PRD-06995 CRD25DA12N-FMC 25 kW Three Phase Inverter

Product Information

Product Name: CRD25DA12N-FMC 25 kW Three-Phase
Inverter

Manufacturer: Wolfspeed, Inc.

Model: CRD25DA12N-FMC 25 kW

User Guide: PRD-07560

Address: 4600 Silicon Drive Durham, NC 27703, USA

Languages: English, Mandarin, Japanese

Temperature Range: -40°C to 105°C

Website: https://forum.wolfspeed.com/

Product Usage Instructions

Caution: Please carefully review the following pages as
they contain important information regarding the hazards and safe
operating requirements related to the handling and use of this
board.

Please ensure that appropriate safety procedures are followed
when operating this board. Failure to do so may result in hazards
or improper functioning.

1. Introduction

The CRD25DA12N-FMC is a three-phase inverter with a block
diagram shown in Figure 1.

2. Design Features

The design features of the CRD25DA12N-FMC include:

• Single CCB021M12FM3 (1200 V / 21 m) Wolfspeed WolfPACKTM
  six-pack power module

• General purpose controller with customizable firmware

• Integrated hall-effect current measurements

• Integrated resolver circuitry for rotational position
  feedback

• Isolated substrate temperature measurement

• Isolated CAN communication for real-time monitoring and
  adjustments

• Separate turn-on and turn-off gate resistors for switching loss
  optimization

• DC bus and phase voltage measurement circuitry

• Dedicated overcurrent detection hardware

• Spare GPIO and ADC header pins for adding custom auxiliary
  hardware

• Spare LEDs for customization during testing and evaluation

• Controllable current amplifier for operating external
  relays

• Detailed characterization of the thermal solution for improved
  simulation predictions

• Integrated gate measurement connectors for easy system
  troubleshooting and evaluation

Table 1 provides the ratings of the CRD25DA12N-FMC:

2.1. Subsystem Functional Groups

The evaluation board consists of several subsystems, as
described in Table 2:

[Insert description of the subsystems here]

USER GUIDE PRD-07560
CRD25DA12N-FMC 25 kW Three-Phase Inverter
CRD25DA12N-FMC 25 kW CRD25DA12N-FMC 25 kW

User Guide Wolfspeed Power Applications

Wolfspeed, Inc. 4600 Silicon Drive Durham, NC 27703, USA

4600 Silicon Drive Durham, NC 27703, USA

4600 Silicon Drive Durham, NC 27703, USA

This document is prepared as a user guide to install and operate Wolfspeed® evaluation hardware.

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 1 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

All parts of this application note are provided in English, and the Cautions are provided in English, Mandarin, and Japanese. If the end user of this board is not fluent in any of these languages, it is your responsibility to ensure that they understand the terms and conditions described in this document, including without limitation the hazards of and safe operating conditions for this board.
“”

Note: This Wolfspeed-designed evaluation hardware for Wolfspeed® components is a fragile, high-voltage, hightemperature power electronics system that is meant to be used as an evaluation tool in a lab setting and to be handled and operated by highly qualified technicians or engineers. When this hardware is not in use, it should be stored in an area that has a storage temperature ranging from -40° Celsius to 105° Celsius. If this hardware is transported, to avoid any damage to electronic components, special care should be taken during transportation to avoid damaging the board or its fragile components and the board should be transported carefully in an electrostatic discharge (ESD) bag, or with ESD or shorting protection that is the same as, or similar to, the protection that is or would be used by Wolfspeed when shipping this hardware. Please contact Wolfspeed at https://forum.wolfspeed.com/ if you have any questions about the protection of this hardware during transportation. The hardware does not contain any hazardous substances, is not designed to meet any industrial, technical, or safety standards or classifications, and is not a production-qualified assembly.
Wolfspeed -40oC~105oC https://forum.wolfspeed.com/
-40105 ESD https://forum.wolfspeed.com/
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 2 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

CAUTION PLEASE CAREFULLY REVIEW THE FOLLOWING PAGES, AS THEY CONTAIN IMPORTANT INFORMATION REGARDING THE HAZARDS AND SAFE OPERATING REQUIREMENTS RELATED TO THE HANDLING AND USE OF THIS BOARD.

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 3 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

CAUTION
DO NOT TOUCH THE BOARD WHEN IT IS ENERGIZED AND ALLOW THE BULK CAPACITORS TO COMPLETELY DISCHARGE PRIOR TO HANDLING THE BOARD. THERE CAN BE VERY HIGH VOLTAGES PRESENT ON THIS EVALUATION BOARD WHEN CONNECTED TO AN ELECTRICAL SOURCE, AND SOME COMPONENTS ON THIS BOARD CAN REACH TEMPERATURES ABOVE 50° CELSIUS. FURTHER, THESE CONDITIONS WILL CONTINUE FOR A SHORT TIME AFTER THE ELECTRICAL SOURCE IS DISCONNECTED UNTIL THE BULK CAPACITORS ARE FULLY DISCHARGED.
Please ensure that appropriate safety procedures are followed when operating this board, as any of the following can occur if you handle or use this board without following proper safety precautions:
Death Serious injury Electrocution Electrical shock Electrical burns Severe heat burns You must read this document in its entirety before operating this board. It is not necessary for you to touch the board while it is energized. All test and measurement probes or attachments must be attached before the board is energized. You must never leave this board unattended or handle it when energized, and you must always ensure that all bulk capacitors have completely discharged prior to handling the board. Do not change the devices to be tested until the board is disconnected from the electrical source and the bulk capacitors have fully discharged.
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 4 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

50
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 5 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

50 :
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 6 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

CONTENTS
1. INTRODUCTION………………………………………………………………………………………………………………………..8 2. DESIGN FEATURES ……………………………………………………………………………………………………………………9
2.1. Key System Specifications ………………………………………………………………………………………………..9 2.2. Subsystem Functional Groups…………………………………………………………………………………………10 2.3. I/O Pinout………………………………………………………………………………………………………………………12 3. SYSTEM DESCRIPTION …………………………………………………………………………………………………………….19 3.1. Power Stage…………………………………………………………………………………………………………………..20 3.2. Gate Drivers …………………………………………………………………………………………………………………..23 3.3. Current Sensing ……………………………………………………………………………………………………………..25 3.4. Voltage Sensing ……………………………………………………………………………………………………………..27 3.5. NTC……………………………………………………………………………………………………………………………….29 3.6. Position Sensing …………………………………………………………………………………………………………….29 3.7. Additional Circuitry ………………………………………………………………………………………………………..31 3.8. Controller………………………………………………………………………………………………………………………33 4. MECHANICAL ASSEMBLY………………………………………………………………………………………………………….37
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 7 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

1. INTRODUCTION
This user guide provides an overview of Wolfspeed’s CRD25DA12N-FMC 25 kW three-phase inverter reference design including key system specifications, sub-system functional descriptions, performance test data, and mechanical assembly. The CRD25DA12N-FMC design was developed to provide power electronics engineers with a hardware evaluation platform and reference design files to support early design-in activities of the Wolfspeed WolfPACKTM baseplate-less power module platform. In conjunction with this user guide, the complete suite of reference design files including schematics, PCB layout, Gerber files, BOM, and 3D CAD files are available for download from the CRD25DA12N-FMC landing page on Wolfspeed’s website. The CRD25DA12N-FMC is a complete, easy-to-use, flexible power stage designed around the CCB021M12FM3 (1200 V / 21 m) Wolfspeed WolfPACKTM six-pack power module. As demonstrated in the block diagram below, this design intends to provide everything needed to quickly evaluate performance out of the box while also providing the resources to expand its capabilities to suit target end-application needs. To this end, included on this single-PCB solution is DC bus capacitance with low-inductance power planes, gate drivers, current and voltage sensing, thermal management, and various control peripherals. By default, the CRD25DA12N-FMC is designed to be evaluated as a simple three-phase inverter topology, but the flexibility of the generic power stage makes it simple to adapt to other applications. As such, the design is ideal for evaluating or scaling up to higher power levels in industrial motor drives, power supplies, and renewable energy applications, or as the bi-directional active front end (AFE) stage for off-board electric vehicle (EV) fast charging.
Figure 1: CRD25DA12N-FMC Block Diagram
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 8 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

2. DESIGN FEATURES
This section highlights the design features of the CRD25DA12N-FMC design including key system specifications, a description of the various functional circuit groups, and a general I/O pinout definition.

2.1. Key System Specifications

·

Single CCB021M12FM3 (1200 V / 21 m) Wolfspeed WolfPACKTM six-pack power module

·

General purpose controller with customizable firmware

·

Integrated hall-effect current measurements

·

Integrated resolver circuitry for rotational position feedback

·

Isolated substrate temperature measurement

·

Isolated CAN communication for real-time monitoring and adjustments

·

Separate turn-on and turn-off gate resistors for switching loss optimization

·

DC bus and phase voltage measurement circuitry

·

Dedicated overcurrent detection hardware

·

Spare GPIO and ADC header pins for adding custom auxiliary hardware

·

Spare LEDs for customization during testing and evaluation

·

Controllable current amplifier for operating external relays

·

Detailed characterization of the thermal solution for improved simulation predictions

·

Integrated gate measurement connectors for easy system troubleshooting and evaluation

Table 1: CRD25DA12N-FMC Ratings

Symbol

Parameter

POUT Output Power

VDC

DC Bus Voltage

VAUX Low-Power Auxiliary Voltage

IAUX

Low-Power Auxiliary Current

IOUT

Output Phase Current

fs

Switching Frequency

Min. — — 10.8 — — —

Typ. — 800 12 — — 20

Max. 25 1000 13.2 5 30 100

Unit kW
V
A ARMS kHz

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 9 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

2.2. Subsystem Functional Groups
The figures below show the system blocks that makeup the evaluation board from a top-side perspective and a side view. Table 2 describes each labelled subsystem.
Figure 2: CRD25DA12N-FMC Top View
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 10 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

Figure 3: CRD25DA12N-FMC Side View Table 2: Subsystem Functional Group Descriptions
Label Description A Input DC Voltage Terminals B MOSFET Gate Drivers C Gate Measurements D Current Sensors E Output AC Voltage Terminals F Phase Voltage Feedback G Isolated NTC Circuit
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 11 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

Label Description

H Control Card

I

Isolated CAN

J Spare ADCs and GPIOs

K Fan Power

L Relay Control

M Encoder Feedback

N +12V Input Power

O Bulk DC-Link Capacitor

P Aluminum Heatsink

Q Wolfspeed CCB032M12FM3 SiC 1.2kV Six-Pack Module

2.3. I/O Pinout
The design features a variety of ports for connecting external sensors, controlling external hardware, and communicating directly with the onboard controller. Each of these interfaces will be discussed in the later sections of this document. This section provides a quick reference to the pinouts of the various ports.
Aux Power Connector Pinout
The controller and auxiliary low-voltage hardware are powered from an external +12V supply. The power is applied through a CUI Devices PJ-102AH barrel connector with the pinout shown in. The recommended mating connector is CUI Devices PP3-002A.

2 1

Figure 4: J20 Input Power Connector Pin Numbers
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 12 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

Table 3: J20 Input Power Connector Pinout

Pin # 1 2

Name +12V GND

Type Power Power

Description +12V Power
Ground

High Power Terminals
The high-power input DC bus and output phase connections are made through Würth Elektronik 7460307 terminals. These terminals include internal M4 threads to support mounting high-power wires or bus bars directly to the terminals with M4 screws.

Voltage Feedback Connector Pinout
The voltage feedback uses a Phoenix Contact 1755778 connector with the pinout shown below. The recommended mating connector is either Phoenix Contact 1792799 or Phoenix Contact 1757051, depending on the desired orientation of the wires. Using Phoenix Contact 1792799 results in wires that are parallel with the circuit board, and using Phoenix Contact 1757051 results in wires that are perpendicular to the circuit board.

654321

Figure 5: J1 Voltage Feedback Connector Pin Numbers Table 4: J1 Voltage Feedback Connector Pinout

Pin # 1 2 3 4 5 6

Name U+ UV+ VW+ W-

Type

Description

Analog (I) Positive Differential Phase U Voltage Feedback

Analog (I) Negative Differential Phase U Voltage Feedback

Analog (I) Positive Differential Phase V Voltage Feedback

Analog (I) Negative Differential Phase V Voltage Feedback

Analog (I) Positive Differential Phase W Voltage Feedback

Analog (I) Negative Differential Phase W Voltage Feedback

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 13 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

CAN Port Pinout
The isolated CAN port is a standard male DB9 connector (Amphenol L717SDE09PA4CH4RC309) with the pinout shown in below. This CAN port can be mated with any standard DB9 female connector.

1

5

6

9

Figure 6: J4 CAN Port Pin Numbers Table 5: J4 CAN Port Pinout

Pin # 1 2 3 4 5 6 7 8 9

Name NC0 CAN_L VNC1 SHLD O(V-) CAN_H NC2 V+

Type —
Digital (I/O) Power — Power —
Digital (I/O) —
Power

Description No Connect Isolated CAN Low Isolated Ground No Connect Isolated Ground No Connect Isolated CAN High No Connect Isolated +5V Power

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 14 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

Resolver Connector Pinout
The design includes circuitry to attach a resolver for mechanical position feedback. The connector is Würth Elektronik 61200621621 with the pinout shown below. Although any 0.1 in (2.54 mm) female header connector can be used to attach the resolver, it is recommended to use a connector with a matching shroud to ensure proper orientation when attaching the resolver.

2

6

1

5

Figure 7: J16 Resolver Connector Pin Numbers Table 6: J16 Resolver Connector Pinout

Pin # 1 2 3 4 5 6

Name EXC_P EXC_N SIN_P SIN_N COS_P COS_N

Type

Description

Digital (O) Positive Differential Resolver Excitation Signal

Digital (O) Negative Differential Resolver Excitation Signal

Analog (I) Positive Differential Signal Resolver Sine Feedback

Analog (I) Negative Differential Signal Resolver Sine Feedback

Analog (I) Positive Differential Signal Resolver Cosine Feedback

Analog (I) Negative Differential Signal Resolver Cosine Feedback

Relay Connector Pinout
The design includes circuitry to drive external relays. The connectors for these relays are Phoenix Contact 1755778 with the pinout shown below. The recommended mating connector is either Phoenix Contact 1792757 or Phoenix Contact 1754449, depending on the desired orientation of the wires. Using Phoenix Contact 1792757 results in wires that are parallel with the circuit board, and using Phoenix Contact 1754449 results in wires that are perpendicular to the circuit board.

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 15 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

1 21 2

Figure 8: J11 and J15 Relay Connector Pin Numbers Table 7: J11 and J15 Relay Connector Pinout

Pin # 1 2

Name +12V GND

Type Power Power

Description +12V Power Controlled Ground

Spare Connector Pinout
The design includes spare input/output pins which are connected directly to the controller following the pinout shown below. The connector part number is Würth Elektronik 61301221121. The headers use standard 0.1 in (2.54 mm) spacing between the pins, so any female header pins with this spacing can be used for mating.

12

11 12
Figure 9: J8 Spare Connector Pin Numbers
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 16 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

Table 8: J8 Spare Connector Pinout

Pin # 1 2 3 4 5 6 7 8 9 10 11 12

Name +3.3V +5V GND GND A14 C14 GPIO35 GPIO44 GPIO54 GPIO55 GND +12V

Type

Description

Power +3.3V Power

Power +5V Power

Power Ground

Power Ground

Analog (I) Connected to Controller Analog A14

Analog (I) Connected to Controller Analog C14

Digital (I/O) Connected to Controller GPIO35

Digital (I/O) Connected to Controller GPIO44

Digital (I/O) Connected to Controller GPIO54

Digital (I/O) Connected to Controller GPIO55

Power Ground

Power +12V Power

Metrology
This design includes a variety of test points and probe connection points to measure various signals on the board in order to evaluate the design and test various control schemes.
To measure the gate signals, each of the six MOSFETs are connected to a dedicated MMCX connector, which are connected across the MOSFET gate and source terminals. These measurements use Molex 0734151471 connectors and are in the locations shown below. These are standard MMCX connectors intended to be monitored directly with an oscilloscope probe. Notably, during system operation, the gate measurements can float at the full bus voltage. Therefore, the gate measurements should not be monitored using single-ended oscilloscope probes due to the safety risks of high-voltage potentials being applied to the oscilloscope reference. It is recommended to perform these gate measurements with high-isolation probes such as the Tektronix IsoVu series of probes.
The design also includes several through-hole test points to measure the high- power connections and the lowpower voltage rails. These test points are in the physical locations indicated in the figure below and are connected to the signals described in Table 9. The test points can be used to perform a variety of measurements such as measuring the output phase voltages, the DC-bus voltage, and/or the auxiliary power rails.

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 17 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

TP1

TP2

TP3

TP4

J5

J6

J7

GATE1 GATE3 GATE5

U-HIGH V-HIGH W-HIGH

J12 GATE2 U-LOW

J13 GATE4 V-LOW

J14 GATE6 W-LOW

TP10

TP11

TP12

TP8 TP9 TP13

TP5 TP6 TP7 TP14 TP15

Figure 10: Gate and Test Point Measurement Locations Table 9: Test Point Descriptions

Ref Designator TP1 TP2 TP3 TP4

Signal DC+ DC+ DCDC-

Color

Description

Red Positive DC-Link Voltage

Red Positive DC-Link Voltage

Black Negative DC-Link Voltage

Black Negative DC-Link Voltage

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 18 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

TP5 TP6 TP7 TP8 TP9 TP10 TP11 TP12 TP13 TP14 TP15

+3.3V +5V GND +15V -15V U_OUT V_OUT W_OUT GND +12V GND

Red +3.3V Power Red +5V Power Black Ground Red +15V Power Red -15V Power White U Phase White V Phase White W Phase Black Ground Red +12V Power Black Ground

3. SYSTEM DESCRIPTION

CAUTION
IT IS NOT NECESSARY FOR YOU TO TOUCH THE BOARD WHILE IT IS ENERGIZED. WHEN DEVICES ARE BEING ATTACHED FOR TESTING, THE BOARD MUST BE DISCONNECTED FROM THE ELECTRICAL SOURCE AND ALL BULK CAPACITORS MUCH BE FULLY DISCHARGED.
SOME COMPONENTS ON THE BOARD REACH TEMPERATURES ABOVE 50 CELSIUS. THESE CONDITIONS WILL CONTINUE AFTER THE ELECTRICAL SOURCE IS DISCONNECTED UNTIL THE BULK CAPACITORS ARE FULLY DISCHARGED. DO NOT TOUCH THE BOARD WHEN IT IS ENERGIZED AND ALLOW THE BULK CAPACITORS TO COMPLETELY DISCHARGE PRIOR TO HANDLING THE BOARD.
PLEASE ENSURE THAT APPROPRIATE SAFETY PROCEDURES ARE FOLLOWED WHEN OPERATING THIS BOARD AS SERIOUS INJURY, INCLUDING DEATH BY ELECTROCUTION OR SERIOUS INJURY BY ELECTRICAL SHOCK OR ELECTRICAL BURNS, CAN OCCUR IF YOU DO NOT FOLLOW PROPER SAFETY PRECAUTIONS.
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 19 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

50

50

3.1. Power Stage
The power stage of this design uses three 65 F low-inductance capacitors in parallel to form a total of 195 F of DC-link capacitance. The capacitors used are KEMET C4AQQEW5650A3BJ film capacitors with a voltage rating of 1.1 kV. They are charged through the input DC terminals and connect directly to the DC+ and DC- terminals of the power module using low-inductance copper pours. The DC-link capacitor circuitry and the connections to the power module are shown in the figures below. The printed circuit board used in this design features interleaved DC+ and DC- copper layers to increase the flux cancellation between layers and reduce the inductance between the capacitors and the power module input pins. The interleaved layers are indicated in the stack-up shown in Table 10, which shows the signals/planes on each circuit board layer in the area around the DC bus.
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 20 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

Figure 11: DC Bus Circuitry
Figure 12: Wolfspeed CCB021M12FM3 Power Module Circuit Connections
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 21 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

Table 10: DC Bus Printed Circuit Board Layer Stack-up

Layer # 1 2 3 4 5 6

Primary Signals Gate Source DCDC+ DCDC+

To ensure that the system is stored at a safe touch potential, the design includes bleed resistors which discharge the bus to less than 50 V in under 3 minutes when input voltage is removed from the system. These resistors are connected to the DC bus at all times to ensure the bus is always depleted after system shut down. The circuit bleed resistors are shown below.

Figure 13: Bleed Resistors Connected to DC Bus
The output of each phase is independently measured with a hall-effect current transducer between the power module and the output power terminals of the PCB, as shown below. These connections feature wide copper pours to minimize inductance and maximize ampacity. These measurements provide feedback to the controller for detecting overcurrent events and for close-loop system control. These sensors and the corresponding measurement circuitry are discussed in more detail in the Current Sensing section of this document.
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 22 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

Figure 14: Output Hall-Effect Sensor Power Connections
3.2. Gate Drivers
Each of the MOSFET switch positions is driven with a dedicated power supply and gate driver integrated circuit (IC), both of which have continuous isolation barriers of over 2 kV. The circuit for one switch position is shown in the figure below. To prevent undesired coupling, there is an isolation gap between the controller signals and the high-voltage MOSFET connections. No copper crosses this isolation barrier, and the only components which cross the barrier are the isolated power supplies and gate driver ICs. The power supplies generate the isolated +15 V and -3 V rails required to properly bias the MOSFET gates and enough power to drive the MOSFETs at high switching frequencies.
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Figure 15: Gate Driver Circuit for One MOSFET Switch Position
For the gate driver IC, the design uses the Texas Instruments UCC5350SBD isolated gate driver, which has a sink/source drive strength of ±5 A. The selected gate driver IC includes a split output capable of sinking/sourcing current through separate turn-on and turn-off gate resistor. The split output allows users to independently optimize the turn-on and turn-off switching losses and edge rates. In traditional single output circuits, the same gate resistor must be used for both transition states, which could result in increased switching losses. By default, this design employs a 0.91 turn-on resistor and a 0 turn-off resistor, though these values can easily be changed by a user to reach the desired performance targets. The gate driver circuit includes input signal interlocks which prevent the IC from turning on when the high-side and low-side switch positions are simultaneously commanded on. This feature enables users to confidently evaluate prototype control software without the risk of shoot-through due to command errors from the controller. The gate driver IC also includes other built-in functionalities such as undervoltage lockout, low propagation delay, and high common-mode transient immunity. Some of the general specifications of the gate driver used in this design are shown in Table 11, and more details about the built-in features of the gate driver IC can be found in the Texas Instruments UCC5350SBD datasheet.
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 24 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

Table 11: Gate Driver Operating Parameters

Symbol

Parameter

Min.

Typ.

Max.

Unit

PDRIVE

Power Per Gate Driver1

—

—

1.7

W

IO

Output Peak Current (TA = 25 °C)

—

—

±5

A

VGATE,HIGH VGATE,LOW

High Level Output Voltage Low Level Output Voltage

—

15

—

V

—

-3

—

RG(EXT)-ON

External Turn-On Resistance

—

0.91

—

RG(EXT)-OFF

External Turn-Off Resistance

—

0

—

1 The gate driver power supply can be populated with Murata Power Solutions Inc. MGJ2D121503SC or with RECOM R12P21503D. This rating is the worse-case value of the two options.

3.3. Current Sensing
Each phase output of this design is directly measured using LEM LAH 50-P closed-loop hall-effect transducers capable of measuring up to 50 ARMS with a rated bandwidth of 200 kHz. These sensors can be employed for custom closed- loop control schemes and/or overcurrent protection. The LEM LAH 50-P transducer has an insulation voltage rating of 1000 V between the primary and secondary circuits, enabling this sensor to be employed without requiring additional isolation. These sensors output a proportional current rather than a proportional voltage since an output current signal has improved immunity against electrical noise. Additionally, compared to open-loop transducers, closed-loop transducers are favored due to their higher accuracy and lower temperature drift. The maximum output phase current of this design is 30 ARMS which is safely within the operating range of the selected sensors. In order to drive these hall-effect sensors, this design includes bipolar ±15 V power rails which power the sensors. The power connections for one of the hall- effect transducers are shown below.

Figure 16: Hall-Effect Transducer Power Connections
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The current signal output from the hall-effect transducers is converted to a voltage, filtered, and scaled before being sensed with dedicated analog-to- digital converter (ADC) inputs on the controller. The voltage conditioning for the current sensors is shown in the figures below.
Figure 17: Current Measurement Conversion to Voltage and Filtering
Figure 18: Current Measurement Conditioning In additional to the ADC measurements, the filtered current signals are also connected directly to comparators for detecting overcurrent events (both positive and negative magnitude currents). This circuitry enables users to shut the system down if the system enters an unsafe or undesired operating condition. Notably, the overcurrent detection could instead be employed using the controller ADC measurements. These hardwaredefined overcurrent circuits enable users to evaluate alternative approaches when computing power and/or available input pins are limited. An example of the overcurrent detection circuit for one phase is shown below. The overcurrent trip limits can be adjusted by varying the reference resistors, R66, R67, R71, and R73 shown in the reference voltage circuit below.
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Figure 19: Overcurrent Detection Circuit
Figure 20: Overcurrent Trip References
3.4. Voltage Sensing
The design includes the built-in hardware necessary to perform differential voltage measurements of the DC bus. These connections are included on the circuit by default, so users do not need to add any hardware connections for this functionality. In many configurations, this DC bus measurement can be paired with the phase current measurements to operate the design in closed- loop mode. The DC voltage conditioning circuit is shown below.
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Figure 21: Differential DC Voltage Conditioning For control schemes where phase voltages are required, the design also includes the hardware necessary to perform differential voltage measurements of the output signals. These differential inputs can be placed close to the target load and can measure the output voltage as line-to-line or line-to-neutral. These measurements have multiple target use cases depending on the application. For example, these measurements can be used to directly monitor the voltages applied to the terminals of a motor. Alternatively, the feedback voltage signals could be used to measure input line voltages if this design is utilized as a building block for an active front end (AFE). These phase voltage measurements are not required in many control schemes but are included for users who want to evaluate control schemes which require them. The voltage conditioning circuit for one phase is shown below.
Figure 22: Differential Phase Voltage Conditioning
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3.5. NTC
The CCB021M12FM3 power module used in this design includes a negative temperature coefficient (NTC) sensor for monitoring the substrate temperature inside the module. While this temperature is not the junction temperature of the MOSFETs, this measurement can be employed to estimate the device temperatures and detect problematic operating conditions. This design has provisions to directly measure the power module NTC. The circuit converts the voltage to a digital 50 kHz pulse-width modulated (PWM) signal with varying duty cycle. The PWM signal is processed through a digital isolator and the output signal can be directly measured by the controller. The duty cycle varies depending on the measured NTC temperature and follows
= -(4.26587 × 10-4)3 + 0.06070832 – 4.24309 + 216.674 where is the measured duty cycle [0-100] and is the calculated temperature [°C]. This relationship was fit to experimental data. The NTC circuit used in this design is shown below.
Figure 23: NTC Measuring Circuit
3.6. Position Sensing
This design includes provisions for measuring the mechanical position of a motor or other rotating device through a resolver sensor. The resolver is a common position measuring technique due to its few electrical components which enables operation in high vibration environments. To operate a resolver, an excitation sinusoidal signal is sent to the resolver and the resolver sensor returns the cosine and sine signals related to the sensor position. For the excitation signal in this design, the controller generates a PWM signal which is converted with on-board hardware to a sinewave and amplified. These excitation circuits are shown below.
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Figure 24: Resolver PWM to Sinewave
Figure 25: Resolver Excitation Amplifier
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The sine and cosine differential feedback signals from the resolver are conditioned through an operational amplifier circuit to filter them and to center the signals at 1.5V rather than 0V. With this adjustment, the signals can be measured directly with the ADCs of the +3.3V controller. The conditioning circuit for the sine feedback is shown in below.
Figure 26: Resovler Sine Signal Conditioning
3.7. Additional Circuitry
The circuit includes several provisions for customization by a user to fit specific application needs. Along with the ability for swapping the controller and loading firmware off the board, this circuit includes hardware connections for attaching additional sensors and equipment based on customization needs. First, this circuit includes three LEDs with no predefined functionality. The three LEDs vary in color (green, yellow, red) allowing users to add custom warnings or feedback during system initialization and testing. These LEDs are shown below.
Figure 27: Customizable LEDs
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Second, this design includes exposed header pins which connect to multiple analog-to-digital converter (ADC) pins and general-purpose input/output (GPIO) pins of the controller. Similar to the LEDs, these pins do not serve an inherent function and instead serve to provide users with easy access to controller pins and therefore to customization opportunities. By default, each signal is connected to a 0 resistor and a not populated filter capacitor. Depending on the application, various resistor and capacitor sizes can be soldered to introduce a hardware-level filter. The spare connector headers also include a direct link to the three power rails on the circuit board (+3.3V, +5V, and +12V) and multiple ground connections so users can power a variety of external circuits or sensors. The circuit for these connections is shown below.
Figure 28: Spare ADCs, GPIOs, and Power Rail Connections Third, the circuit board supports operating two external +12V relays for applications such as incorporating the circuit into an overall larger fault detection setup. For example, the circuit can drive relays can be used in series with a fault circuit or emergency shutdown equipment so a fault can be triggered in a higher-level system. Alternatively, the circuit can drive relays to operate higher-power equipment such as charge/discharge relays or in-rush current limiting equipment. Although the circuit was intended to drive relays, these connections can be used to drive any higher current equipment. Each relay connection is attached to a freewheeling diode and a low-side controlled transistor capable of operating up to 8A. However, this current is primarily limited by the input +12V power connector which is pin limited to 5A for the entire +12V rail, assuming that a suitable input power supply is used to power the circuit. If high currents are required for the external relay circuit, it is recommended to power those with another power source (other than this circuit board) and simply use these outputs to control the circuit. These relay driving circuits are designed to be general in nature and thus their purpose can be customized based on specific application needs. The relay driving circuit is shown below.
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Figure 29: Relay Driving Circuit
3.8. Controller
The controller connector is Samtec HSEC8-160-01-L-DV-A-BL with the pinout shown below. The system has been tested with the Texas Instruments TMDSCNCD280039C controller. However, any controller with equivalent pinout could be utilized.

119

1

120

2

Figure 30: U5 Controller Connector Pin Numbers

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Table 12: U5 Controller Connector Pinout

Name

Type Description

Description Type

Name #

1

NC

—

No Connect

No Connect

—

NC

2

3

NC

—

No Connect

No Connect

—

NC

4

5

NC

—

No Connect

No Connect

—

NC

6

7

GND_0

Power

Ground

9

VU_MEAS

Analog (I)

U Differential Voltage Meas.

11

VV_MEAS

Analog (I)

V Differential Voltage Meas.

13 GND_2

Power

Ground

No Connect Ground
No Connect No Connect

— Power
— —

NC

8

GND_1 10

NC

12

NC

14

15

NC

—

No Connect

17

VW_MEAS

Analog (I)

W Differential Voltage Meas.

19 GND_4

Power

Ground

21

VDC_MEAS

Analog (I)

DC Differential Voltage Meas.

23

NC

—

No Connect

Ground No Connect No Connect
Ground No Connect

Power — —
Power —

GND_3 16

NC

18

NC

20

GND_5 22

NC

24

25

NC

—

No Connect

No Connect

—

NC

26

27

NC

—

No Connect

No Connect

—

NC

28

29 GND_6

Power

Ground

Resolver Sine Feedback

Analog (I)

SIN

30

31

NC

—

No Connect

No Connect

—

NC

32

33 IU_MEAS Analog (1) U Current Meas.

Resolver Cosine Feedback

Analog (I)

COS

34

Spare

35 GND_7

Power

Ground

Controller Analog (I)

A14

36

Analog Input

37 IV_MEAS Analog (I) V Current Meas.

Ground

Power

GND_8 38

Spare

39 IW_MEAS Analog (I) W Current Meas.

Controller Analog (I)

C40

40

Analog Input

41

NC

—

No Connect

No Connect

—

NC

42

43

NC

—

No Connect

No Connect

—

NC

44

45

NC

—

No Connect

Ground

Power

GND_9 46

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Name

Type Description

47 GND_10

Power

Ground

49

U_HS_PWM

Digital (O)

High-Side Phase U PWM Control

51

U_LS_PWM

Digital (O)

High-Side Phase U PWM Control

53

V_HS_PWM

Digital (O)

High-Side Phase V PWM Control

55

V_LS_PWM

Digital (O)

Low-Side Phase V PWM Control

Description Type

Name #

+5V Power

Power

5V_0

48

High-Side Phase W PWM Control

Digital (O)

W_HS_PWM

50

Low-Side Phase W PWM Control

Digital (O)

W_LS_PWM

52

No Connect

—

NC

54

No Connect

—

NC

56

57

NTC_ISO

Digital (I)

Temperature PWM Meas.

59

NC

—

No Connect

61

NC

—

No Connect

63

NC

—

No Connect

65 GND_11

67

NC

69

NC

71

NC

Power — — —

Ground No Connect No Connect No Connect

73

NC

—

No Connect

75

NC

—

No Connect

77

NC

—

No Connect

79

U_HI_OC

Digital (I)

Phase U High Overcurrent

81

U_LO_OC

Digital (I)

Phase U Low Overcurrent

83 GND_12

Power

Ground

85

NC

87 CAN_RX

—
Digital (I/O)

No Connect
Non-isolated CAN RX

89

NC

—

No Connect

91

V_HI_OC

Digital (I)

Phase V High Overcurrent

No Connect

—

NC

58

No Connect

—

NC

60

No Connect

—

NC

62

Resolver Excitation PWM

Digital (O)

RSLV_PWM

64

No Connect

—

NC

66

No Connect

—

NC

68

No Connect

—

NC

70

No Connect

—

NC

72

Gate Driver Disable

Digital (O)

GD_DIS

74

No Connect

—

NC

76

No Connect

—

NC

78

No Connect

—

NC

80

No Connect
+5V Power
No Connect Non-Isolated
CAN TX Spare Controller GPIO Spare Controller GPIO

—
Power
— Digital (I/O) Digital (I/O) Digital (I/O)

NC

82

5V_1

84

NC

86

CAN_TX 88

GPIO35 90

GPIO44 92

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Name 93 V_LO_OC

95 LED_Y
97 GND_13 99 W_HI_OC
101 W_LO_OC
103 NC 105 NC 107 NC 109 NC 111 GND_111 113 NC 115 NC 117 NC 119 NC

Type Digital (I)
Digital (O) Power

Description
Phase V Low Overcurrent Yellow LED Control Ground

Digital (I) Digital (I) —

Phase W High Overcurrent Phase W Low Overcurrent No Connect

—

No Connect

—

No Connect

—

No Connect

Power

Ground

—

No Connect

—

No Connect

—

No Connect

—

No Connect

Description Type

Name

Red LED Control Digital (O) LED_R

94

Green

LED Digital (O) LED_G

96

Control

+5V Power

Power

5V_2

98

Spare Controller Digital

GPIO54

100

GPIO

(I/O)

Spare Controller Digital

GPIO55

102

GPIO

(I/O)

No Connect

—

NC

104

Relay Control Digital (O) RELAY1_OUT 106

Relay Control Digital (O) RELAY2_OUT 108

No Connect

—

NC

110

+5V Power

Power

5V_3

112

No Connect

—

NC

114

No Connect

—

NC

116

No Connect

—

NC

118

+5V

Power Digital (I) ~RST

120

(Disabled)

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4. MECHANICAL ASSEMBLY
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REVISION HISTORY

Date May 2023

Revision Rev. 0

Changes Initial Release

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 38 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

IMPORTANT NOTES
PURPOSES AND USE
Wolfspeed, Inc. (on behalf of itself and its affiliates, “Wolfspeed”) reserves the right in its sole discretion to make corrections, enhancements, improvements, or other changes to the board or to discontinue the board.
THE BOARD DESCRIBED IS AN ENGINEERING TOOL INTENDED SOLELY FOR LABORATORY USE BY HIGHLY QUALIFIED AND EXPERIENCED ELECTRICAL ENGINEERS TO EVALUATE THE PERFORMANCE OF WOLFSPEED POWER SWITCHING DEVICES. THE BOARD SHOULD NOT BE USED AS ALL OR PART OF A FINISHED PRODUCT. THIS BOARD IS NOT SUITABLE FOR SALE TO OR USE BY CONSUMERS AND CAN BE HIGHLY DANGEROUS IF NOT USED PROPERLY. THIS BOARD IS NOT DESIGNED OR INTENDED TO BE INCORPORATED INTO ANY OTHER PRODUCT FOR RESALE. THE USER SHOULD CAREFULLY REVIEW THE DOCUMENT TO WHICH THESE NOTIFICATIONS ARE ATTACHED AND OTHER WRITTEN USER DOCUMENTATION THAT MAY BE PROVIDED BY WOLFSPEED (TOGETHER, THE “DOCUMENTATION”) PRIOR TO USE. USE OF THIS BOARD IS AT THE USER’S SOLE RISK.
OPERATION OF BOARD
It is important to operate the board within Wolfspeed’s recommended specifications and environmental considerations as described in the Documentation. Exceeding specified ratings (such as input and output voltage, current, power, or environmental ranges) may cause property damage. If you have questions about these ratings, please contact Wolfspeed prior to connecting interface electronics (including input power and intended loads). Any loads applied outside of a specified output range may result in adverse consequences, including unintended or inaccurate evaluations or possible permanent damage to the board or its interfaced electronics. Please consult the Documentation prior to connecting any load to the board. If you have any questions about load specifications for the board, please contact Wolfspeed at forum.wolfspeed.com for assistance.
Users should ensure that appropriate safety procedures are followed when working with the board as serious injury, including death by electrocution or serious injury by electrical shock or electrical burns can occur if you do not follow proper safety precautions. It is not necessary in proper operation for the user to touch the board while it is energized. When devices are being attached to the board for testing, the board must be disconnected from the electrical source and any bulk capacitors must be fully discharged. When the board is connected to an electrical source and for a short time thereafter until board components are fully discharged, some board components will be electrically charged and/or have temperatures greater than 50° Celsius. These components may include bulk capacitors, connectors, linear regulators, switching transistors, heatsinks, resistors and SiC diodes that can be identified using board schematic. Users should contact Wolfspeed for assistance if a board schematic is not included in the Documentation or if users have questions about a board’s components. When operating the board, users should be aware that these components will be hot and could electrocute or electrically shock the user. As with all electronic evaluation tools, only qualified personnel knowledgeable in handling electronic performance evaluation, measurement, and diagnostic tools should use the board.
USER RESPONSIBILITY FOR SAFE HANDLING AND COMPLIANCE WITH LAWS
Users should read the Documentation and, specifically, the various hazard descriptions and warnings contained in the Documentation, prior to handling the board. The Documentation contains important safety information about voltages and temperatures.
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Users assume all responsibility and liability for the proper and safe handling of the board. Users are responsible for complying with all safety laws, rules, and regulations related to the use of the board. Users are responsible for (1) establishing protections and safeguards to ensure that a user’s use of the board will not result in any property damage, injury, or death, even if the board should fail to perform as described, intended, or expected, and (2) ensuring the safety of any activities to be conducted by the user or the user’s employees, affiliates, contractors, representatives, agents, or designees in the use of the board. User questions regarding the safe usage of the board should be directed to Wolfspeed at forum.wolfspeed.com.
In addition, users are responsible for:
compliance with all international, national, state, and local laws, rules, and regulations that apply to the handling or use of the board by a user or the user’s employees, affiliates, contractors, representatives, agents, or designees. taking necessary measures, at the user’s expense, to correct radio interference if operation of the board causes interference with radio communications. The board may generate, use, and/or radiate radio frequency energy, but it has not been tested for compliance within the limits of computing devices pursuant to Federal Communications Commission or Industry Canada rules, which are designed to provide protection against radio frequency interference.
compliance with applicable regulatory or safety compliance or certification standards that may normally be associated with other products, such as those established by EU Directive 2011/65/EU of the European Parliament and of the Council on 8 June 2011 about the Restriction of Use of Hazardous Substances (or the RoHS 2 Directive) and EU Directive 2002/96/EC on Waste Electrical and Electronic Equipment (or WEEE). The board is not a finished end product and therefore may not meet such standards. Users are also responsible for properly disposing of a board’s components and materials.
NO WARRANTY
THE BOARD IS PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, INCLUDING BUT NOT LIMITED TO ANY WARRANTY OF NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE, WHETHER EXPRESS OR IMPLIED. THERE IS NO REPRESENTATION THAT OPERATION OF THIS BOARD WILL BE UNINTERRUPTED OR ERROR FREE.
LIMITATION OF LIABILITY
IN NO EVENT SHALL WOLFSPEED BE LIABLE FOR ANY DAMAGES OF ANY KIND ARISING FROM USE OF THE BOARD. WOLFSPEED’S AGGREGATE LIABILITY IN DAMAGES OR OTHERWISE SHALL IN NO EVENT EXCEED THE AMOUNT, IF ANY, RECEIVED BY WOLFSPEED IN EXCHANGE FOR THE BOARD. IN NO EVENT SHALL WOLFSPEED BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL, OR SPECIAL LOSS OR DAMAGES OF ANY KIND, HOWEVER CAUSED, OR ANY PUNITIVE, EXEMPLARY, OR OTHER DAMAGES. NO ACTION, REGARDLESS OF FORM, ARISING OUT OF OR IN ANY WAY CONNECTED WITH ANY BOARD FURNISHED BY WOLFSPEED MAY BE BROUGHT AGAINST WOLFSPEED MORE THAN ONE (1) YEAR AFTER THE CAUSE OF ACTION ACCRUED.
INDEMNIFICATION
The board is not a standard consumer or commercial product. As a result, any indemnification obligations imposed upon Wolfspeed by contract with respect to product safety, product liability, or intellectual property infringement do not apply to the board.
PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide © 2023 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and Wolfspeed 40 WolfPACKTM and the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, products, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

References

• Wolfspeed Power Applications Forum
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• CRD25DA12N-FMC 25 kW FM3 Three-Phase Inverter

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