Wolfspeed SPEEDVAL KIT HALF-BRIDGE MOD-MB-HB-0900V-40A User manual

1
PRD-06829 REV. 1, December 2022 SpeedVal Kit™ Half-Bridge User Guide
© 2022 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and the
SpeedVal Kit™ and Wolfspeed logo is a trademark of Wolfspeed, Inc. Other trademarks, product 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-06829
MOD-MB-HB-0900V-40A
SPEEDVAL KIT™ HALF-BRIDGE
USER GUIDE
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 an application note to install and operate Wolfspeed evaluation hardware.

2
PRD-06829 REV. 1, December 2022 SpeedVal Kit™ Half-Bridge User Guide
© 2022 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and the
SpeedVal Kit™ and Wolfspeed logo is a trademark of Wolfspeed, Inc. Other trademarks, product 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
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、
forum.wolfspeed.com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。

3
PRD-06829 REV. 1, December 2022 SpeedVal Kit™ Half-Bridge User Guide
© 2022 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and the
SpeedVal Kit™ and Wolfspeed logo is a trademark of Wolfspeed, Inc. Other trademarks, product 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。

4
PRD-06829 REV. 1, December 2022 SpeedVal Kit™ Half-Bridge User Guide
© 2022 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and the
SpeedVal Kit™ and Wolfspeed logo is a trademark of Wolfspeed, Inc. Other trademarks, product 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.

5
PRD-06829 REV. 1, December 2022 SpeedVal Kit™ Half-Bridge User Guide
© 2022 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and the
SpeedVal Kit™ and Wolfspeed logo is a trademark of Wolfspeed, Inc. Other trademarks, product 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。

6
PRD-06829 REV. 1, December 2022 SpeedVal Kit™ Half-Bridge User Guide
© 2022 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and the
SpeedVal Kit™ and Wolfspeed logo is a trademark of Wolfspeed, Inc. Other trademarks, product 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。

7
PRD-06829 REV. 1, December 2022 SpeedVal Kit™ Half-Bridge User Guide
© 2022 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and the
SpeedVal Kit™ and Wolfspeed logo is a trademark of Wolfspeed, Inc. Other trademarks, product 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. BOARD OVERVIEW ........................................................................................................................................... 10
2.1. SIZE ...................................................................................................................................................................... 10
2.2. MOTHERBOARD OVERVIEW ....................................................................................................................................... 11
3. SPEEDVAL KIT™ DAUGHTER CARD CONNECTORS .............................................................................................. 12
3.1. GATE DRIVER CARD CONNECTORS .............................................................................................................................. 13
3.2. POWER DAUGHTER CARD CONNECTOR (CON16).......................................................................................................... 14
3.3. CONTROL CARD CONNECTOR (J5) ............................................................................................................................... 15
4. ELECTRICAL FEATURES ...................................................................................................................................... 16
4.1. MAIN POWER TERMINALS, LOGIC POWER, COOLING FAN ............................................................................................... 18
4.2. DIGITAL IO AND REMOTE SENSING CONNECTOR ............................................................................................................ 19
4.3. CURRENT SENSOR AND SCALING ................................................................................................................................. 20
4.4. CURRENT TRANSFORMER OUTPUT .............................................................................................................................. 21
4.5. NTC TEMPERATURE SENSING ..................................................................................................................................... 22
4.6. OVERCURRENT PROTECTION (OCP) ............................................................................................................................ 23
4.7. PWM INPUT .......................................................................................................................................................... 24
5. DOUBLE PULSE MEASUREMENTS AND CURRENT SENSING ................................................................................ 26
5.1. HIGH RESISTANCE SHUNT ......................................................................................................................................... 26
5.2. TWO STAGE CURRENT TRANSFORMER ......................................................................................................................... 26
5.3. COMPARING TWO STAGE CT AND SHUNT RESULTS ........................................................................................................ 29
5.4. DOUBLE PULSE MEASUREMENTS ................................................................................................................................. 31
A. Deskew ............................................................................................................................................................... 33
B. Switching Loss Measurements ........................................................................................................................... 37
C. Reverse Recovery Charge (QRR) ........................................................................................................................... 40
6. LAYOUT ............................................................................................................................................................ 42
7. THERMAL MANAGEMENT ................................................................................................................................. 43
8. SUPPORTED POWER TOPOLOGIES AND CONNECTION DIAGRAMS ..................................................................... 44
8.1. SYNCHRONOUS BOOST CONVERTER ............................................................................................................................ 44
8.2. ASYNCHRONOUS BOOST CONVERTER .......................................................................................................................... 45
8.3. SYNCHRONOUS BUCK CONVERTER ............................................................................................................................. 46
8.4. ASYNCHRONOUS BUCK CONVERTER ........................................................................................................................... 47
9. APPLICATION EXAMPLE – SYNCHRONOUS BOOST CONVERTER ......................................................................... 48
10. TROUBLESHOOTING ..................................................................................................................................... 51
11. REVISION HISTORY ....................................................................................................................................... 53
12. IMPORTANT NOTES ...................................................................................................................................... 53

8
PRD-06829 REV. 1, December 2022 SpeedVal Kit™ Half-Bridge User Guide
© 2022 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and the
SpeedVal Kit™ and Wolfspeed logo is a trademark of Wolfspeed, Inc. Other trademarks, product 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
The purpose of the SpeedVal Kit™ platform is to provide a single evaluation platform that allows almost all
discrete Wolfspeed® SiC MOSFETs and diodes (650 V to 1200 V) to be evaluated and tested in a common
platform. The half-bridge motherboard supports testing that measures switching energy using double-
pulse testing (DPT) as well as system testing in many common topologies including buck and boost, both
synchronous and asynchronous. Each power daughter card comes fully assembled with its own thermal
management system comprised of a heatsink and thermal isolator.
The SpeedVal Kit platform allows different Wolfspeed SiC MOSFETs and diodes to be swapped in a matter
of seconds. Moreover, by testing different devices on the same platform, with the same layout and gate
driver, any measured differences can be correctly attributed to the device itself. Historically, testing
MOSFETs in different packages required testing on different boards which may have different gate drivers.
It was impossible to know what, if any, of the measured differences were due to the MOSFET itself or due to
other variables such as the layout and gate driver. The SpeedVal Kit platform allows users to swap out not
only MOSFETs of different RDS(ON) but also MOSFETs in different packages.
The SpeedVal Kit platform has many compatible gate driver cards available from carefully selected
partners that allow users to compare device performance with different gate drivers while holding all other
variables constant. This allows users to quickly select the best combination of device and gate driver for
their application. This pairing can be carried into the user’s own design, reducing design risk and
shortening the product development cycle time.
The SpeedVal Kit platform built on the half-bridge motherboard works with the following other building
blocks:
I. Power Daughter Card (1 required) – Half-bridge configuration of two MOSFETs or a MOSFET
and a diode
II. Gate Driver Card (1 required) – Two-channel driver card including gate power supplies
III. Control Card and User Interface (optional)
IV. Buck Boost Filter Board (optional)
V. Air Core Inductor (optional) – For double-pulse testing

9
PRD-06829 REV. 1, December 2022 SpeedVal Kit™ Half-Bridge User Guide
© 2022 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and the
SpeedVal Kit™ and Wolfspeed logo is a trademark of Wolfspeed, Inc. Other trademarks, product and company names
are the property of their respective owners and do not imply specific product and/or vendor endorsement,
sponsorship or association.
Kit Contents
The SpeedVal Kit motherboard comes with all necessary hardware to set the board on a bench and attach
the gate driver and power daughter cards. The kit contains all required gate driver cables and MMCX to BNC
adapters to simplify probing the VGS and IDS test points on the power daughter card. Also included is a
surface mount (SMT) current transformer that can be used for IDS measurement on the power daughter
cards and an adapter board for compatibility with the NXP control card.
Item Qty Description Mfg. Part No. Notes
1 1 Half-Bridge Motherboard PCB Assembly Wolfspeed MOD-MBHB-0900V-40A
2 2 Desat Cable Assembly Wolfspeed -
3 6 Standoff, Nylon, 8-32, MF, 1.75 in, off-white Essentra 36832MF175 or equivalent
4 8 Machine Screw Pan Phillips 8-32, 0.25 L Essentra NSP-8-4-01 or equivalent
5 2 Washer, Nylon, #8, 0.055-0.070 Essentra 16FW008062 or equivalent
6 2 Screw, 8-32, 0.250, PPH, Nylon Essentra 010832PW025 or equivalent
7 2 Hex Standoff, 8-32, 0.375 Essentra 36832MF037 or equivalent
8 8 Hex Nut 8-32 Thread .170 height Essentra 0400832HNS or equivalent
9 2 Cable Assembly Coaxial BNC to MMCX 6.00" Amphenol RF 095-850-207-006 or equivalent
10 1 Cable Assembly, Ribbon, 16P - -
11 1 Current Transformer Sumida T93020
12 1 Interposer PCB Assembly Wolfspeed -
TABLE 1: MOTHERBOARD EVALUATION KIT CONTENTS
Each SpeedVal Kit motherboard has a unique part number that follows the convention listed in Figure 1
below.
FIGURE 1: MOTHERBOARD NAMING CONVENTION
Maximum Bus and Power Terminal Ratings
 The maximum voltage rating for the DC bus is 900 V.
 The maximum current rating for the DC bus and switch node terminals is 40 A.

10
PRD-06829 REV. 1, December 2022 SpeedVal Kit™ Half-Bridge User Guide
© 2022 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and the
SpeedVal Kit™ and Wolfspeed logo is a trademark of Wolfspeed, Inc. Other trademarks, product and company names
are the property of their respective owners and do not imply specific product and/or vendor endorsement,
sponsorship or association.
2. BOARD OVERVIEW
2.1. SIZE
FIGURE 2: PRODUCT DIMENSIONS MOD-MB-HB-0900 V-40 A: TOP VIEW (LEFT) AND FRONT VIEW (RIGHT)
182.8 mm
203.4
mm
mm
mm
mm