Wolfspeed Crd25da12n-fmc User manual

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide

WolfPACK™ 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.

USER GUIDE PRD-07560

CRD25DA12N-FMC 25 kW Three-Phase Inverter

CRD25DA12N-FMC 25 kW 三相逆变器

CRD25DA12N-FMC 25 kW 三相インバーター

User Guide

Wolfspeed Power Applications

Wolfspeed, Inc.

4600 Silicon Drive

Durham, NC 27703, USA

沃孚半导体有限责任公司

4600 Silicon Drive

Durham, NC 27703, USA

クリー株式会社

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

WolfPACK™ 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.

本文件中的所有内容均以英文书写，“注意”部分的内容以英文、中文和日语书写。作为本板子的终端

用户，即使您不熟悉上述任何一种语言，您也应当确保正确理解本文件中的条款与条件，包括且不限于

本板子的危险隐患以及安全操作条款。

当書類のすべての内容は英語で書きます。「注意点」の内容は英語、中国語、また日本語で書きます。

当ボードの端末使用者は上記の言語が一つでもわからないなら、当端末使用者は当書類の条約と条件

が理解できるのを確保すべきです。そして、当ボードの危険や安全に使用する条件を含み、また限り

ません。

Note: This Wolfspeed-designed evaluation hardware for Wolfspeed®components is a fragile, high-voltage, high-

temperature 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.

本样机（易碎、高压、高温电力电子系统）由Wolfspeed为评估其功率半导体产品而设计，用以作为在实

验室环境下由专业的技术人员或工程师处理和使用的评估工具。本样机不使用时，应存储在-40oC~105oC

温度范围的区域内；如需运输样机，运输过程中应该特别小心，避免损坏电路板等易碎组件。如果您对

此硬件在运输之中的保护有任何疑问，请联系https://forum.wolfspeed.com/。样机应放置在防静电包装

袋内谨慎运输，避免损坏电子组件。本样机不含任何有害物质，但其设计不符合任何工业、技术或安全

标准或分类，也不是可用于生产的组件。

このクリーのコンポーネント用評価ハードウェアは壊れやすい高電圧の高温パワーエレクトロニクスシステムで

あり、ラボ環境での評価ツールとして使用され、優秀な技術者やエンジニアによって処理され、操作されること

を意図している。ハードウェアが使用されていない場合、保管温度が-40℃から105℃の範囲に保管してくださ

い。このハードウェアを輸送する場合は、輸送中にボードまたはその壊れやすいコンポーネントに損傷を与え

ないよう特別な注意を払う必要がある。また電子部品の損傷を避けるためにボードを静電気放電（ESD）袋に

静置して慎重に輸送するべき。ハードウエアの輸送中の保護について質問があれば、

https://forum.wolfspeed.com/に連絡してください。ハードウェアには危険物質が含まれていないが、工業的、

技術的、安全性の基準または分類に適合するように設計されておらず、生産適格組立品でもない。

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide

WolfPACK™ 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.

警告

请认真阅读以下内容，因为其中包含了处理和使用本板子有关的危险隐患和安全操作要求方面的

重要信息。

警告

ボードの使用、危険の対応、そして安全に操作する要求などの大切な情報を含むので、以下の

内容をよく読んでください。

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide

WolfPACK™ 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

WolfPACK™ 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.

警告

请勿在通电情况下接触板子，在操作板子前应使大容量电容器的电荷完全释放。接通电源后，该

评估板上通常会存在危险的高电压，板子上一些组件的温度可能超过 50 摄氏度。此外，移除电

源后，上述情况可能会短时持续，直至大容量电容器电量完全释放。

操作板子时应确保遵守正确的安全规程，否则可能会出现下列危险：

●死亡

●严重伤害

●触电

●电击

●电灼伤

●严重的热烧伤

请在操作本板子前完整阅读本文件。通电时禁止接触板子。所有测试与测量探针或附件必须在板

子通电前连接。通电时，禁止使板子处于无人看护状态，且禁止操作板子。必须确保在操作板子

前，大容量电容器已释放了所有电量。只有在切断板子电源，且大容量电容器完全放电后，才可

更换待测试器件。

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide

WolfPACK™ 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.

警告

通電している時、ボードに接触するのは禁止です。ボードを処分する前に、大容量のコンデン

サーで電力を完全に釈放すべきです。通電してから、ボードにひどく高い電圧が存在している

可能性があります。ボードのモジュールの温度は 50 度以上になるかもしれません。また、電

源を切った後、上記の状況がしばらく持続する可能性がありますので、大容量のコンデンサー

で電力を完全に釈放するまで待ってください。

ボードを操作するとき、正確な安全ルールを守るのを確保すべきです。さもないと、以下の危

険がある可能性があります:

●死亡

●重症

●感電

●電撃

●電気の火傷

●厳しい火傷

当ボードを操作する前に、完全に当書類をよく読んでください。通電している時にボードに接

触する必要がありません。通電する前に必ずすべての試験用のプローブあるいはアクセサリー

をつないでください。通電している時に無人監視やボードを操作するのは禁止です。ボードを

操作する前に、大容量のコンデンサーで電力を完全に釈放するのを必ず確保してください。ボ

ードの電源を切った後、また大容量のコンデンサーで電力を完全に釈放した後、試験設備を取

り換えることができます。

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide

WolfPACK™ 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

WolfPACK™ 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 WolfPACK™ 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 mΩ) Wolfspeed WolfPACK™ 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

WolfPACK™ 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 mΩ) Wolfspeed WolfPACK™ 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 Min. Typ. Max. Unit

POUT Output Power — — 25 kW

VDC DC Bus Voltage — 800 1000

VAUX Low-Power Auxiliary Voltage 10.8 12 13.2

IAUX Low-Power Auxiliary Current — — 5 A

IOUT Output Phase Current — — 30 ARMS

fsSwitching Frequency — 20 100 kHz

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide

WolfPACK™ 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

WolfPACK™ 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

WolfPACK™ 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.

Figure 4: J20 Input Power Connector Pin Numbers

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide

WolfPACK™ 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 # Name Type Description

1 +12V Power +12V Power

2 GND 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.

123456

Figure 5: J1 Voltage Feedback Connector Pin Numbers

Table 4: J1 Voltage Feedback Connector Pinout

Pin # Name Type Description

1 U+ Analog (I) Positive Differential Phase U Voltage Feedback

2 U- Analog (I) Negative Differential Phase U Voltage Feedback

3 V+ Analog (I) Positive Differential Phase V Voltage Feedback

4 V- Analog (I) Negative Differential Phase V Voltage Feedback

5 W+ Analog (I) Positive Differential Phase W Voltage Feedback

6 W- Analog (I) Negative Differential Phase W Voltage Feedback

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide

WolfPACK™ 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.

Figure 6: J4 CAN Port Pin Numbers

Table 5: J4 CAN Port Pinout

Pin # Name Type Description

1 NC0 — No Connect

2 CAN_L Digital (I/O) Isolated CAN Low

3 V- Power Isolated Ground

4 NC1 — No Connect

5 SHLD Power Isolated Ground

6 O(V-) — No Connect

7 CAN_H Digital (I/O) Isolated CAN High

8 NC2 — No Connect

9 V+ Power Isolated +5V Power

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide

WolfPACK™ 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.

Figure 7: J16 Resolver Connector Pin Numbers

Table 6: J16 Resolver Connector Pinout

Pin # Name Type Description

1 EXC_P Digital (O) Positive Differential Resolver Excitation Signal

2 EXC_N Digital (O) Negative Differential Resolver Excitation Signal

3 SIN_P Analog (I) Positive Differential Signal Resolver Sine Feedback

4 SIN_N Analog (I) Negative Differential Signal Resolver Sine Feedback

5 COS_P Analog (I) Positive Differential Signal Resolver Cosine Feedback

6 COS_N 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

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property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

1 2 1 2

Figure 8: J11 and J15 Relay Connector Pin Numbers

Table 7: J11 and J15 Relay Connector Pinout

Pin # Name Type Description

1 +12V Power +12V Power

2 GND 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.

1 2

11 12

Figure 9: J8 Spare Connector Pin Numbers

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide

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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 # Name Type Description

1 +3.3V Power +3.3V Power

2 +5V Power +5V Power

3 GND Power Ground

4 GND Power Ground

5 A14 Analog (I) Connected to Controller Analog A14

6 C14 Analog (I) Connected to Controller Analog C14

7 GPIO35 Digital (I/O) Connected to Controller GPIO35

8 GPIO44 Digital (I/O) Connected to Controller GPIO44

9 GPIO54 Digital (I/O) Connected to Controller GPIO54

10 GPIO55 Digital (I/O) Connected to Controller GPIO55

11 GND Power Ground

12 +12V 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 low-

power 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

WolfPACK™ 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

TP12TP11TP10

TP8

TP9

TP13

TP14

TP15

TP5

TP6

TP7

GATE3

V-HIGH

GATE1

U-HIGH

GATE5

W-HIGH

J13

GATE4

V-LOW

J12

GATE2

U-LOW

J14

GATE6

W-LOW

Figure 10: Gate and Test Point Measurement Locations

Table 9: Test Point Descriptions

Ref Designator Signal Color Description

TP1 DC+ Red Positive DC-Link Voltage

TP2 DC+ Red Positive DC-Link Voltage

TP3 DC- Black Negative DC-Link Voltage

TP4 DC- Black Negative DC-Link Voltage

PRD-07560 REV. 0, May 2023 CRD25DA12N-FMC 25 kW Three-Phase Inverter User Guide

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property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship, or association.

TP5 +3.3V Red +3.3V Power

TP6 +5V Red +5V Power

TP7 GND Black Ground

TP8 +15V Red +15V Power

TP9 -15V Red -15V Power

TP10 U_OUT White U Phase

TP11 V_OUT White V Phase

TP12 W_OUT White W Phase

TP13 GND Black Ground

TP14 +12V Red +12V Power

TP15 GND 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 50⁰ 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

WolfPACK™ 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.

3.1. Power Stage

The power stage of this design uses three 65 μF low-inductance capacitors in parallel to form a total of 195 μF

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.

警告

通电时不必接触板子。连接器件进行测试时，必须切断板子电源，且大容量电容器必须释放完所

有电荷。

板子上一些组件的温度可能超过 50 摄氏度。移除电源后，上述情况可能会短暂持续，直至大容

量电容器完全释放电荷。通电时禁止触摸板子，应在大容量电容器完全释放电荷后，再操作电路

板。

请确保在操作电路板时已经遵守了正确的安全规程，否则可能会造成严重伤害，包括触电死亡、

电击伤害、或电灼伤。

警告

通電している時にボードに接触する必要がありません。設備をつないで試験する時、必ずボー

ドの電源を切ってください。また、大容量のコンデンサーで電力を完全に釈放してください。

ボードのモジュールの温度は 50 度以上になるかもしれません。電源を切った後、上記の状況

がしばらく持続する可能性がありますので、大容量のコンデンサーで電力を完全に釈放するま

で待ってください。通電している時にボードに接触するのは禁止です。大容量のコンデンサー

で電力をまだ完全に釈放していない時、ボードを操作しないでください。

ボードを操作している時、正確な安全ルールを守っているのを確保してください。さもなけれ

ば、感電、電撃、厳しい火傷などの死傷が出る可能性があります。

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