVAL-M1-IM818-A
4 Getting Started with EVAL-M1-IM818-A
In order to run the motor system, a combination of the iMOTION™MADK power board (EVAL-M1-IM818-A)
and the matching MADK control board is required. The iMOTION™Software Tools MCEDesigner and
MCEWizard are also required in order to initialy setup the system, as well as to control and fine-tune the
system performance to match users exact needs. This chapter provides more details on setting up the
system and getting started with iMOTION™MADK development platform.
4.1 Setting up the system
After downloading and installing the iMOTION™PC Tools (MCEWizard and MCEDesigner), following steps
needs to be executed in order to run the motor. Refer to user manul for iMOTION™MADK control board such
as (EVAL-M1-101T), MCEWizard and MCEDesigner documentation for more information.
Figure 3 shows the system connection using EVAL-M1-IM818-A and control board (used control board EVAL-
M1-101T for example).
Figure 3 System connection example using EVAL-M1-IM818-A and EVAL-M1-101T
1. Connect PC-USB connector on the on-board-debugger to the PC via USB cable.
2. Connect EVAL-M1-IM818-A’s MADK M1 20-pin interface connector (J3) to control board (see Figure 3).
3. Get the latest “IMC101T-T038 MCE Software Package” available on www.infineon.com/imotion-software
web page. (Infineon iMOTION™control IC IMC101T-T038 is used for control board EVAL-M1-101T).
4. Connect motor phase outputs to the motor.
5. Use MCEWizard to enter the motor and evaluation board hardware parameters and click button “Export to
Designer file (.txt)” to system drive parameters file which will be used by MCEDesigner.
PC
-
USB
C
onnector
AC Power
I
nput
Motor
P
hase
O
utput
s

User Manual 12 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Getting Started with EVAL-M1-IM818-A
6. Connect AC power to power input connector (J1) and power on system.
7. Open MCEDesigner and open MCEDesigner default configuration file (.irc) for IMC101T devices
(IMC101T_xx.irc) by clicking “File” menu and select “Open” in the pull down list.
8. Import system drive parameters file (generated in step 5) into MCEDesigner by clicking “File” > “Import
Drive Parameters”. Select “Update All” radio button.
9. Program the MCE Firmware and system parameters into the internal Flash memory of iMOTION™IC by
clicking “Tools > Programmer “in the pull down menu, and then clicking on the “Program Firmware and
Parameter” radio button. See chapter MCEDesigner setup overview setion 4.2.2 for more details. If the
latest version of MCE firmware is already programmed into the IMC101T-T038 IC, then programming
firmware can be skipped by selecting “Program Parameters” radio button option. Finally click “Start”
button to program firware and parameter (or parameters only when programming firmware was skipped).
10. Start the motor by clicking the green traffic light button in the control bar.

User Manual 13 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Getting Started with EVAL-M1-IM818-A
4.2 iMOTION™development tools and software
The iMOTION™Development Tool installers for MCEDesigner and MCEWizard are available for download via
Infineon iMOTIONTM website (http://www.infineon.com/imotion-software). All the available tools and
software variants are listed there.
On-board debugger uses the SEGGER J-Link’s driver for UART communication with IMC101T-T038. J-Link
driver will be installed during the MCEDesigner installation. In case the driver is not installed properly, please
go to SEGGER J-Link website to download and install the latest J-Link “Software and Documentation pack
for Windows”.
4.2.1 MCEWizard setup overview
After installing the MCEWizard, the shortcut for MCEWizard appears on the Windows desktop. Double click
the shortcut to open the MCEWizard and configure the parameters for evaluation boards or motor. Figure 4
shows the “Welcome Page” for MCEWizard, where the MADK control board or power board can be selected
through the pull-down list. Infineon keeps releasing new MADK controller and power boards. Therefore, it
could happen that some of the newest power boards are not pre-configured in the MCEWizard tool and
cannot be selected through the pull-down menu. In that case, the user should select any other power board
(as similar as possible) and follow the MCEWizard setup steps by entering the parameter values which are
specific to the chosen board. Make sure both “I have modified the circuit board” and “Enable advanced
question” checkmarks are selected. Please refer to the User Manual of the corresponding power board for
additional information.
After selecting the MADK control and the power board, start the MCEWizard system setup procedure by
clicking the “Next” button in the right bottom corner as shown in Figure 4.
Figure 4 Welcome Page of MCEWizard
iMOTION™MADK system enables users to easily test different combination of control and power board with
their motors. User should be familiar with the system level parameters which are related to the motor used.

User Manual 14 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Getting Started with EVAL-M1-IM818-A
There are very limited numbers of parameters which are specific to the control board or power board
hardware.
Table 6 provides the MCEWizard setup overview for hardware related parameters specific to EVAL-M1-
IM818-A power board. Similar tables will be available in each control board’s User Manual. Combination of
this table and the corresponding table of the control board provides enough information to setup the MADK-
based motor drive system in shortest time.
Table 6 MCEWizard setup overview table
Page Parameter Value Comment
Welcome Page Control Board selecting EVAL-M1-101T for example
Welcome Page Power Board selecting EVAL-M1-IM818-A If no, select similar
power board to modify
Options Page Motor 1 Shunt Configuration Leg shunt
Question 3 Controller Supply Voltage +3.3V VDD is 3.3V by default
Question 19 Max DC Bus Voltage 820V
Question 23 DC Bus Sensing High Resistor 5000 kΩ
Question 24 DC Bus Sensing Low Resistor Refer to the control board user
manual
Question 54 NTC Temperature Shutdown
value
Refer to the control board user
manual
Question 63 GateSense Low-Side Devices High is true
Question 64 GateSense High-Side Devices High is true
Question 69 Motor 1 Current Input Calculated in the corresponding
Section in control board user
manual
After all the MCEWizard questions are answered, the “Verify & Save Page” will be shown as in Figure 5
Figure 5 Verify and Save page for MCEWizard

User Manual 15 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Getting Started with EVAL-M1-IM818-A
Click “Calculate” button and “Export to Designer File (.txt)” button to save the parameter file which will be
used by the MCEDesigner in the next steps.
4.2.2 MCEDesigner setup overview
After installing MCEDesigner installer, there is a shortcut for MCEDesigner on Windows desktop. Double click
the shortcut to open MCEDesigner and then open “IMC101T_xx.irc” file as shown in Table 6.
Figure 6 MCEDesigner’s Main Display for EVAL-M1-101T
To program system drive parameters into IMC101T-T038, please click “Tools” menu and select
“Programmer” in the pull down list. The pop-up window “Program IMC controller” will show up as in Figure
7. Click on the “Program Parameters” radio button (this is the default option), and then select the Drive
System Parameter file created using MCEWizard by clicking on “Browse”. Finally, click on the “Start” button
to program the parameter file into the IMC101T-T038 IC.
Figure 7 “Program IMC Controller” pop-up window

User Manual 16 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Getting Started with EVAL-M1-IM818-A
After Drive System Parameter file has been programmed into IMC101 controller, and the motor drive system
is powered, the MCEDesigner can be used to start/stop the motor, display motor current traces, change the
motor speeds, modify drive parameters and many other functions. Please refer to the MCEDesigner
documentation for more details.
Note: On-board Debugger portion of EVAL-M1-101T is galvanically isolated from the controller portion and the
attached power board. In order to program the parameters or firmware to the IMC101T-T038 controller, the
3.3V DC voltage needs to be supplied to the controller portion of the EVAL-M1-101T. This voltage can either
be supplied by the power board (MADK power boards are designed to supply the 3.3V to the control board
through M1 connector) or by feeding the 3.3V DC voltage to the control board through some of the available
3.3V access/test points if the power board is not attached to the EVAL-M1-101T control board.
To program new firmware and Drive System Parameter into IMC101T-T038, please click “Tools” menu and
select “Programmer” in the pull down list. The pop-up window “Program IMC controller” will show up as in
Figure 8. Click on the “Program Firmware and Parameter” radio button, and select the Drive System
Parameter file created using MCEWizard by clicking on the “Browse” button on the row of “Program
Parameter File”, and then select the firmware file by clicking on the “Browse” button on the row of “Program
Firmware File”. Finally, click on the “Start” button to program the parameter file into the IMC101T-T038 IC.
Figure 8 Program Firmware and Parameter in “Program IMC Controller” pop-up window
All the latest firmware files for different types of iMOTIONTM motor control ICs are available for download via
Infineon iMOTIONTM website (http://www.infineon.com/imotion-software).

User Manual 17 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Hardware description of EVAL-M1-IM818-A
5 Hardware description of EVAL-M1-IM818-A
To meet individual customer requirements and make the EVAL-M1-IM818-A evaluation board a basis for
development or modification, all necessary technical data like schematics, layout and components are
included in this chapter.
5.1 DC bus Measurement and MCEWizard configuration
Pin 14 of connector J3 provides access to the DC-link voltage. Three possible feedback cases are associated
with this pin. Figure 9 provides the DC bus sense resistor details. By default, the resistor R8 is mounted on
EVAL-M1-IM818-A.
Figure 9 DC bus sense resistor on EVAL-M1-IM818-A evaluation board
The pull down resistor R8 of 1 MΩ referred to ground is inserted on the EVAL-M1-IM818-A evaluation board
to prevent the high BUS voltage +BUS directly connecting to the connector J3. And a pull down resistor of
13.3 kΩ for EVAL-M1-101T or 4.87 kΩ for EVAL-M1-183M must be inserted on the control board, and then the
DCBSENSE voltage results in the range of 0 to 3.3 V on the pin reflecting a DC bus voltage range of 0 to 800
V.
DCBSENSE
LED1
RED
+BUS
R5
1M
R11
1M
R12
1M
R10
1M
R9
1M
R8
1M

User Manual 18 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Hardware description of EVAL-M1-IM818-A
Figure 10 DC bus sensing configuration in MCEWizard
5.1.1 Motor External Current feedback configuration and calculation
The current input value is product of the shunt resistance in milliohms and gain of External current sense
amplifier for EVAL-M1-101T as shown in Figure 11.
Figure 11 Current shunt feedback and sample timing for EVAL-M1-101T
The external amplifier gain circuit can be found in the schematics or user manual for the control board (For
example, EVAL-M1-101T see Figure 12).

User Manual 19 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Hardware description of EVAL-M1-IM818-A
Figure 12 depicts IU+ current feedback sensing circuity on EVAL-M1-101T evaluation board. Please note that
the default external amplification gain is less than 1 for current sense in this evaluation board.
Figure 12 The part of Current feedback on the EVAL-M1-101T evaluation board
Based on the principle of Kirchhoff's voltage law,
𝑉
2≈𝑉 1≈(𝑉 𝐷𝐷 −𝐼𝑠ℎ ∗𝑅𝑠ℎ)∗𝑅7
𝑅6+𝑅7
+𝐼𝑠ℎ ∗𝑅𝑠ℎ =𝑅7
𝑅6+𝑅7
𝑉
𝐷𝐷 +𝑅6
𝑅6+𝑅7
𝑅𝑠ℎ ∗𝐼𝑠ℎ
𝐶𝑢𝑟𝑟𝑒𝑛𝑡 𝑖𝑛𝑝𝑢𝑡 =𝑅6
𝑅6+𝑅7
𝑅𝑠ℎ =5
6𝑅𝑠ℎ
Based on this calculation, the current input for the MADK combination of EVAL-M1-101T and EVAL-M1-IM818-A
is 20.83mV/A.
Please use same procedure to calculate the current input for other combinations of MADK boards and enter it
into MCEWizard as shown in Figure 13.
R7 2k, 1% C15
220pF
IU+
R6
10k, 1%
+3.3V
R8 100RRsh
iMOTION
IU Controller V1 V2 6
CurrentShunt
Resistor on power board
1sh

User Manual 20 <Revision 1.3>
<2021-04-30>
EVAL-M1-IM818-A User Manual
iMOTION™Modular Application Design Kit
Hardware description of EVAL-M1-IM818-A
Figure 13 Current feedback configuration in MCEWizard for EVAL-M1-101T and EVAL-M1-IM818-A