Infineon iMOTION EVAL-M1-36-44A User manual

User Manual Please read the Important Notice and Warnings at the end of this document Revision 1.0
www.infineon.com 2019-07-25
AN2019
-03 EVAL-M1-36-44A User Manual
EVAL-M1-36-44A User Manual
iMOTION™ Modular Application Design Kit
About this document
Scope and purpose
This application note provides an overview of the evaluation board EVAL-M1-36-44A including its main features,
key data, pin assignments and mechanical dimensions.
EVAL-M1-36-44A is a complete evaluation-board including a 3-phase IPM for motor drive applications. Together
with EVAL-M1-101T or EVAL-M1-099M it features and demonstrates Infineon’s IPM technology for motor drives.
The evaluation board EVAL-M1-36-44A for Intelligent Power Modules (IPM) was developed to support customers
during their first steps designing applications with CIPOS™ Nano power modules.
Intended audience
This application note is intended for all technical specialists working with the EVAL-M1-36-44A board.
Table of Contents
About this document ....................................................................................................................... 1
Table of Contents ........................................................................................................................... 1
1 Safety precautions ......................................................................................................... 2
2 Introduction .................................................................................................................. 3
3 Main features ................................................................................................................ 5
3.1 Key data ................................................................................................................................................... 6
4 Pin Assignments ........................................................................................................... 10
5 Getting Started with EVAL-M1-36-44A ............................................................................. 12
5.1 Setting up the system............................................................................................................................ 12
5.2 iMOTION™ development tools and software ....................................................................................... 14
5.2.1 MCEWizard setup overview .............................................................................................................. 14
5.2.2 MCEDesigner setup overview .......................................................................................................... 16
6 Schematics and Layout .................................................................................................. 18
6.1 DC-Link Voltage Measurement ............................................................................................................. 18
6.2 Inverter section using CIPOS™ Nano IPM ............................................................................................. 19
6.3 Current Measurement and Over Current Circuit .................................................................................. 20
6.4 Auxiliary Power supply .......................................................................................................................... 21
6.5 PCB Layout ............................................................................................................................................ 22
7 Bill of Materials of EVAL-M1-36-44A ................................................................................. 24
8 Reference .................................................................................................................... 27
Revision History ............................................................................................................................ 28

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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
Caution: The ground potential of the EVAL-M1-36-44A system 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-M1-36-44A 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-M1-36-44A 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-M1-36-44A 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.

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Introduction
2 Introduction
The EVAL-M1-36-44A 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 be
easily interfaced through the 20 pin iMOTION™ MADK M1 interface connector which is 20 pin connector.
This evaluation board was designed to give comprehensible solutions of a power stage featuring CIPOS™ Nano.
The board is equipped with all assembly groups for sensor less field oriented control (FOC). DC-link is provided
by direct DC-input to give direct control to DC-ripple by external source. It contains in every of three output
phases emitter-shunts for current sensing and a voltage divider for DC-link voltage measurement.
The EVAL-M1-36-44A evaluation board is available from Infineon. 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-M1-36-44A. 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 by specialists only.
Figure 1 Evaluation-board EVAL-M1-36-44A

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Introduction
Figure 1 shows the evaluation board EVAL-M1-36-44A.This document explains the features and details of
CIPOS™ Nano IRSM836-044MA. This module is rated 250 V. Ratings and other details of the board are explained
in the subsequent sections.

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Main features
3 Main features
EVAL-M1-36-44A 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.
CIPOS™ Nano Intelligent Power Module (IRSM836-044MA) features are:
 Integrated gate drivers and bootstrap functionality
 Open-source for leg-shunt current sensing
 Protection shutdown pin
 Low RDS (on) Trench MOSFET
 Under-voltage lockout for all channels
 Matched propagation delay for all channels
 Optimized dV/dt for loss and EMI trade offs
 3.3 V Schmitt-triggered active high input logic
 Motor power range up to ~150 W, without heat sink
 Cross-conduction prevention logic
 Isolation 1500 V RMS min
 ROHS compliant
The evaluation board characteristics are:
 Nominal input voltage 120 VAC
 Default 120 W motor power out
 3 leg shunt configuration
 3.3 V logic compatible
 Overcurrent protection
 Fault diagnostic output
 PCB is 90x 75mm has two layers with 1oz (~35µm) copper each
 RoHS compliant

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Main features
3.1 Key data
Figure 2 provides internal electrical schematics of IRSM836-044MA. For further information regarding these
IPMs like static and dynamic electrical behavior, as well as thermal and mechanical characteristics please refer
to the datasheet of the IRSM836-044MA.
Figure 2 CIPOS™ Nano internal electrical schematic
Table 2 lists major absolute maximum ratings of the IRSM836-044MA. Absolute maximum ratings are limitations
which should not be less than minimum or higher than maximum ratings. Outside these limitations for safe
operation, damage of the module should be expected.
Table 2 CIPOS™ Nano Absolute Maximum Ratings of IRSM836-044MA
Symbol Description Min Max Unit
BVDSS MOSFET Blocking Voltage --- 250 V
IO @ T=25°C DC Output Current per MOSFET --- 4 A
IOP Pulsed Output Current --- 16 A
Pd @ TC=25°C Maximum Power Dissipation per MOSFET --- 22 W
VISO Isolation Voltage (1min) --- 1500 VRMS
TJ Operating Junction Temperature -40 150 °C
TL Lead Temperature (Soldering, 20 seconds) --- 260 °C
TS Storage Temperature -40 150 °C
VS1,2,3 High Side Floating Supply Offset Voltage VB1,2,3 - 20 VB1,2,3 +0.3 V
VB1,2,3 High Side Floating Supply Voltage -0.3 250 V

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Main features
Symbol Description Min Max Unit
VCC Low Side and Logic Supply voltage -0.3 20 V
VIN
Input Voltage of LIN, HIN, ITRIP, EN, RCIN,
FLT VSS -0.3 VCC+0.3 V
Table 3 depicts the recommended operating conditions of IRSM836-044MA.
Table 3 Recommended operating conditions of CIPOS™ Nano IRSM836-044MA
Symbol Description Min Max Unit
V+ Positive DC Bus Input Voltage --- 200 V
VS1,2,3 High Side Floating Supply Offset Voltage --- 200 V
VB1,2,3 High Side Floating Supply Voltage VS+10 VS+20 V
VCC Low Side and Logic Supply Voltage 11.5 18.5 V
VIN Input Voltage of LIN, HIN, ITRIP, EN, FLT 0 5 V
FP PWM Carrier Frequency --- 20 kHz

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Main features
Table 4 shows the important specifications of the evaluation board EVAL-M1-36-44A.
Table 4 EVAL-M1-36-44A board specifications
Parameters
Value
Conditions
Input
Voltage 100 - 120 Vrms lower AC input, less motor power output
Input current 1 A input 120 VAC, Ta=25C, IRSM836-044MA
Output
Power(3phases) 120 W** IRSM836-044MA
Current per leg 0.75 A* IRSM836-044MA
fPWM=6 kHz, Ta=25°C, Tc=100°C, */**without heatsink
DC Bus
Maximum DC bus voltage 200 V
Minimum DC bus voltage 60 V
Current feedback
Current sensing device
RS1,RS2,RS3 0.5 Ω
The default configuration uses three shunts in
the emitter paths. To implement single shunt
sensing, the board should be modified:
1) RS1 and RS3 have to be removed
2) IU+,IV+,IW+ have to be connected
3) R36 has to be changed to 10 kΩ
Protections
Output current trip level 2.5 Apk
Configured by changing either shunt resistors
RS1, RS2, RS3 or comparator threshold by
resistor R36
On board power supply
15V 15 V±5 %, Max 20 mA Used for CIPOS™ gate driver power
3.3V 3.3 V±5 %, Max 50 mA Used for interface signal with control board
and alarm signals as ITRIP, FLT/EN
PCB characteristics
Material
FR4, 1.6 mm thickness,
2-layers. 35 µm Copper
thickness
Dimension 90 mm x 75 mm
System environment
Ambient temperature From 0 to 70°C 95 % RH max. Non-condensing

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Main features
Figure 3 and Figure 4 are indicating the functional groups of the EVAL-M1-36-44A evaluation board.
Figure 3 Functional groups of the EVAL-M1-36-44A evaluation board’s top side
Figure 4 Functional groups of the EVAL-M1-36-44A evaluation board’s bottom side
6.
On board power supply
for
15 V and 3.3 V Generation
7. Shunt resistors
8. Over current protection
8
1. CIPOS™ nano module
2. Motor phase connector (J3)
3. iMOTION™ M1 20 pin
connector (J4)
4. AC input connector (J1)
5. EMI filter and Rectifier group
1
6
7
2
3
4
5

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Pin Assig
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4 Pin Assignments
General information about the connectors of the EVAL-M1-36-44A evaluation board is reported. Table 5
includes the details of the line connector J1-AC. It is possible to connect DC voltage to the AC connector. In this
case a permanent DC-current will be conducted through the rectifier bridge. Maximum ratings are valid for AC
as well as DC conditions. It is recommended to observe the temperature of the rectifier bridge. Due to the
rectifier, DC supply’s polarity at the connector is of no concern.
The evaluation board doesn’t have a fuse. An external fuse is highly recommended during testing.
Table 5 J1- AC Line Connector
S. No. Pin Details
1 E Earth ground
2 L AC neutral input
3 N AC line input
Table 6 denotes the details of the motor side connector J2.
Table 6 J2- Motor side connector
S. No. Pin Details
1 U Connected to motor phase U
2 V Connected to motor phase V
3 W Connected to motor phase W

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Pin Assignments
Table 7 registered the pin assignments of J3, iMOTION™ -M1 20 pin interface connector. This connector is the
interface to the controller board.
Table 7 J3 –iMOTION™ M1 20 pin interface connector to connect EVAL-M1-36-44A to controller board
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 IU+ Shunt voltage phase U
11 PWMWL 3.3 V compatible logic input for low side gate driver-Phase W
12 IU- Ground
13 GK Gate kill signal – active low when over current is detected
14 DCBSENSE DC bus positive voltage, scaled in 0-3.3 V range by a voltage divider
15 VTH Thermistor Output
16 IV+ Shunt voltage phase V
17 IV- Ground
18 IW+ Shunt voltage phase W
19 IW- Ground
20 VCC 15 V power supply

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5 Getting Started with EVAL-M1-36-44A
In order to run the motor system, a combination of the iMOTION™ MADK power board EVAL-M1-36-44A and the
matching MADK control board (with M1 connector, EVAL-M1-101T for example in this chapter) is required. The
iMOTION™ Software Tools MCEDesigner and MCEWizard are also required in order to initially 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.
5.1 Setting up the system
After downloading and installing the iMOTION™ PC Tools (MCEWizard and MCEDesigner), following steps need
to be executed in order to run the motor. Refer to chapters 5.2.1 and 5.2.2 as well as MCEWizard and
MCEDesigner documentation for more information.
Figure 5 System connection example using EVAL-M1-101T and EVAL-M1-36-84A
1. Connect PC-USB connector on the on-board-debugger to the PC via USB cable.
2. Connect EVAL-M1-36-A’s MADK M1 20-pin interface connector (J3) to control board (see Figure 5).
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
Motor
P
hase
O
utput
s
AC Power
I
nput

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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 5.2.2 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.

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5.2 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 supported tools and software
variants are listed there. Please visit this page periodically to check for tool/software updates.
Isolated on-board debugger provides the USB to UART bridge between the PC and the target iMOTION™ device
with 1kV DC galvanic isolation between the motor drive system (hot side) and the PC/debugger (cold) side. On-
board debugger uses the SEGGER J-Link 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”.
5.2.1 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 6 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 Application Note 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 6.
Figure 6 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.
There is a very limited number of parameters which are specific to the control board or power board hardware.

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Table 8 provides the MCEWizard setup overview for hardware related parameters specific to EVAL-M1-36-44A
power board. Similar tables will be available in each control board’s Application Note. 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 8 MCEWizard setup overview table
Page Parameter Value Comment
Welcome Page Control Board selecting EVAL-M1-101T for example
Welcome Page Power Board selecting EVAL-M1-36-44A 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 200V
Question 23 DC Bus Sensing High Resistor 2000 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 7.
Figure 7 Verify and Save page for MCEWizard

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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.
5.2.2 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 Figure 8.
Figure 8 MCEDesigner’s Main Display for EVAL-M1-101T
To program Drive System Parameter file 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 9.
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 9 “Program IMC Controller” pop-up window

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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
speed, 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 or M3 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 10. 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 10 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).

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ematics and Layout
6 Schematics and Layout
To meet individual customer requirements and make the EVAL-M1-36-44A evaluation board a basis for
development or modification, all essential technical data like schematics, layout and components are included
in this chapter. Get in contact with our technical support team to get more detailed information and the latest
Gerber-files.
6.1 DC-Link Voltage Measurement
Pin 14 of connector J4 provides access to the DC-link voltage. Three possible feedback cases are associated
with this pin. Figure 11 provides the DC bus sense resistor details. By default, the resistor R5 is not mounted on
EVAL-M1-36-44A. There must be a pull-down resistor mounted on the corresponding controller board.
Figure 11 DC bus sense resistors in EVAL-M1-36-44A evaluation board
R5
4.87K (DNI)
R2
1.00M
R1
1.00M
DCP
DCBSENSE

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Schematics and Layout
6.2 Inverter section using CIPOS™ Nano IPM
The inverter section is implemented using the CIPOS™ as displayed in Figure 12. The module includes six power
MOSFETs and three half bridge gate drivers.
The three capacitors C71, C72 and C73 are used as bootstrap capacitors to provide the necessary floating
supply voltages VBS1, VBS2 and VBS3 respectively.
Figure 12 Schematic of the 3-phase inverter section using CIPOS™ Nano IPM on EVAL-M1-36-44A
board
R27
4.7K
R28
4.7K
R29
4.7K
R30
4.7K
R31
4.7K
R32
4.7K
C17
0.1uF, 25V
VCC
U
V
W
PWMUH
PWMVH
PWMWH
PWMUL
PWMVL
PWMWL
R35 680k
C26
470pF
C9
1uF, 25V
C7
1uF, 25V
C6
1uF, 25V
R26
1K
+3.3V
C25
100pF
RS1
0.5, 1%
RS2
0.5, 1%
RS3
0.5, 1%
R3
1k
R4
1k
R6
1k
I_U
I_V
I_W
1
TP3
GND
1
TP2
DCP
V Trip
1
TP11
UL
1
TP10
WH
1
TP9
VH
1
TP8
UH
1
TP13
VL
1
TP14
WL
DCP
PWMUH
PWMVH
PWMWH
PWMUL
PWMVL
PWMWL
1
TP15
FLT/EN
GND
DCP
+3.3V
VCC
R8
DNI
R7
DNI
I_U
I_V
I_V
I_W
1
TP4
GND
nFLT/EN
1
TP12
VCC
B
33
34
35
36
1
4
3
6
2
7
8
V+
VB2
V, VS2
VB3
W, WS3
LO3
LO2
LO1
5
HO1
VB1
VB2
VS1
VS2
HO2
VB3
VS3HO3
COM
VSS
VCC
HIN1
HIN2
HIN3
LIN2
LIN1
F
LIN3
EN
ITRIP RCIN
IRS28364D
Driver IC
VR3
VR2
VR1
HIN1
VCC
HIN3
HIN2
LIN1
LIN3
LIN2
FLT
ITRIP
VSS,COM
RCIN
U
VB1
9
16
10
32
12
14
18
21
37
EN
31
VS1
13
15
22
11
17
19
23
24
25
26
27
28
29
40
20
30
Q1
IRSM836-
044MA
C1
11nF/500V
C2 11nF/500V
U
V
W
1
2
3
J2
KF128-7.5-
3P
C14
10uf/50v
Note:
if single shunt solution is
adopted please use
R7=R8=0ohm resistor and
remove both RS2 and RS3

User Manual 20 Revision 1.0
2019-07-25
EVAL-M1-36-44A User Manual
iMOTION™ Modular Applic
ation Design Kit
Schematics and Layout
6.3 Current Measurement and Over Current Circuit
The resistors RS1 to RS3 are purposed to generate a voltage proportional to the emitter current. These voltages
are available at 20 pin interface connector to give feedback to the controller. In combination with resistors R70
to R72 they are used to generate common current signal V_TRIP for all three phases. V_TRIP is always on
highest level of all three phase current. This signal is used to generate gate-kill signal I_TRIP.
Figure 13 is the over current circuitry shown. Capacitor C32 and resistor R39 are filtering voltage spikes and
noise on V_TRIP to avoid incident turn off.
The comparator threshold can be set through the voltage divider provided by resistors R36 and R40. By default
for emitter-shunt trip, R40 is 3.2k

.
Figure 13 Over current protection circuit on the EVAL-M1-36-44A evaluation board
C32
470pf
C30
0.1uf
R40
3.2k,1%
R36
31.0k
C33
0.01uf
R39
1k
R38
4.7K
3
2
1
8
4
U5A
Comment: LM393A
+3.3V
VCC
5
6
7
U5B
Comment: LM393A
+3.3V
GATEKILL level set at:
2k/33k * 3.3V = 0.2V
0.2V/0.5Ohms * 3 = 1.2A
1
TP17
ITRIP
C31
0.1uf
V Trip
1
TP16
V_TRIP
ITRIP
R36:
For single shunt use 10k
For leg shunts use 31k
1
TP18
Par1
+3.3V
R37
4.7k
R41
4.7k